def serialPortRead(passNumber):
#passes = satOrb.get_next_passes(datetime.utcnow(),120, -30.8047389406, 72.9167, 180.85)
#next get number of passes the user wants
satOrb = Orbital(satName, tleFile)
passes = satOrb.get_next_passes(current_time,int(passNumber), home.lat, home.lon, home.elevation)
for eachPass in passes:
rise = eachPass[0]
fall = eachPass[1]
apex = eachPass[2]
# Lon, Lat
obsRiseAngle, obsRiseElv = satOrb.get_observer_look(rise, home.lat, home.lon, home.elevation)
obsFallAngle, obsFallElv = satOrb.get_observer_look(fall, home.lat, home.lon, home.elevation)
obsApexAngle, obsApexElv = satOrb.get_observer_look(apex, home.lat, home.lon, home.elevation)
print("observer apex", obsApexElv)
print("Rise Time:", rise, "Azimuth:", round(obsRiseAngle, 2),
'(', azimuthDirection(obsRiseAngle), ')', "Elevation:", abs(round(obsRiseElv, 2)))
print("Apex Time:", apex, "Azimuth:", round(obsApexAngle, 2),
'(', azimuthDirection(obsApexAngle), ')', "Elevation:", abs(round(obsApexElv, 2)))
print("Fall Time:", fall, "Azimuth:", round(obsFallAngle, 2),
'(', azimuthDirection(obsFallAngle), ')', "Elevation:", abs(round(obsFallElv, 2)))
print()
return
def get_angles(self):
self.get_times()
tle1, tle2 = self.get_tle_lines()
orb = Orbital(self.spacecrafts_orbital[self.spacecraft_id],
line1=tle1,
line2=tle2)
sat_azi, sat_elev = orb.get_observer_look(self.times[:, np.newaxis],
self.lons, self.lats, 0)
sat_zenith = 90 - sat_elev
sun_zenith = astronomy.sun_zenith_angle(self.times[:, np.newaxis],
self.lons, self.lats)
alt, sun_azi = astronomy.get_alt_az(self.times[:, np.newaxis],
self.lons, self.lats)
del alt
sun_azi = np.rad2deg(sun_azi)
sun_azi = np.where(sun_azi < 0, sun_azi + 180, sun_azi - 180)
rel_azi = abs(sat_azi - sun_azi)
rel_azi = np.where(rel_azi > 180.0, 360.0 - rel_azi, rel_azi)
return sat_azi, sat_zenith, sun_azi, sun_zenith, rel_azi
class Satellite:
""" Retrieve orbital parameters of the selected LEO object """
def __init__(self, name):
urllib.request.urlretrieve(
'http://celestrak.com/NORAD/elements/stations.txt', 'stations.txt')
self.orb = Orbital(name, 'stations.txt')
self.data = []
def azimuth(self):
""" Return object azimuth """
self.__update_data()
return self.data[0]
def elevation(self):
""" Return object elevation """
self.__update_data()
return self.data[1]
def __update_data(self):
self.data = self.orb.get_observer_look(datetime.utcnow(), 25.279652,
54.687157, 1)
def is_up(self):
""" Return object elevation """
self.__update_data()
return True if self.data[1] > 10 else False
def get_satellite_coordinates(lon, lat, alt, satellite_id):
try:
satellite = Satellite.objects.get(id=satellite_id)
orb = Orbital(satellite.codename)
now = datetime.utcnow()
return orb.get_observer_look(now, lon, lat, alt)
except Satellite.DoesNotExist:
return None
def _get_sat_angles_with_tle(self):
tle1, tle2 = self.get_tle_lines()
orb = Orbital(self.spacecrafts_orbital[self.spacecraft_id],
line1=tle1,
line2=tle2)
sat_azi, sat_elev = orb.get_observer_look(self.times[:, np.newaxis],
self.lons, self.lats, 0)
return sat_azi, sat_elev
def serial_az_el(name, stop_time=(
datetime.utcnow())): # sends data over serial to arduino format (az, el)
satellite = Orbital(name, tle_file=nextPass.path_to_tle)
now = datetime.utcnow()
while int(
(stop_time - now).total_seconds()) >= 0: # while pass is occurring
now = datetime.utcnow()
print(
satellite.get_observer_look(now, nextPass.lon, nextPass.lat,
nextPass.alt)) # print (az, el)
sleep(2) # wait 2 seconds
def ground_truth(lat, lon, time, sat, duration):
orb = Orbital(sat, tle_file="active.txt")
delta = timedelta(seconds=1)
azs = []
els = []
for i in range(duration):
az, el = pwm_for(*orb.get_observer_look(time, lon, lat, 0))
azs.append(az)
els.append(el)
time += delta
return azs, els
def get_angles(self):
"""Get azimuth and zenith angles.
Azimuth angle definition is the same as in pyorbital, but with
different units (degrees not radians for sun azimuth angles)
and different ranges.
Returns:
sat_azi: satellite azimuth angle
degree clockwise from north in range ]-180, 180],
sat_zentih: satellite zenith angles in degrees in range [0,90],
sun_azi: sun azimuth angle
degree clockwise from north in range ]-180, 180],
sun_zentih: sun zenith angles in degrees in range [0,90],
rel_azi: absolute azimuth angle difference in degrees between sun
and sensor in range [0, 180]
"""
self.get_times()
self.get_lonlat()
tle1, tle2 = self.get_tle_lines()
times = self.times
orb = Orbital(self.spacecrafts_orbital[self.spacecraft_id],
line1=tle1,
line2=tle2)
sat_azi, sat_elev = orb.get_observer_look(times[:, np.newaxis],
self.lons, self.lats, 0)
sat_zenith = 90 - sat_elev
sun_zenith = astronomy.sun_zenith_angle(times[:, np.newaxis],
self.lons, self.lats)
alt, sun_azi = astronomy.get_alt_az(times[:, np.newaxis], self.lons,
self.lats)
del alt
sun_azi = np.rad2deg(sun_azi)
rel_azi = get_absolute_azimuth_angle_diff(sun_azi, sat_azi)
# Scale angles range to half open interval ]-180, 180]
sat_azi = centered_modulus(sat_azi, 360.0)
sun_azi = centered_modulus(sun_azi, 360.0)
# Mask corrupt scanlines
for arr in (sat_azi, sat_zenith, sun_azi, sun_zenith, rel_azi):
arr[self.mask] = np.nan
return sat_azi, sat_zenith, sun_azi, sun_zenith, rel_azi
def get_parallaxed_coor(sat, tle, t, lat, lon, alt, h):
"""
"""
# Setup orbital class with TLE file
orbit = Orbital(sat, line1=tle.line1, line2=tle.line2)
pos = orbit.get_position(t)
# Calculate observer azimuth and elevation
azi, ele = orbit.get_observer_look(t, lon, lat, alt)
# Apply parallax correction for given heights
x, y, z = parallax_corr(h, azi, ele)
# WGS84 parameters
f = 1 / 298.257223563
a = 6378137.
# Convert coordinates and azimuth to radians
radlat = np.deg2rad(lat)
radlon = np.deg2rad(lon)
radazi = np.deg2rad(azi)
# Calculate shifted point coordinates
nlat, nlon, nazi = vinc_pt(f, a, radlat, radlon, radazi, z)
# Reconvert to degree
nlat = np.rad2deg(nlat)
nlon = np.rad2deg(nlon)
nazi = np.rad2deg(nazi)
info = "\n--------------------------------------------------------" + \
"\n ----- Parallax correction summary -----" +\
"\n--------------------------------------------------------" + \
"\n Satellite Name: " + sat + \
"\n Observation Time: " + \
datetime.datetime.strftime(t, "%Y-%m-%d %H:%M:%S") + \
"\n Satellite Position: " + str(pos[0]) + \
"\n Satellite Velocity: " + str(pos[1]) + \
"\n-----------------------------------" + \
"\n Latitude: " + str(lat) + \
"\n Longitude: " + str(lon) + \
"\n Altitude: " + \
str(alt) + "\n Height: " + str(h) + \
"\n-----------------------------------" +\
"\n Azimuth: " + str(azi) + \
"\n Elevation: " + str(ele) + \
"\n Parallax Distance: " + str(z) + \
"\n New Latitude: " + str(nlat) + \
"\n New Longitude: " + str(nlon) + \
"\n--------------------------------------------------------"
logger.debug(info)
return(z, nlat, nlon)
def get_view_zen_angles(sat_name, tle_filename, area_def_name, time_slot):
"""Calculate the satellite zenith angles for the given satellite
(*sat_name*, *tle_filename*), *area_def_name* and *time slot*.
Stores the result in the given *cache* parameter.
"""
try:
from pyorbital.orbital import Orbital
except ImportError:
LOGGER.warning("Could not load pyorbital modules")
return
area_def = get_area_def(area_def_name)
lons, lats = area_def.get_lonlats()
orbital_obj = Orbital(sat_name, tle_filename)
elevation = orbital_obj.get_observer_look(time_slot, lons, lats, 0)[1]
view_zen_data = np.subtract(90, np.ma.masked_outside(elevation, 0, 90))
return view_zen_data
def getSentinel2Geometry(startDateUTC, lengthDays, lat, lon, alt=0.0, mission="Sentinel-2a",
tleFile="../TLE/norad_resource_tle.txt"):
"""Calculate approximate geometry for Sentinel overpasses.
Approximate because it assumes maximum satellite elevation
is the time at which target is imaged.
:param startDateUTC: a datetime object specifying when to start prediction.
:type startDateUTC: object
:param lengthDays: number of days over which to perform calculations.
:type lengthDays: int
:param lat: latitude of target.
:type lat: float
:param lon: longitude of target.
:type lon: float
:param alt: altitude of target (in km).
:type alt: float
:param mission: mission name as in TLE file.
:type mission: str
:param tleFile: TLE file.
:type tleFile: str
:return: a python list containing instances of the sensorGeometry class arranged in date order.
:rtype: list
"""
orb = Orbital(mission, tleFile)
passes = orb.get_next_passes(startDateUTC, 24 * lengthDays, lon, lat, alt)
geomList = []
for p in passes:
look = orb.get_observer_look(p[2], lon, lat, alt)
vza = 90 - look[1]
vaa = look[0]
sza = ast.sun_zenith_angle(p[2], lon, lat)
saa = np.rad2deg(ast.get_alt_az(p[2], lon, lat)[1])
if sza < 90 and vza < 10.3:
thisGeom = sensorGeometry()
thisGeom.date_utc = p[2]
thisGeom.vza = vza
thisGeom.vaa = vaa
thisGeom.sza = sza
thisGeom.saa = saa
geomList.append(thisGeom)
return geomList
def get_view_zen_angles(sat_name, tle_filename, area_def_name,
time_slot):
"""Calculate the satellite zenith angles for the given satellite
(*sat_name*, *tle_filename*), *area_def_name* and *time slot*.
Stores the result in the given *cache* parameter.
"""
try:
from pyorbital.orbital import Orbital
except ImportError:
LOGGER.warning("Could not load pyorbital modules")
return
area_def = get_area_def(area_def_name)
lons, lats = area_def.get_lonlats()
orbital_obj = Orbital(sat_name, tle_filename)
elevation = orbital_obj.get_observer_look(time_slot, lons, lats, 0)[1]
view_zen_data = np.subtract(90, np.ma.masked_outside(elevation, 0, 90))
return view_zen_data
def plot_iss(ax, obs_time, obs_loc, tle=None):
"""
Put International Space Station on the plot. The function uses TLE list if
it was given or tries to retrieve it via PyOrbital package
"""
if tle is None:
from pyorbital.orbital import Orbital
print("request ISS' two-line elements via PyOrbital...")
orb = Orbital("ISS (ZARYA)")
iss = orb.get_observer_look(obs_time.value, obs_loc.lon.value,
obs_loc.lat.value, obs_loc.height.value)
iss_coord = SkyCoord(iss[0],
iss[1],
unit='deg',
frame='altaz',
obstime=obs_time,
location=obs_loc)
else:
import ephem
iss = ephem.readtle('ISS', tle[0], tle[1])
location = ephem.Observer()
location.lat = str(obs_loc.lat.value)
location.lon = str(obs_loc.lon.value)
location.date = obs_time.value
iss.compute(location)
iss_coord = SkyCoord(iss.az,
iss.alt,
unit='rad',
frame='altaz',
obstime=obs_time,
location=obs_loc)
iss_coord = iss_coord.transform_to('icrs')
ax.plot([iss_coord.ra.radian], [-iss_coord.dec.value + 45],
label='ISS',
linestyle='',
color='green',
marker='$⋈$',
markersize=markers['iss'])
print("ISS is plotted")
class PyOrbitalLayer(OrbitalLayer):
"""
pyorbital based orbital layer
"""
__implements__ = (OrbitalLayer,)
def __init__(self, aoi, sat, instrument="AVHRR"):
OrbitalLayer.__init__(self,aoi,sat,instrument)
# instantiate orbital module
config_file_path = ""
try:
config_file_path = os.environ['PYGRANULE_CONFIG_PATH']
except KeyError:
print "pygranule config file path missing. Has the 'PYGRANULE_CONFIG_PATH' environment variable been set?"
default_tle_file = config_file_path+"/default.tle"
try:
self.orbital = Orbital(sat,default_tle_file)
except:
print "Failed to open default tle file:", default_tle_file
print "Downloading from internet:"
try:
self.orbital = Orbital(sat)
except:
raise OrbitalLayerError("Pyorbital Failed to fetch TLE from internet.")
# create scan geometry - one scan line.
if instrument == "AVHRR":
scan_steps = np.arange(0,self.instrument_info['scan_steps'],self.instrument_info['scan_steps']/8-1)
scan_steps[-1] = self.instrument_info['scan_steps']-1
self.scan_geom = avhrr(1,scan_steps)
elif instrument == "VIIRS":
self.scan_geom = viirs(1)
def set_tle(self, line1, line2):
# for now restart pyorbital with these new elements.
del self.orbital
self.orbital = Orbital(self.sat,line1=line1, line2=line2)
def orbital_period(self):
return 24*60/self.orbital.tle.mean_motion
def scan_line_lonlats(self, t):
"""
Returns a single instrument scan line starting at datetime t
"""
s_times = self.scan_geom.times(t)
pixels_pos = compute_pixels((self.orbital.tle.line1, self.orbital.tle.line2),
self.scan_geom, s_times)
pos_time = get_lonlatalt(pixels_pos, s_times)
return np.array((pos_time[0],pos_time[1]))
def next_transit(self, start=datetime.now(), resolution=100):
"""
Next transit time relative to center of aoi.
Resolution accuracy defined by subdivision of orbital period.
"""
# accuracy in mintues from mean orbital period
dt = self.orbital_period()/resolution
# observer position
alt = 0.0
lon, lat = self.aoi_center()
# NOTE: For now I do not use the pyorbital
# get_next_passes. Because it accepts integer (not float) hours
# for the search period, and the accuracy of the transit time
# search is not obvious to me at the moment.
# Also I would like to allow negative transit time altitudes
# - transits below horizon.
# Therefore I re-implement the search myself, here to have more control:
t_offsets = np.arange(0.0,self.orbital_period()*1.2,dt)
e = np.array( [ self.orbital.get_observer_look(start + timedelta(minutes=t_offset), lon, lat, alt)[1] \
for t_offset in t_offsets ] )
# search for local maxima
b = (np.roll(e,1)<e)&(np.roll(e,-1)<e)
idx = np.where(b[1:]==True)[0][0]+1 #i.e. do not accept index 0 as maximum...
## return a quadratic maximum for good accuracy based on data.
## Quadratic fit to 3 points around maximum elevation
## seems to improve accuracy by 100-fold.
x,y = t_offsets[idx-1:idx+2],e[idx-1:idx+2]
fit = np.polyfit(x,y,2)
t = -fit[1]/(2.0*fit[0])
#from matplotlib import pyplot as plt
#plt.plot(x,y,'x')
#fitx = np.arange(x[0]-1,x[2]+1,0.1)
#fity = fit[2]+fit[1]*fitx+fit[0]*(fitx**2)
#plt.plot(fitx,fity,'r-')
#plt.show()
return start + timedelta(minutes=t)
def SatStats():
#tle = r"C:\Users\Jake\Python\TLE Files\stations-tle.txt"
# Download TLE file
#downloadUrl = "http://www.celestrak.com/NORAD/elements/stations.txt"
#urllib.request.urlretrieve(downloadUrl, tle)
tle = GetTLEFile()
stationList = GetStationList(tle)
try:
while(True):
stationNumber = input("Enter Station Number: ")
print()
if stationNumber == 'n':
for name in enumerate(stationList):
print(name[0], ':', name[1].replace('\n', ''))
print()
else:
break
stationNumber = int(stationNumber)
if stationNumber < len(stationList):
# Get Platform Object
station = stationList[stationNumber]
stationObject = tlefile.read(station, tle)
GoogleSearch(station)
# Print Platform Info
PrintTLEInfo(stationObject, station)
lon, lat, alt, now = GetGPSPosition(station, tle, datetime.utcnow())
dmLon, dmLat = DegreeMinutes(lon, lat)
print("Current GPS location:\n", "Latitude: ", lat, " Longitude: ", lon, " Altitude (km): ", alt, sep='')
print("Current GPS location:\n", "Latitude: ", dmLat, " Longitude: ", dmLon, " Altitude (km): ", alt, sep='')
satOrb = Orbital(station, tle)
print()
PrintFreqData(GetFreqData(station, "C:/Users/Jake/Python/Satellite Tracker/frequencies/satfreqlist.csv"))
passes = satOrb.get_next_passes(datetime.utcnow(), 120, -90.5546910, 38.6475290, 180.85)
print("Next passes in 5 days (Max Elevation Above 20 deg):")
for eachPass in passes:
rise = eachPass[0]
fall = eachPass[1]
apex = eachPass[2]
# Lon, Lat
obsRiseAngle, obsRiseElv = satOrb.get_observer_look(rise, -90.5546910, 38.6475290, 180.85)
obsFallAngle, obsFallElv = satOrb.get_observer_look(fall, -90.5546910, 38.6475290, 180.85)
obsApexAngle, obsApexElv = satOrb.get_observer_look(apex, -90.5546910, 38.6475290, 180.85)
if obsApexElv >= 20.0:
print("Rise Time:", rise, "Azimuth:", round(obsRiseAngle, 2),
'(', AzimuthDirection(obsRiseAngle), ')', "Elevation:", abs(round(obsRiseElv, 2)))
print("Apex Time:", apex, "Azimuth:", round(obsApexAngle, 2),
'(', AzimuthDirection(obsApexAngle), ')', "Elevation:", abs(round(obsApexElv, 2)))
print("Fall Time:", fall, "Azimuth:", round(obsFallAngle, 2),
'(', AzimuthDirection(obsFallAngle), ')', "Elevation:", abs(round(obsFallElv, 2)))
print()
except:
pass
class PyOrbitalLayer(OrbitalLayer):
"""
pyorbital based orbital layer
"""
__implements__ = (OrbitalLayer, )
def __init__(self, aoi, sat, instrument="AVHRR"):
OrbitalLayer.__init__(self, aoi, sat, instrument)
# instantiate orbital module
config_file_path = ""
try:
config_file_path = os.environ['PYGRANULE_CONFIG_PATH']
except KeyError:
print "pygranule config file path missing. Has the 'PYGRANULE_CONFIG_PATH' environment variable been set?"
default_tle_file = config_file_path + "/default.tle"
try:
self.orbital = Orbital(sat, default_tle_file)
except:
print "Failed to open default tle file:", default_tle_file
print "Downloading from internet:"
try:
self.orbital = Orbital(sat)
except:
raise OrbitalLayerError(
"Pyorbital Failed to fetch TLE from internet.")
# create scan geometry - one scan line.
if instrument == "AVHRR":
scan_steps = np.arange(0, self.instrument_info['scan_steps'],
self.instrument_info['scan_steps'] / 8 - 1)
scan_steps[-1] = self.instrument_info['scan_steps'] - 1
self.scan_geom = avhrr(1, scan_steps)
elif instrument == "VIIRS":
self.scan_geom = viirs(1)
def set_tle(self, line1, line2):
# for now restart pyorbital with these new elements.
del self.orbital
self.orbital = Orbital(self.sat, line1=line1, line2=line2)
def orbital_period(self):
return 24 * 60 / self.orbital.tle.mean_motion
def scan_line_lonlats(self, t):
"""
Returns a single instrument scan line starting at datetime t
"""
s_times = self.scan_geom.times(t)
pixels_pos = compute_pixels(
(self.orbital.tle.line1, self.orbital.tle.line2), self.scan_geom,
s_times)
pos_time = get_lonlatalt(pixels_pos, s_times)
return np.array((pos_time[0], pos_time[1]))
def next_transit(self, start=datetime.now(), resolution=100):
"""
Next transit time relative to center of aoi.
Resolution accuracy defined by subdivision of orbital period.
"""
# accuracy in mintues from mean orbital period
dt = self.orbital_period() / resolution
# observer position
alt = 0.0
lon, lat = self.aoi_center()
# NOTE: For now I do not use the pyorbital
# get_next_passes. Because it accepts integer (not float) hours
# for the search period, and the accuracy of the transit time
# search is not obvious to me at the moment.
# Also I would like to allow negative transit time altitudes
# - transits below horizon.
# Therefore I re-implement the search myself, here to have more control:
t_offsets = np.arange(0.0, self.orbital_period() * 1.2, dt)
e = np.array( [ self.orbital.get_observer_look(start + timedelta(minutes=t_offset), lon, lat, alt)[1] \
for t_offset in t_offsets ] )
# search for local maxima
b = (np.roll(e, 1) < e) & (np.roll(e, -1) < e)
idx = np.where(
b[1:] == True)[0][0] + 1 #i.e. do not accept index 0 as maximum...
## return a quadratic maximum for good accuracy based on data.
## Quadratic fit to 3 points around maximum elevation
## seems to improve accuracy by 100-fold.
x, y = t_offsets[idx - 1:idx + 2], e[idx - 1:idx + 2]
fit = np.polyfit(x, y, 2)
t = -fit[1] / (2.0 * fit[0])
#from matplotlib import pyplot as plt
#plt.plot(x,y,'x')
#fitx = np.arange(x[0]-1,x[2]+1,0.1)
#fity = fit[2]+fit[1]*fitx+fit[0]*(fitx**2)
#plt.plot(fitx,fity,'r-')
#plt.show()
return start + timedelta(minutes=t)
def trackHotspotSatellite(arglist=None):
parser = ArgumentRecorder(
description=
'Track satellite position, bearing, previous and next passdatetimes from hotspot data.',
fromfile_prefix_chars='@')
parser.add_argument('-v', '--verbosity', type=int, default=1, private=True)
parser.add_argument('-u',
'--user',
type=str,
required=True,
help="PostgreSQL username")
parser.add_argument('-d',
'--database',
type=str,
required=True,
help="PostgreSQL database")
parser.add_argument('-l',
'--limit',
type=int,
help='Limit number of rows to process')
parser.add_argument('-t',
'--tlefile',
type=str,
required=True,
help='File containing TLE data')
parser.add_argument('-w',
'--where',
type=str,
required=True,
help="'Where' clause to select hotspots")
parser.add_argument('-H',
'--hotspots',
type=str,
default='hotspots',
help="Hotspot table name")
parser.add_argument(
'-s',
'--suffix',
type=str,
required=True,
help="Suffix to append to 'hotspots' to get output table name")
parser.add_argument('-D',
'--drop-table',
action='store_true',
help='Drop output table if it exists')
parser.add_argument('--logfile',
type=str,
help="Logfile, default is 'hotspots'_'suffix'.log",
private=True)
parser.add_argument('--no-logfile',
action='store_true',
help='Do not output descriptive comments')
args = parser.parse_args(arglist)
if not args.no_logfile:
if not args.logfile:
args.logfile = args.hotspots + '_' + args.suffix + '.log'
if os.path.exists(args.logfile):
shutil.move(args.logfile,
args.logfile.split('/')[-1].rsplit('.', 1)[0] + '.bak')
logfile = open(args.logfile, 'w')
parser.write_comments(args,
logfile,
incomments=ArgumentHelper.separator())
logfile.close()
satcodes = {'N': 37849, 'Terra': 25994, 'Aqua': 27424}
tledict = {}
for norad_id in satcodes.values():
tledict[norad_id] = ()
tlefile = open(args.tlefile, 'r')
line1 = tlefile.readline().rstrip()
while len(line1) > 1:
norad_id = int(line1[2:7])
year2d = int(line1[18:20])
daynum = float(line1[20:32])
tledate = datetime(2000 + year2d if year2d <= 56 else 1900 + year2d, 1,
1) + timedelta(days=daynum)
line2 = tlefile.readline().rstrip()
tledict[norad_id] += ((tledate, line1, line2), )
line1 = tlefile.readline().rstrip()
psqlin = subprocess.Popen([
'psql', args.database, args.user, '--quiet', '--command',
r'\timing off', '--command',
r'\copy (SELECT * FROM ' + args.hotspots + ' WHERE ' + args.where +
' ORDER BY acq_date + acq_time) TO STDOUT CSV HEADER'
],
stdout=subprocess.PIPE,
encoding='UTF-8')
satcsv = csv.DictReader(psqlin.stdout)
psqlout = subprocess.Popen([
'psql', args.database, args.user, '--quiet', '--command',
r'\timing off'
] + ([
'--command', 'DROP TABLE IF EXISTS ' + args.hotspots + '_' +
args.suffix
] if args.drop_table else []) + [
'--command', 'CREATE TABLE ' + args.hotspots + '_' + args.suffix +
' AS TABLE ' + args.hotspots + ' WITH NO DATA', '--command',
'ALTER TABLE ' + args.hotspots + '_' + args.suffix + ' \
ADD COLUMN pass_azimuth NUMERIC(8,5), \
ADD COLUMN pass_elevation NUMERIC(8,5), \
ADD COLUMN pass_bearing NUMERIC(8,5), \
ADD COLUMN pass_datetime TIMESTAMP WITHOUT TIME ZONE, \
ADD COLUMN prev_azimuth NUMERIC(8,5), \
ADD COLUMN prev_elevation NUMERIC(8,5), \
ADD COLUMN prev_datetime TIMESTAMP WITHOUT TIME ZONE, \
ADD COLUMN next_azimuth NUMERIC(8,5), \
ADD COLUMN next_elevation NUMERIC(8,5), \
ADD COLUMN next_datetime TIMESTAMP WITHOUT TIME ZONE, \
DROP COLUMN IF EXISTS geometry, \
ADD COLUMN geometry geometry GENERATED ALWAYS AS (ST_Rotate(ST_MakeEnvelope((ST_X(ST_Transform(ST_SetSRID(ST_MakePoint((longitude)::DOUBLE PRECISION, (latitude)::DOUBLE PRECISION), 4326), 28350)) - ((scan * (500)::NUMERIC))::DOUBLE PRECISION), (ST_Y(ST_Transform(ST_SetSRID(ST_MakePoint((longitude)::DOUBLE PRECISION, (latitude)::DOUBLE PRECISION), 4326), 28350)) - ((track * (500)::NUMERIC))::DOUBLE PRECISION), (ST_X(ST_Transform(ST_SetSRID(ST_MakePoint((longitude)::DOUBLE PRECISION, (latitude)::DOUBLE PRECISION), 4326), 28350)) + ((scan * (500)::NUMERIC))::DOUBLE PRECISION), (ST_Y(ST_Transform(ST_SetSRID(ST_MakePoint((longitude)::DOUBLE PRECISION, (latitude)::DOUBLE PRECISION), 4326), 28350)) + ((track * (500)::NUMERIC))::DOUBLE PRECISION), 28350), ((((- pass_bearing) * 3.1415926) / (180)::NUMERIC))::DOUBLE PRECISION, ST_Transform(ST_SetSRID(ST_MakePoint((longitude)::DOUBLE PRECISION, (latitude)::DOUBLE PRECISION), 4326), 28350))) STORED',
'--command', r'\copy ' + args.hotspots + '_' + args.suffix +
' FROM STDIN CSV HEADER', '--command',
'ALTER TABLE ' + args.hotspots + '_' + args.suffix + ' \
ADD COLUMN id SERIAL'
],
stdin=subprocess.PIPE,
encoding='UTF-8')
satout = csv.DictWriter(
psqlout.stdin,
fieldnames=satcsv.fieldnames + [
'pass_azimuth', 'pass_elevation', 'pass_bearing', 'pass_datetime',
'prev_azimuth', 'prev_elevation', 'prev_datetime', 'next_azimuth',
'next_elevation', 'next_datetime'
])
minelevation = 90
tleindexes = {}
lastdatetime = datetime(MINYEAR, 1, 1)
lastline1 = None
lastline2 = None
inrowcount = 0
for satline in satcsv:
thisdatetime = dateparser.parse(satline['acq_date'] + ' ' +
satline['acq_time'])
satcode = satcodes[satline['satellite']]
tletuples = tledict[satcode]
tleidx = tleindexes.get(satcode, 0)
assert (thisdatetime >= lastdatetime)
lastdatetime = thisdatetime
while tletuples[tleidx + 1][0] <= thisdatetime - timedelta(hours=12):
tleidx += 1
tleindexes[satcode] = tleidx
tletuple = tletuples[tleidx]
line1 = tletuple[1]
line2 = tletuple[2]
if line1 != lastline1 or line2 != lastline2:
orb = Orbital("", line1=line1, line2=line2)
lastline1 = line1
lastline2 = line2
passdatetimes = [
next_pass[2]
for next_pass in orb.get_next_passes(thisdatetime -
timedelta(hours=24),
48,
float(satline['longitude']),
float(satline['latitude']),
0,
horizon=0)
]
nearpasses = []
leastoffset = 999999
leastoffsetidx = None
for passidx in range(len(passdatetimes)):
max_elevation_time = passdatetimes[passidx]
(azimuth,
elevation) = orb.get_observer_look(max_elevation_time,
float(satline['longitude']),
float(satline['latitude']), 0)
thisoffset = (max_elevation_time - thisdatetime).total_seconds()
if abs(thisoffset) < abs(leastoffset):
leastoffsetidx = len(nearpasses)
leastoffset = thisoffset
nearpasses += [(max_elevation_time, azimuth, elevation)]
if abs(leastoffset) > 600:
print("WARNING: offset=", leastoffset, "prev offset=",
(nearpasses[leastoffsetidx - 1][0] -
thisdatetime).total_seconds() if leastoffsetidx > 0 else "",
"next offset=", (nearpasses[leastoffsetidx + 1][0] -
thisdatetime).total_seconds()
if leastoffsetidx < len(nearpasses) - 1 else "",
" satellite ", satline['satellite'])
#print(" ", satline)
if len(nearpasses):
nearestpass = nearpasses[leastoffsetidx]
satline['pass_datetime'] = nearestpass[0]
satline['pass_azimuth'] = nearestpass[1]
satline['pass_elevation'] = nearestpass[2]
(lon1, lat1, alt1) = orb.get_lonlatalt(max_elevation_time -
timedelta(seconds=30))
(lon2, lat2, alt2) = orb.get_lonlatalt(max_elevation_time +
timedelta(seconds=30))
point1 = (lon1, lat1)
point2 = (lon2, lat2)
bearing = sphere.bearing(point1, point2)
satline['pass_bearing'] = bearing
if leastoffsetidx > 0:
prevpass = nearpasses[leastoffsetidx - 1]
satline['prev_datetime'] = prevpass[0]
satline['prev_azimuth'] = prevpass[1]
satline['prev_elevation'] = prevpass[2]
if leastoffsetidx < len(nearpasses) - 1:
nextpass = nearpasses[leastoffsetidx + 1]
satline['next_datetime'] = nextpass[0]
satline['next_azimuth'] = nextpass[1]
satline['next_elevation'] = nextpass[2]
satout.writerow(satline)
inrowcount += 1
if args.limit and inrowcount == args.limit:
break
def SatStats():
#tle = r"C:\Users\Jake\Python\TLE Files\stations-tle.txt"
# Download TLE file
#downloadUrl = "http://www.celestrak.com/NORAD/elements/stations.txt"
#urllib.request.urlretrieve(downloadUrl, tle)
tle = GetTLEFile()
stationList = GetStationList(tle)
try:
while (True):
stationNumber = input("Enter Station Number: ")
print()
if stationNumber == 'n':
for name in enumerate(stationList):
print(name[0], ':', name[1].replace('\n', ''))
print()
else:
break
stationNumber = int(stationNumber)
if stationNumber < len(stationList):
# Get Platform Object
station = stationList[stationNumber]
stationObject = tlefile.read(station, tle)
GoogleSearch(station)
# Print Platform Info
PrintTLEInfo(stationObject, station)
lon, lat, alt, now = GetGPSPosition(station, tle,
datetime.utcnow())
dmLon, dmLat = DegreeMinutes(lon, lat)
print("Current GPS location:\n",
"Latitude: ",
lat,
" Longitude: ",
lon,
" Altitude (km): ",
alt,
sep='')
print("Current GPS location:\n",
"Latitude: ",
dmLat,
" Longitude: ",
dmLon,
" Altitude (km): ",
alt,
sep='')
satOrb = Orbital(station, tle)
print()
PrintFreqData(
GetFreqData(
station,
"C:/Users/Jake/Python/Satellite Tracker/frequencies/satfreqlist.csv"
))
passes = satOrb.get_next_passes(datetime.utcnow(), 120,
-90.5546910, 38.6475290, 180.85)
print("Next passes in 5 days (Max Elevation Above 20 deg):")
for eachPass in passes:
rise = eachPass[0]
fall = eachPass[1]
apex = eachPass[2]
# Lon, Lat
obsRiseAngle, obsRiseElv = satOrb.get_observer_look(
rise, -90.5546910, 38.6475290, 180.85)
obsFallAngle, obsFallElv = satOrb.get_observer_look(
fall, -90.5546910, 38.6475290, 180.85)
obsApexAngle, obsApexElv = satOrb.get_observer_look(
apex, -90.5546910, 38.6475290, 180.85)
if obsApexElv >= 20.0:
print("Rise Time:", rise, "Azimuth:",
round(obsRiseAngle, 2), '(',
AzimuthDirection(obsRiseAngle), ')', "Elevation:",
abs(round(obsRiseElv, 2)))
print("Apex Time:", apex, "Azimuth:",
round(obsApexAngle, 2), '(',
AzimuthDirection(obsApexAngle), ')', "Elevation:",
abs(round(obsApexElv, 2)))
print("Fall Time:", fall, "Azimuth:",
round(obsFallAngle, 2), '(',
AzimuthDirection(obsFallAngle), ')', "Elevation:",
abs(round(obsFallElv, 2)))
print()
except:
pass
class FileStreamer(FileSystemEventHandler):
"""Get the updates from files.
TODO: separate holder from file handling.
"""
def __init__(self, holder, configfile, *args, **kwargs):
FileSystemEventHandler.__init__(self, *args, **kwargs)
self._file = None
self._filename = ""
self._where = 0
self._satellite = ""
self._orbital = None
cfg = ConfigParser()
cfg.read(configfile)
self._coords = cfg.get("local_reception", "coordinates").split(" ")
self._coords = [float(self._coords[0]),
float(self._coords[1]),
float(self._coords[2])]
logger.debug(self._coords)
try:
self._tle_files = cfg.get("local_reception", "tle_files")
except NoOptionError:
self._tle_files = None
self._file_pattern = cfg.get("local_reception", "file_pattern")
self.scanlines = holder
def on_created(self, event):
if event.src_path != self._filename:
logger.debug("Closing: " + self._filename)
if self._file:
self._file.close()
self._file = None
self._filename = ""
self._where = 0
self._satellite = ""
logger.debug("Creating: " + event.src_path)
def on_opened(self, event):
fname = os.path.split(event.src_path)[1]
if self._file is None and fnmatch(fname, self._file_pattern):
logger.debug("Opening: " + event.src_path)
self._filename = event.src_path
self._file = open(event.src_path, "rb")
self._where = 0
self._satellite = " ".join(event.src_path.split("_")[1:3])[:-5]
if self._tle_files is not None:
filelist = glob(self._tle_files)
tle_file = max(filelist, key=lambda x: os.stat(x).st_mtime)
else:
tle_file = None
self._orbital = Orbital(self._satellite, tle_file)
def on_modified(self, event):
self.on_opened(event)
if event.src_path != self._filename:
return
self._file.seek(self._where)
line = self._file.read(LINE_SIZE)
while len(line) == LINE_SIZE:
line_start = self._where
self._where = self._file.tell()
dtype = np.dtype([('frame_sync', '>u2', (6, )),
('id', [('id', '>u2'),
('spare', '>u2')]),
('timecode', '>u2', (4, )),
('telemetry', [("ramp_calibration", '>u2', (5, )),
("PRT", '>u2', (3, )),
("ch3_patch_temp", '>u2'),
("spare", '>u2'),]),
('back_scan', '>u2', (10, 3)),
('space_data', '>u2', (10, 5)),
('sync', '>u2'),
('TIP_data', '>u2', (520, )),
('spare', '>u2', (127, )),
('image_data', '>u2', (2048, 5)),
('aux_sync', '>u2', (100, ))])
array = np.fromstring(line, dtype=dtype)
if np.all(abs(HRPT_SYNC_START -
array["frame_sync"]) > 1):
array = array.newbyteorder()
# FIXME: this is bad!!!! Should not get the year from the filename
year = int(os.path.split(event.src_path)[1][:4])
utctime = datetime(year, 1, 1) + timecode(array["timecode"][0])
# Check that we receive real-time data
if not (np.all(array['aux_sync'] == HRPT_SYNC) and
np.all(array['frame_sync'] == HRPT_SYNC_START)):
logger.info("Garbage line: " + str(utctime))
line = self._file.read(LINE_SIZE)
continue
elevation = self._orbital.get_observer_look(utctime, *self._coords)[1]
logger.info("Got line " + utctime.isoformat() + " "
+ self._satellite + " "
+ str(elevation))
# TODO:
# - serve also already present files
# - timeout and close the file
self.scanlines.add_scanline(self._satellite, utctime,
elevation, line_start, self._filename,
line)
line = self._file.read(LINE_SIZE)
self._file.seek(self._where)
def get_site_passes(
satno, site, duration, filename
): # Duration in hours from current time, # filename = file with TLEs in it
now = datetime.utcnow() # set time to current time
sat = Orbital(satellite='None',
line1=getTLE(satno, filename)[0],
line2=getTLE(satno, filename)[1])
x = Orbital.get_next_passes(
sat,
now,
duration,
site[1],
site[0],
site[2],
tol=0.001,
horizon=site[3]) # builds list of all passes that break 3 degrees
passes = [] # begins empty list for passes
for i in x:
en = Orbital.get_observer_look(sat, i[0], site[1], site[0],
site[2]) # Gets entry Az & El
ex = Orbital.get_observer_look(sat, i[1], site[1], site[0],
site[2]) # Gets exitAz & El
hi = Orbital.get_observer_look(sat, i[2], site[1], site[0],
site[2]) # Gets exitAz & El
p1 = Orbital.get_observer_look(sat, i[0], site[1], site[0],
site[2])[0] # az at 3 degree entry
p2 = Orbital.get_observer_look(sat, i[0] + timedelta(seconds=1),
site[1], site[0],
site[2])[0] # p1 1 seconds later
p3 = Orbital.get_observer_look(sat, i[1], site[1], site[0],
site[2])[0] # az at 3 degree exit
print(site[8], "Pass Start:", i[0], "Enter Az", en[0], "Pass Term:",
i[1], "Exit Az:", ex[0], "MaxEl:",
hi[1]) # prints passes (used for dev)
if site[4] < en[0] < site[5] or site[6] < en[0] < site[
7]: # if satellite enters FOV on face *checkpass*
len = int(
(i[1] - i[0]).total_seconds()) # length of pass in seconds
passes.append(
i[0]
) # appedns check passes to passes list print("Check Pass | Az:", en[0]) # prints pass info (used for dev)
elif not site[4] < en[0] < site[5]: # if enters FOV not on face1
print("Fence Pass | Az:", ex[0]) # prints pass info (used for dev)
if (p1 - p2) < 0: # if the azimuth is growing after 5 seconds
rx = i[
0] # Sets variables so it doesn't mess up other operations
while p1 <= site[
6]: # looks for when azimuth breaches sides of coverage
p1 = Orbital.get_observer_look(
sat, rx, site[1], site[0],
site[2])[0] # gets new azimuth
rx = rx + timedelta(
seconds=10
) # sets time for 10s later to retrieve azimuth at that time
print("Fence Time:", rx, "Angle:",
p1) # prints pass info (used for dev)
len = int((i[1] - rx).total_seconds())
passes.append(rx)
if (p1 - p2) > 0: # if the azimuth is shrinking after 5 seconds
rx = i[
0] # Sets variables so it doesn't mess up other operations
while p1 >= site[
6]: # looks for when azimuth breaches sides of coverage
p1 = Orbital.get_observer_look(
sat, rx, site[1], site[0],
site[2])[0] # gets new azimuth
rx = rx + timedelta(seconds=10)
print("Fence Time:", rx, "Angle:",
p1) # prints passe info (used for dev)
len = int((i[1] - rx).total_seconds())
passes.append(rx) # appedns check passes to passes list
elif not site[6] < en[0] < site[7]: # if enters FOV not on face2
print("Fence Pass | Az:", ex[0]) # prints pass info (used for dev)
if (p1 - p2) < 0: # if the azimuth is growing after 5 seconds
rx = i[
0] # Sets variables so it doesn't mess up other operations
while p1 <= site[
6]: # looks for when azimuth breaches sides of coverage
p1 = Orbital.get_observer_look(
sat, rx, site[1], site[0],
site[2])[0] # gets new azimuth
rx = rx + timedelta(
seconds=10
) # sets time for 10s later to retrieve azimuth at that time
print("Fence Time:", rx, "Angle:",
p1) # prints pass info (used for dev)
len = int((i[1] - rx).total_seconds())
passes.append(rx) # appedns check passes to passes list
if (p1 - p2) > 0: # if the azimuth is shrinking after 5 seconds
rx = i[
0] # Sets variables so it doesn't mess up other operations
while p1 >= site[
6]: # looks for when azimuth breaches sides of coverage
p1 = Orbital.get_observer_look(
sat, rx, site[1], site[0],
site[2])[0] # gets new azimuth
rx = rx + timedelta(
seconds=10
) # sets time for 10s later to retrieve azimuth at that time
print("Fence Time:", rx, "Angle:",
p1) # prints pass info (used for dev)
len = int((i[1] - rx).total_seconds())
passes.append(rx) # appedns check passes to passes list
if len < 0:
print("Not a Pass")
elif len < 180:
print("Pass Length: ", len, "sec (short)")
else:
print("Pass Length: ", len, "sec")
return passes # Returns datetime objects for all passes
def parseISSTLEFile():
orb = Orbital("iss (zarya)", tle_filename)
utc_time = datetime.utcnow()
return orb.get_lonlatalt(utc_time) + orb.get_observer_look(
utc_time, location[0], location[1], 0)
lat, lon, alt = 29.76, -95.36, 0
lat_rad = math.radians(lat)
lon_rad = math.radians(lon)
R_ECEF_to_NED = np.matrix([
[-math.sin(lat_rad)*math.cos(lon_rad), -math.sin(lat_rad)*math.sin(lon_rad), math.cos(lat_rad)],
[-math.sin(lon_rad), math.cos(lon_rad), 0 ],
[-math.cos(lat_rad)*math.cos(lon_rad), -math.cos(lat_rad)*math.sin(lon_rad), -math.sin(lat_rad)]
])
#iss_sat_num = 25544
orb = Orbital('ISS (ZARYA)')
now = datetime.utcnow()
look = orb.get_observer_look(now, lon, lat, alt) # NOTE: lon is first, lat is second!
iss_llh = orb.get_lonlatalt(now)
print("ISS (lat lon alt) = ({}, {}, {})".format(iss_llh[1], iss_llh[0], iss_llh[2]))
print('ISS is {} deg east of north and {} degrees above the horizon'.format(look[0], look[1]))
#print(astronomy.sun_zenith_angle(now, lon, lat))
iss_pos_m = lat_lon_to_ecef(iss_llh[1], # lat
iss_llh[0], # lon
earth_rad_m+(iss_llh[2]*1000)) # height (m) (need to cvt km to m)
obs_pos_m = lat_lon_to_ecef(lat, lon)
print('ECEF pos: {} m'.format(iss_pos_m))
print('obs ECEF pos: {} m'.format(obs_pos_m))
TLE_FILE_NAME = 'cubesat.txt'
ALTITUDE_ASL = 0
LAT = 64.146
LONG = 21.942
passhour = 0
while passhour < 24:
# set the date with a variable for the hour
d = datetime(2020, 5, 9, passhour, 0, 0)
orb = Orbital('CUBESAT', 'cubesat.txt')
# generate pass information for the hour specified
passes = orb.get_next_passes(d, 1, LONG, LAT, ALTITUDE_ASL, horizon=1)
# if there is no pass for the current value of passhour, the length will be zero
if len(passes) > 0:
rise_az, rise_el = orb.get_observer_look(passes[0][0], LONG, LAT,
ALTITUDE_ASL)
transit_az, transit_el = orb.get_observer_look(passes[0][2], LONG, LAT,
ALTITUDE_ASL)
set_az, set_el = orb.get_observer_look(passes[0][1], LONG, LAT,
ALTITUDE_ASL)
# print out the pass info
print("CUBESAT")
print(passes[0][0], rise_az, rise_el)
print(passes[0][2], transit_az, transit_el)
print(passes[0][1], set_az, set_el)
print()
# use datetime.strptime() to split the pass time into its componenet parts
# set the hour of the current pass
passtring = datetime.strptime(str(passes[0][0]),
'%Y-%m-%d %H:%M:%S.%f')
class InviewCalculator:
"""Class to compute inviews above a specified elevation angle from a latitude, longitude, elevation to a satellite (number) """
# Constructor
def __init__(self, ground_station, satellite_tle):
"""Constructor: ground station as GroundStation, satellite TLE as TleManipulator"""
self.__ground_station = ground_station
self.__satellite_tle = satellite_tle
self.__orb = Orbital(str(self.__satellite_tle.get_satellite_number()), \
line1=self.__satellite_tle.get_line1(), \
line2=self.__satellite_tle.get_line2())
# Member functions
def __repr__(self):
"""Returns a string representing an instance of this class."""
out = 'Inview Calculator:\n' \
'latitude=%f, longitude=%f, elevation=%f, ' \
'minimum elevation angle=%s, satellite TLE=\n%s' % \
(self.__ground_station.get_latitude(), self.__ground_station.get_longitude(), self.__ground_station.get_minimum_elevation_angle(), \
self.__ground_station.get_minimum_elevation_angle(), self.__satellite_tle)
return out
def compute_inviews(self, in_start_time, in_end_time):
"""Method to compute inviews (in UTC) for the initialized location, elevation angle, and satellite over a specified time period. Returns a list of inview start/stop times, accurate to the nearest second and using the latest available TLE when the method is called."""
# NOTE: pyorbital EXPECTS naive date/times and interprets them
# as UTC... so we need to satisfy it; however, we are making this
# module DATETIME AWARE, so RETURN VALUES are DATETIME AWARE!!
# Also, all naive inputs are assumed to be UTC and all aware inputs
# are converted to UTC (and then made naive)
if (in_start_time.tzinfo is not None):
temp = in_start_time.astimezone(UTC)
start_time = datetime(temp.year, temp.month, temp.day, \
temp.hour, temp.minute, temp.second)
else:
start_time = in_start_time
if (in_end_time.tzinfo is not None):
temp = in_end_time.astimezone(UTC)
end_time = datetime(temp.year, temp.month, temp.day, \
temp.hour, temp.minute, temp.second)
else:
end_time = in_end_time
# start_time, end_time are now naive
inviews = []
time = start_time
up = 0
el_increasing = 0
maxel = 0
try:
(az, el) = self.__orb.get_observer_look(time, self.__ground_station.get_longitude(), \
self.__ground_station.get_latitude(), \
self.__ground_station.get_minimum_elevation_angle())
if (el > self.__ground_station.get_minimum_elevation_angle()):
# start the first inview at the input start_time
up = 1
el_increasing = 1
rising = time
# Step through time, looking for inview starts and ends
while (time < end_time):
(az, el) = self.__orb.get_observer_look(time, self.__ground_station.get_longitude(), \
self.__ground_station.get_latitude(), \
self.__ground_station.get_minimum_elevation_angle())
if (el > self.__ground_station.get_minimum_elevation_angle()
) and (up == 0):
rising = self.__find_exact_crossing(time, up)
el_increasing = 1
up = 1
if (el < self.__ground_station.get_minimum_elevation_angle()
) and (up == 1):
# make sure to append AWARE datetimes
crossing = self.__find_exact_crossing(time, up)
inviews.append((rising.replace(tzinfo=UTC), \
crossing.replace(tzinfo=UTC), \
maxel))
el_increasing = 0
up = 0
maxel = 0
if (el > self.__ground_station.get_minimum_elevation_angle()):
if (el > maxel):
maxel = el
elif (
el_increasing
): # First point after el starts decreasing... find the exact max el
el_increasing = 0
maxel = self.__find_exact_maxel(time, maxel)
time += self.__oneminute
if (up == 1):
# end the last inview at the input end_time
# make sure to append AWARE datetimes
inviews.append((rising.replace(tzinfo=UTC), \
end_time.replace(tzinfo=UTC), \
maxel))
return inviews
except NotImplementedError: # Does not seem to work?
print("NotImplementedError computing inviews. Date/time = %s-%s-%sT%s:%s:%s, satellite number = %s" % \
(time.year, time.month, time.day, time.hour, time.minute, time.second, self.__satellite_tle.get_satellite_number()))
sys.stdout.flush()
raise
except: # Does not seem to work?
print("Unknown exception computing inviews. Date/time = %s-%s-%sT%s:%s:%s, satellite number = %s" % \
(time.year, time.month, time.day, time.hour, time.minute, time.second, self.__satellite_tle.get_satellite_number()))
sys.stdout.flush()
raise
def print_inviews(self, inviews):
"""Method to print a table of inviews... assumes that inviews contains the data for such a table"""
for iv in inviews:
print("Rise: %s, Set: %s, Maximum Elevation: %f" %
(iv[0], iv[1], iv[2]))
def compute_azels(self, in_start_time, in_end_time, time_step_seconds):
"""Method to compute az/el angles at time_step intervals during the input time period, INDEPENDENT of whether the satellite is actually in view """
# NOTE: pyorbital EXPECTS naive date/times and interprets them
# as UTC... so we need to satisfy it; however, we are making this
# module DATETIME AWARE, so RETURN VALUES are DATETIME AWARE!!
# Also, all naive inputs are assumed to be UTC and all aware inputs
# are converted to UTC (and then made naive)
if (in_start_time.tzinfo is not None):
temp = in_start_time.astimezone(UTC)
start_time = datetime(temp.year, temp.month, temp.day, \
temp.hour, temp.minute, temp.second)
else:
start_time = in_start_time
if (in_end_time.tzinfo is not None):
temp = in_end_time.astimezone(UTC)
end_time = datetime(temp.year, temp.month, temp.day, \
temp.hour, temp.minute, temp.second)
else:
end_time = in_end_time
# start_time, end_time are now naive
try:
delta = timedelta(seconds=time_step_seconds)
except:
delta = timedelta(seconds=60)
azels = []
time = start_time
# Naively compute the table... i.e. compute time, az, el for the
# input duration at each time step... no matter whether the satellite
# is really inview or not!
while (time < end_time + delta):
(az, el) = self.__orb.get_observer_look(time, self.__ground_station.get_longitude(), \
self.__ground_station.get_latitude(), \
self.__ground_station.get_minimum_elevation_angle())
range_km = self.__compute_range(time)
outtime = time.replace(tzinfo=UTC) # time is unmodified!
azels.append((outtime, az, el, range_km))
time += delta
return azels
def __compute_range(self, utc_time):
"""Method to compute range in kilometers from observer to satellite at *naive* UTC time utc_time"""
# N.B. pyorbital works in kilometers
(pos_x, pos_y,
pos_z), (vel_x, vel_y,
vel_z) = self.__orb.get_position(utc_time, normalize=False)
(opos_x, opos_y, opos_z), (ovel_x, ovel_y, ovel_z) = astronomy.observer_position(utc_time, \
self.__ground_station.get_longitude(), self.__ground_station.get_latitude(), self.__ground_station.get_elevation_in_meters()/1000.0)
dx = pos_x - opos_x
dy = pos_y - opos_y
dz = pos_z - opos_z
return math.sqrt(dx * dx + dy * dy + dz * dz) # km
# up is what it is **before** the crossing
def __find_exact_crossing(self, time, up):
"""Private method to refine an in view/out of view crossing time from the nearest minute to the nearest second."""
exacttime = time
# The crossing occurred in the minute before now... search backwards
# for the exact second of crossing
for j in range(0, 60):
exacttime -= self.__onesecond
(az, el) = self.__orb.get_observer_look(exacttime, \
self.__ground_station.get_longitude(), \
self.__ground_station.get_latitude(), \
self.__ground_station.get_minimum_elevation_angle())
if ((el > self.__ground_station.get_minimum_elevation_angle()) and (up == 1)) or \
((el < self.__ground_station.get_minimum_elevation_angle()) and (up == 0)):
break
return exacttime
def __find_exact_maxel(self, time, maxel):
"""Private method to refine the maximum elevation from occuring at the nearest minute to the nearest second."""
exacttime = time
# The maximum elevation occurred in the **two** minutes before now... search backwards
# for the exact second of maximum elevation
for j in range(0, 120):
exacttime -= self.__onesecond
(az, el) = self.__orb.get_observer_look(exacttime, \
self.__ground_station.get_longitude(), \
self.__ground_station.get_latitude(), \
self.__ground_station.get_minimum_elevation_angle())
if (el > maxel):
maxel = el
return maxel
# Class member constants
__onesecond = timedelta(seconds=1)
__oneminute = timedelta(minutes=1)
tle = tlefile.read(satellite, None, line1, line2)
orb = Orbital(satellite, None, line1, line2)
now = datetime.utcnow()
# Get normalized position and velocity of the satellite:
pos, vel = orb.get_position(now)
# Get longitude, latitude and altitude of the satellite:
position = orb.get_lonlatalt(now)
data = {}
timestamp = calendar.timegm(now.utctimetuple())
az, el = orb.get_observer_look(now, userLng, userLat, userAlt);
data['user_view'] = {}
data['user_view']['azimuth'] = az
data['user_view']['elevation'] = el
data['timestamp'] = timestamp
data['satellite'] = satellite
data['tle'] = {};
data['tle']['arg_perigee'] = orb.tle.arg_perigee
data['tle']['bstar'] = orb.tle.bstar
data['tle']['classification'] = orb.tle.classification
data['tle']['element_number'] = orb.tle.element_number
data['tle']['ephemeris_type'] = orb.tle.ephemeris_type
data['tle']['epoch'] = (orb.tle.epoch - datetime(1970, 1, 1)).total_seconds()
class FileStreamer(FileSystemEventHandler):
"""Get the updates from files.
TODO: separate holder from file handling.
"""
def __init__(self, holder, configfile, *args, **kwargs):
FileSystemEventHandler.__init__(self, *args, **kwargs)
self._file = None
self._filename = ""
self._where = 0
self._satellite = ""
self._orbital = None
cfg = ConfigParser()
cfg.read(configfile)
self._coords = cfg.get("local_reception", "coordinates").split(" ")
self._coords = [float(self._coords[0]),
float(self._coords[1]),
float(self._coords[2])]
self._station = cfg.get("local_reception", "station")
logger.debug("Station " + self._station +
" located at: " + str(self._coords))
try:
self._tle_files = cfg.get("local_reception", "tle_files")
except NoOptionError:
self._tle_files = None
self._file_pattern = cfg.get("local_reception", "file_pattern")
self.scanlines = holder
self._warn = True
def update_satellite(self, satellite):
"""Update satellite and renew the orbital instance.
"""
if satellite != self._satellite:
self._satellite = satellite
if self._tle_files is not None:
filelist = glob(self._tle_files)
tle_file = max(filelist, key=lambda x: os.stat(x).st_mtime)
else:
tle_file = None
self._orbital = Orbital(self._satellite.upper(), tle_file)
def on_created(self, event):
"""Callback when file is created.
"""
if event.src_path != self._filename:
if self._filename:
logger.info("Closing: " + self._filename)
if self._file:
self._file.close()
self._file = None
self._filename = ""
self._where = 0
self._satellite = ""
self._warn = True
logger.info("New file detected: " + event.src_path)
def on_opened(self, event):
"""Callback when file is opened
"""
fname = os.path.split(event.src_path)[1]
if self._file is None and fnmatch(fname, self._file_pattern):
logger.info("File opened: " + event.src_path)
self._filename = event.src_path
self._file = open(event.src_path, "rb")
self._where = 0
self._satellite = ""
self._orbital = None
self._warn = True
def on_modified(self, event):
self.on_opened(event)
if event.src_path != self._filename:
return
self._file.seek(self._where)
line = self._file.read(LINE_SIZE)
while len(line) == LINE_SIZE:
line_start = self._where
self._where = self._file.tell()
dtype = np.dtype([('frame_sync', '>u2', (6, )),
('id', [('id', '>u2'),
('spare', '>u2')]),
('timecode', '>u2', (4, )),
('telemetry', [("ramp_calibration", '>u2', (5, )),
("PRT", '>u2', (3, )),
("ch3_patch_temp", '>u2'),
("spare", '>u2'),]),
('back_scan', '>u2', (10, 3)),
('space_data', '>u2', (10, 5)),
('sync', '>u2'),
('TIP_data', '>u2', (520, )),
('spare', '>u2', (127, )),
('image_data', '>u2', (2048, 5)),
('aux_sync', '>u2', (100, ))])
array = np.fromstring(line, dtype=dtype)
if np.all(abs(HRPT_SYNC_START -
array["frame_sync"]) > 1):
array = array.newbyteorder()
# FIXME: this means server can only share 1 year of hrpt data.
now = datetime.utcnow()
year = now.year
utctime = datetime(year, 1, 1) + timecode(array["timecode"][0])
if utctime > now:
# Can't have data from the future... yet :)
utctime = (datetime(year - 1, 1, 1)
+ timecode(array["timecode"][0]))
# Check that we receive real-time data
if not (np.all(array['aux_sync'] == HRPT_SYNC) and
np.all(array['frame_sync'] == HRPT_SYNC_START)):
logger.info("Garbage line: " + str(utctime))
line = self._file.read(LINE_SIZE)
continue
if (now - utctime).days > 7 and self._warn:
logger.warning("Data is more than a week old: " + str(utctime))
self._warn = False
satellite = SATELLITES[((array["id"]["id"] >> 3) & 15)[0]]
self.update_satellite(satellite)
elevation = self._orbital.get_observer_look(utctime,
*self._coords)[1]
logger.debug("Got line " + utctime.isoformat() + " "
+ self._satellite + " "
+ str(elevation))
# TODO:
# - serve also already present files
# - timeout and close the file
self.scanlines.add_scanline(self._satellite, utctime,
elevation, line_start, self._filename,
line)
line = self._file.read(LINE_SIZE)
self._file.seek(self._where)
class FileStreamer(FileSystemEventHandler):
"""Get the updates from files.
TODO: separate holder from file handling.
"""
def __init__(self, holder, configfile, *args, **kwargs):
FileSystemEventHandler.__init__(self, *args, **kwargs)
self._file = None
self._filename = ""
self._where = 0
self._satellite = ""
self._orbital = None
cfg = ConfigParser()
cfg.read(configfile)
self._coords = cfg.get("local_reception", "coordinates").split(" ")
self._coords = [
float(self._coords[0]),
float(self._coords[1]),
float(self._coords[2])
]
self._station = cfg.get("local_reception", "station")
logger.debug("Station " + self._station + " located at: " +
str(self._coords))
try:
self._tle_files = cfg.get("local_reception", "tle_files")
except NoOptionError:
self._tle_files = None
self._file_pattern = cfg.get("local_reception", "file_pattern")
self.scanlines = holder
self._warn = True
def update_satellite(self, satellite):
"""Update satellite and renew the orbital instance.
"""
if satellite != self._satellite:
self._satellite = satellite
if self._tle_files is not None:
filelist = glob(self._tle_files)
tle_file = max(filelist, key=lambda x: os.stat(x).st_mtime)
else:
tle_file = None
self._orbital = Orbital(self._satellite.upper(), tle_file)
def on_created(self, event):
"""Callback when file is created.
"""
if event.src_path != self._filename:
if self._filename:
logger.info("Closing: " + self._filename)
if self._file:
self._file.close()
self._file = None
self._filename = ""
self._where = 0
self._satellite = ""
self._warn = True
logger.info("New file detected: " + event.src_path)
def on_opened(self, event):
"""Callback when file is opened
"""
fname = os.path.split(event.src_path)[1]
if self._file is None and fnmatch(fname, self._file_pattern):
logger.info("File opened: " + event.src_path)
self._filename = event.src_path
self._file = open(event.src_path, "rb")
self._where = 0
self._satellite = ""
self._orbital = None
self._warn = True
def on_modified(self, event):
self.on_opened(event)
if event.src_path != self._filename:
return
self._file.seek(self._where)
line = self._file.read(LINE_SIZE)
while len(line) == LINE_SIZE:
line_start = self._where
self._where = self._file.tell()
dtype = np.dtype([('frame_sync', '>u2', (6, )),
('id', [('id', '>u2'), ('spare', '>u2')]),
('timecode', '>u2', (4, )),
('telemetry', [
("ramp_calibration", '>u2', (5, )),
("PRT", '>u2', (3, )),
("ch3_patch_temp", '>u2'),
("spare", '>u2'),
]), ('back_scan', '>u2', (10, 3)),
('space_data', '>u2', (10, 5)), ('sync', '>u2'),
('TIP_data', '>u2', (520, )),
('spare', '>u2', (127, )),
('image_data', '>u2', (2048, 5)),
('aux_sync', '>u2', (100, ))])
array = np.fromstring(line, dtype=dtype)
if np.all(abs(HRPT_SYNC_START - array["frame_sync"]) > 1):
array = array.newbyteorder()
# FIXME: this means server can only share 1 year of hrpt data.
now = datetime.utcnow()
year = now.year
utctime = datetime(year, 1, 1) + timecode(array["timecode"][0])
if utctime > now:
# Can't have data from the future... yet :)
utctime = (datetime(year - 1, 1, 1) +
timecode(array["timecode"][0]))
# Check that we receive real-time data
if not (np.all(array['aux_sync'] == HRPT_SYNC)
and np.all(array['frame_sync'] == HRPT_SYNC_START)):
logger.info("Garbage line: " + str(utctime))
line = self._file.read(LINE_SIZE)
continue
if (now - utctime).days > 7 and self._warn:
logger.warning("Data is more than a week old: " + str(utctime))
self._warn = False
satellite = SATELLITES[((array["id"]["id"] >> 3) & 15)[0]]
self.update_satellite(satellite)
elevation = self._orbital.get_observer_look(
utctime, *self._coords)[1]
logger.debug("Got line " + utctime.isoformat() + " " +
self._satellite + " " + str(elevation))
# TODO:
# - serve also already present files
# - timeout and close the file
self.scanlines.add_scanline(self._satellite, utctime, elevation,
line_start, self._filename, line)
line = self._file.read(LINE_SIZE)
self._file.seek(self._where)
eph.compute(ephObserver)
data = {}
data['next_pass'] = {}
data['next_pass']['until'] = "%d" % round((rt - ephemNow) * 3600 * 24)
data['next_pass']['rise_time'] = calendar.timegm(rt.datetime().utctimetuple())
data['next_pass']['transit_time'] = calendar.timegm(tt.datetime().utctimetuple())
data['next_pass']['set_time'] = calendar.timegm(st.datetime().utctimetuple())
data['next_pass']['rise_azimuth'] = "%5.1f" % math.degrees(razi)
data['next_pass']['max_elevation'] = "%5.1f" % math.degrees(televation)
data['next_pass']['set_azimuth'] = "%5.1f" % math.degrees(sazi)
# azimuth = eph.az
# elevation = eph.alt
azimuth, elevation = orb.get_observer_look(now, userLng, userLat, userAlt);
data['user_view'] = {}
data['user_view']['azimuth'] = azimuth
data['user_view']['elevation'] = elevation
data['timestamp'] = timestamp
data['satellite'] = satellite
data['tle'] = {};
data['tle']['first_line'] = line1
data['tle']['second_line'] = line2
data['tle']['arg_perigee'] = orb.tle.arg_perigee
data['tle']['bstar'] = orb.tle.bstar
data['tle']['classification'] = orb.tle.classification
data['tle']['element_number'] = orb.tle.element_number
tle = StringIO()
tle.write(amateur_file)
orb = Orbital(
"AO-7",
line1=
"1 07530U 74089B 19134.19581420 -.00000034 00000-0 67853-4 0 9992",
line2=
"2 07530 101.7410 102.2252 0012571 56.5062 14.6811 12.53638015 36076")
now = datetime.utcnow()
# arrayat=Orbital.get_observer_look(lon=120.77,lat=15.15,alt=0.020)
pprint(orb)
# >>> # Get longitude, latitude and altitude of the satellite: >>>
pprint(orb.get_lonlatalt(now))
passes = orb.get_next_passes(now, length=4, lon=120.77, lat=15.15, alt=0.02)
#
# Each Pass a tuple of 3, rise, set, max ele
#
start_pass = passes[0][0]
end_pass = passes[0][1]
min_elevation = 10
while (start_pass < end_pass):
sky_location = orb.get_observer_look(start_pass,
lon=120.77,
lat=15.15,
alt=0.02)
if sky_location[1] >= min_elevation:
print("Az {:6.2f} Ele {:6.2f} ".format(sky_location[0],
sky_location[1]))
start_pass = start_pass + timedelta(seconds=60)
print("Pass ended")
def get_satellite_geometry(startDateUTC,
lengthDays,
lon,
lat,
alt=0.0,
mission="Sentinel-2a",
tleFile="/data/tle/norad_resource_tle.txt"):
"""Calculate approximate geometry for Sentinel overpasses.
Approximate because it assumes maximum satellite elevation
is the time at which target is imaged.
:param startDateUTC: a datetime object specifying when to start prediction.
:type startDateUTC: object
:param lengthDays: number of days over which to perform calculations.
:type lengthDays: int
:param lat: latitude of target.
:type lat: float
:param lon: longitude of target.
:type lon: float
:param alt: altitude of target (in km).
:type alt: float
:param mission: mission name as in TLE file.
:type mission: str
:param tleFile: TLE file.
:type tleFile: str
:return: a python list containing instances of the sensorGeometry class arranged in date order.
:rtype: list
"""
orb = Orbital(mission, tleFile)
passes = orb.get_next_passes(startDateUTC, 24 * lengthDays, lon, lat, alt)
geom_inst = SensorGeometry()
geom_inst.date_utc = []
geom_inst.vza = []
geom_inst.vaa = []
geom_inst.sza = []
geom_inst.saa = []
for p in passes:
look = orb.get_observer_look(p[2], lon, lat, alt)
vza = 90 - look[1]
vaa = look[0]
sza = ast.sun_zenith_angle(p[2], lon, lat)
saa = np.rad2deg(ast.get_alt_az(p[2], lon, lat)[1])
if mission == 'Sentinel-1b':
if 75 < vaa < 105 and 20. < vza < 45.: # vaa usually [0, 180], testing observation times
geom_inst.date_utc.append(p[2])
geom_inst.vza.append(vza)
geom_inst.vaa.append(vaa)
geom_inst.sza.append(sza)
geom_inst.saa.append(saa)
elif mission == 'Sentinel-1a':
if 75 < vaa < 105 and 20. < vza < 45.: # vaa usually [0, 180], testing observation times
geom_inst.date_utc.append(p[2])
geom_inst.vza.append(vza)
geom_inst.vaa.append(vaa)
geom_inst.sza.append(sza)
geom_inst.saa.append(saa)
elif mission == 'Sentinel-2a':
if sza < 90 and vza < 10.3:
geom_inst.date_utc.append(p[2])
geom_inst.vza.append(vza)
geom_inst.vaa.append(vaa)
geom_inst.sza.append(sza)
geom_inst.saa.append(saa)
return geom_inst
class Test_NightFogLowStratusAlgorithm(unittest.TestCase):
def setUp(self):
# Load test data
inputs = np.dsplit(testdata_night, 14)
self.ir108 = inputs[0]
self.ir039 = inputs[1]
self.vis008 = inputs[2]
self.nir016 = inputs[3]
self.vis006 = inputs[4]
self.ir087 = inputs[5]
self.ir120 = inputs[6]
self.elev = inputs[7]
self.cot = inputs[8]
self.reff = inputs[9]
self.lwp = inputs[10]
self.lat = inputs[11]
self.lon = inputs[12]
self.cth = inputs[13]
self.time = datetime(2013, 11, 12, 6, 00, 00)
# METEOSAT-10 (MSG-3) TLE file from 01.08.2017
# http://celestrak.com/NORAD/elements/weather.txt
line1 = "1 38552U 12035B 17212.14216600 -.00000019 00000-0 00000-0 0 9998"
line2 = "2 38552 0.8450 357.8180 0002245 136.4998 225.6885 1.00275354 18379"
# Import TLE file
self.tle = tlefile.read('meteosat 10', line1=line1, line2=line2)
self.orbital = Orbital('meteosat 10',
line1=self.tle.line1,
line2=self.tle.line2)
# Compute satellite zenith angle
azi, ele = self.orbital.get_observer_look(self.time, self.lon,
self.lat, self.elev)
self.sza = ele
self.input = {
'ir108': self.ir108,
'ir039': self.ir039,
'lat': self.lat,
'lon': self.lon,
'time': self.time,
'plot': True,
'save': True,
'dir': '/tmp/FLS',
'resize': '5',
'sza': self.sza
}
inputs = np.dsplit(testdata_night2, 14)
self.ir108 = inputs[0]
self.ir039 = inputs[1]
self.vis008 = inputs[2]
self.nir016 = inputs[3]
self.vis006 = inputs[4]
self.ir087 = inputs[5]
self.ir120 = inputs[6]
self.elev = inputs[7]
self.cot = inputs[8]
self.reff = inputs[9]
self.lwp = inputs[10]
self.lat = inputs[11]
self.lon = inputs[12]
self.cth = inputs[13]
self.time = datetime(2013, 12, 1, 4, 00, 00)
self.input2 = {
'ir108': self.ir108,
'ir039': self.ir039,
'lat': self.lat,
'lon': self.lon,
'time': self.time,
'plot': True,
'save': True,
'dir': '/tmp/FLS',
'resize': '5',
'sza': self.sza
}
def tearDown(self):
pass
def test_nightfls_algorithm(self):
flsalgo = NightFogLowStratusAlgorithm(**self.input)
ret, mask = flsalgo.run()
self.assertEqual(flsalgo.ir108.shape, (141, 298))
self.assertEqual(ret.shape, (141, 298))
self.assertEqual(flsalgo.shape, (141, 298))
self.assertEqual(np.ma.is_mask(flsalgo.mask), True)
def test_nightfls_algorithm2(self):
flsalgo = NightFogLowStratusAlgorithm(**self.input2)
ret, mask = flsalgo.run()
self.assertEqual(flsalgo.ir108.shape, (141, 298))
self.assertEqual(ret.shape, (141, 298))
self.assertEqual(flsalgo.shape, (141, 298))
self.assertEqual(np.ma.is_mask(flsalgo.mask), True)
def test_nightfls_turningpoints_with_valley(self):
y = np.array([1, 2, 4, 7, 5, 2, 0, 2, 3, 4, 6])
flsalgo = NightFogLowStratusAlgorithm(**self.input)
tvalues, valleys = flsalgo.get_turningpoints(y)
self.assertEqual(tvalues[5], True)
self.assertEqual(tvalues[2], True)
self.assertEqual(np.sum(tvalues), 2)
self.assertEqual(np.alen(valleys), 1)
self.assertEqual(valleys, 0)
def test_nightfls_turningpoints_with_thres(self):
y = np.array([1, 2, 4, 7, 5, 2, 0, 2, 3, 4, 6])
x = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])
flsalgo = NightFogLowStratusAlgorithm(**self.input)
tvalues, thres = flsalgo.get_turningpoints(y, x)
self.assertEqual(tvalues[5], True)
self.assertEqual(tvalues[2], True)
self.assertEqual(np.sum(tvalues), 2)
self.assertEqual(np.alen(thres), 1)
self.assertEqual(thres, 7)
def test_nightfls_turningpoints_no_valley(self):
y = np.array([1, 2, 4, 7, 5, 2, 1, 1, 1, 0])
flsalgo = NightFogLowStratusAlgorithm(**self.input)
tvalues, valleys = flsalgo.get_turningpoints(y)
self.assertEqual(tvalues[2], True)
self.assertEqual(np.sum(tvalues), 1)
self.assertEqual(np.alen(valleys), 0)
def test_nightfls_slope(self):
y = np.array([1, 2, 4, 7, 5, 2, 1, 1, 1, 0])
x = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
flsalgo = NightFogLowStratusAlgorithm(**self.input)
slope, thres = flsalgo.get_slope(y, x)
self.assertEqual(slope[2], 3)
self.assertEqual(slope[8], -1)
self.assertEqual(np.alen(slope), 9)
self.assertEqual(thres, 6)
current_time = datetime.utcfromtimestamp(time)
def pwm_for(az, el):
low = pwm_min
high = pwm_max
if (az > 180):
az -= 180
el = 180 - el
az_pwm = (az / 180) * (high - low) + low
el_pwm = (el / 180) * (high - low) + low
return az_pwm, el_pwm
delta = timedelta(seconds=step)
for i in range(duration):
az, el = orb.get_observer_look(current_time, lon, lat, 0)
paz, pel = (pwm_for(az, el))
res = (", ".join(
[str(time + i),
str(int(round(paz))),
str(int(round(pel)))]))
con.send(res.encode("utf8") + b"\n")
current_time += delta
con.send(b"\n")
print(con.recv(1024).decode("utf8"))