def getTECarray(pp,time,server="ftp://igs-final.man.olsztyn.pl/pub/gps_data/GPS_IONO/cmpcmb/",prefix="igsg",earth_rot=0,ionexPath="./"):
date_parms = PosTools.obtain_observation_year_month_day_fraction(time)
part_of_day= date_parms[3] * 24
#get relevant ionex file
ionexf=ionex.getIONEXfile(time=date_parms,server=server,prefix=prefix,outpath=ionexPath)
tecinfo=ionex.readTEC(ionexf)
vtecs=[]
for latpp,lonpp in zip(np.degrees(pp[:,1]),np.degrees(pp[:,0])):
vTEC=ionex.getTECinterpol(time=part_of_day,lat=latpp,lon=lonpp,tecinfo=tecinfo,apply_earth_rotation=earth_rot)
vtecs.append(vTEC)
return vtecs
def main(argv):
args = parser.parse_args(argv)
MS = args.MSfiles
server = args.server
prefix = args.prefix
(timerange, timestep, pointing, stat_names,
stat_pos) = PosTools.getMSinfo(MS)
start_time = timerange[0]
end_time = timerange[1]
timerange[0] = start_time - timestep
timerange[1] = end_time + timestep
times, timerange = PosTools.getIONEXtimerange(timerange, timestep)
if len(times[-1]) == 0 or times[-1][-1] < timerange[1]:
timestmp = list(times[-1])
timestmp.append(
timerange[1]
) #add one extra step to make sure you have a value for all times in the MS in case timestep hase been changed
times[-1] = np.array(timestmp)
for time_array in times[::
-1]: #check in reverse order, since datamight not be available for latest days
starttime = time_array[0]
date_parms = PosTools.obtain_observation_year_month_day_fraction(
starttime)
if not "http" in server: #ftp server use ftplib
ionexf = ionex.getIONEXfile(time=date_parms,
server=server,
prefix=prefix,
outpath=args.ionexpath)
else:
ionexf = ionex.get_urllib_IONEXfile(time=date_parms,
server=server,
prefix=prefix,
outpath=args.ionexpath)
if ionexf == -1:
if not "igsiono.uwm.edu.pl" in server:
logging.info(
"cannot get IONEX data, try fast product server instead")
server = "https://igsiono.uwm.edu.pl"
prefix = "igrg"
ionexf = ionex.get_urllib_IONEXfile(time=date_parms,
server=server,
prefix=prefix,
outpath=args.ionexpath)
if ionexf == -1:
logging.error(
"IONEX data not available, even not from fast product server"
)
return False
return True
def download_IONEX(ms_input,server="ftp://ftp.unibe.ch/aiub/CODE/",prefix='CODG',ionexPath="IONEXdata/"):
"""
Call getIONEX() once for every day that is covered by one of the input MSs
Parameters
----------
ms_input : list or str
list of MS filenames, or string with list, or single MS filename
server : str
URL of the server where the IONEX files can be found
prefix : str
prefix of the IONEX files
ionexPath : str
directory where to store the IONEX files
"""
mslist = input2strlist_nomapfile(ms_input)
if ionexPath[-1] != '/':
print "download_IONEX: ionexPath doesn't end in \"/\", adding that character."
ionexPath += '/'
dates_done = []
numfiles = len(mslist)
if numfiles>100:
printstat = True
else:
printstat = False
for (i,MS) in enumerate(mslist):
if printstat and (i+1)%100==0:
print "Working on file %d out of %d"%(i+1,numfiles)
obstable = pt.table(MS+'::OBSERVATION', ack=False)
time_range = obstable.col('TIME_RANGE')[0]
for timestamp in time_range:
date_parms = PosTools.obtain_observation_year_month_day_fraction(timestamp)
datestr = "%d-%0.2d-%0.2d" % date_parms[0:3]
if datestr not in dates_done:
print "Downloading IONEX file for:",datestr
ionexf=ionex.getIONEXfile(time=date_parms,server=server,prefix=prefix,outpath=ionexPath)
if type(ionexf) != str or not os.path.isfile(ionexf):
print "Failed to download IONEX file for date:",datestr
raise EnvironmentError
dates_done.append(datestr)
def getTECarray(
pp,
time,
server="ftp://igs-final.man.olsztyn.pl/pub/gps_data/GPS_IONO/cmpcmb/",
prefix="igsg",
earth_rot=0,
ionexPath="/home/users/mevius/IONEXdata/"):
date_parms = PosTools.obtain_observation_year_month_day_fraction(time)
part_of_day = date_parms[3] * 24
#get relevant ionex file
ionexf = ionex.getIONEXfile(time=date_parms,
server=server,
prefix=prefix,
outpath=ionexPath)
tecinfo = ionex.readTEC(ionexf)
vtecs = []
for latpp, lonpp in zip(np.degrees(pp[:, 1]), np.degrees(pp[:, 0])):
vTEC = ionex.getTECinterpol(time=part_of_day,
lat=latpp,
lon=lonpp,
tecinfo=tecinfo,
apply_earth_rotation=earth_rot)
vtecs.append(vTEC)
return np.array(vtecs)
def download_IONEX(ms_input,server="ftp://ftp.unibe.ch/aiub/CODE/",prefix='CODG',ionexPath="IONEXdata/"):
"""
Call getIONEX() once for every day that is covered by one of the input MSs
Parameters
----------
ms_input : list or str
list of MS filenames, or string with list, or single MS filename
server : str
URL of the server where the IONEX files can be found
prefix : str
prefix of the IONEX files
ionexPath : str
directory where to store the IONEX files
"""
mslist = input2strlist_nomapfile(ms_input)
dates_done = []
numfiles = len(mslist)
if numfiles>100:
printstat = True
else:
printstat = False
for (i,MS) in enumerate(mslist):
if printstat and (i+1)%100==0:
print "Working on file %d out of %d"%(i+1,numfiles)
obstable = pt.table(MS+'::OBSERVATION', ack=False)
time_range = obstable.col('TIME_RANGE')[0]
for timestamp in time_range:
date_parms = PosTools.obtain_observation_year_month_day_fraction(timestamp)
datestr = "%d-%0.2d-%0.2d" % date_parms[0:3]
if datestr not in dates_done:
print "Downloading IONEX file for:",datestr
ionexf=ionex.getIONEXfile(time=date_parms,server=server,prefix=prefix,outpath=ionexPath)
dates_done.append(datestr)
def main(MSfiles,
h5parmdb,
solset_name="sol000",
timestepRM=300,
ionex_server="ftp://ftp.aiub.unibe.ch/CODE/",
ionex_prefix='CODG',
ionexPath="./",
earth_rot=0,
proxyServer=None,
proxyPort=None,
proxyType=None,
proxyUser=None,
proxyPass=None):
'''Add rotation measure to existing h5parmdb
Args:
MSfiles (string) : path + filename of Measurement Set
h5parmdb (string) : name of existing h5parm
solset_name (string) : optional name of solset in h5parmdb,
if not set, first one will be chosen
timestep (float) : timestep in seconds
ionex_server (string) : ftp server for IONEX files
ionex_prefix (string) : prefix of IONEX files
ionexPath (string) : location where IONEX files are stored
earth_rot (float) : parameter to determine how much earth rotation is taken \
into account when interpolating IONEX data. (0 is none, 1 is full)
'''
try:
mslist = MSfiles.lstrip('[').rstrip(']').replace(' ', '').replace(
"'", "").split(',')
except AttributeError:
mslist = MSfiles
if len(mslist) == 0:
raise ValueError(
"Did not find any existing directory in input MS list!")
pass
else:
MS = mslist[0]
pass
if not os.path.exists(h5parmdb):
logging.error('Could not find h5parmdb: ' + h5parmdb)
return (1)
data = h5parm(h5parmdb, readonly=False)
if not solset_name in data.getSolsetNames():
makesolset(MS, data, solset_name)
solset = data.getSolset(solset_name)
soltabs = solset.getSoltabs()
station_names = sorted(solset.getAnt().keys())
if 'RMextract' in [s.name for s in soltabs]:
logging.warning('Soltab RMextract exists already. Skipping...')
return (0)
#extract the timerange information
(timerange, timestep, pointing, stat_names,
stat_pos) = PosTools.getMSinfo(MS)
start_time = timerange[0]
end_time = timerange[1]
timerange[0] = start_time - timestep
timerange[1] = end_time + timestep
times, timerange = PosTools.getIONEXtimerange(timerange, timestep)
if len(times[-1]) == 0 or times[-1][-1] < timerange[1]:
timestmp = list(times[-1])
timestmp.append(
timerange[1]
) #add one extra step to make sure you have a value for all times in the MS in case timestep hase been changed
times[-1] = np.array(timestmp)
for time_array in times[::
-1]: #check in reverse order, since datamight not be available for latest days
starttime = time_array[0]
date_parms = PosTools.obtain_observation_year_month_day_fraction(
starttime)
if not proxyServer:
if not "http" in ionex_server: #ftp server use ftplib
ionexf = ionex.getIONEXfile(time=date_parms,
server=ionex_server,
prefix=ionex_prefix,
outpath=ionexPath)
else:
ionexf = ionex.get_urllib_IONEXfile(time=date_parms,
server=ionex_server,
prefix=ionex_prefix,
outpath=ionexPath)
else:
ionexf = ionex.get_urllib_IONEXfile(time=date_parms,
server=ionex_server,
prefix=ionex_prefix,
outpath=ionexPath,
proxy_server=proxyServer,
proxy_type=proxyType,
proxy_port=proxyPort,
proxy_user=proxyUser,
proxy_pass=proxyPass)
if ionexf == -1:
if not "igsiono.uwm.edu.pl" in ionex_server:
logging.info(
"cannot get IONEX data, try fast product server instead")
if not proxyServer:
ionexf = ionex.get_urllib_IONEXfile(
time=date_parms,
server="https://igsiono.uwm.edu.pl",
prefix="igrg",
outpath=ionexPath)
else:
ionexf = ionex.get_urllib_IONEXfile(
time=date_parms,
server="https://igsiono.uwm.edu.pl",
prefix="igrg",
outpath=ionexPath,
proxy_server=proxyServer,
proxy_type=proxyType,
proxy_port=proxyPort,
proxy_user=proxyUser,
proxy_pass=proxyPass)
if ionexf == -1:
logging.error(
"IONEX data not available, even not from fast product server")
return (-1)
if not proxyServer:
rmdict = getRM.getRM(MS,
server=ionex_server,
prefix=ionex_prefix,
ionexPath=ionexPath,
timestep=timestepRM,
earth_rot=earth_rot)
else:
rmdict = getRM.getRM(MS,
server=ionex_server,
prefix=ionex_prefix,
ionexPath=ionexPath,
timestep=timestepRM,
earth_rot=earth_rot,
proxy_server=proxyServer,
proxy_type=proxyType,
proxy_port=proxyPort,
proxy_user=proxyUser,
proxy_pass=proxyPass)
if not rmdict:
if not ionex_server:
raise ValueError(
"One or more IONEX files is not found on disk and download is disabled!\n"
"(You can run \"bin/download_IONEX.py\" outside the pipeline if needed.)"
)
else:
raise ValueError(
"Couldn't get RM information from RMextract! (But I don't know why.)"
)
logging.info('Adding rotation measure values to: ' + solset_name + ' of ' +
h5parmdb)
rm_vals = np.array(
[rmdict["RM"][stat.decode()].flatten() for stat in station_names])
new_soltab = solset.makeSoltab(soltype='rotationmeasure',
soltabName='RMextract',
axesNames=['ant', 'time'],
axesVals=[station_names, rmdict['times']],
vals=rm_vals,
weights=np.ones_like(rm_vals,
dtype=np.float16))
return (0)
data.close()
def getRM(MS=None,
server="ftp://cddis.gsfc.nasa.gov/gnss/products/ionex/",
prefix='codg',
ionexPath="IONEXdata/",
earth_rot=0,
timerange=0,
use_azel = False,ha_limit=-1000,use_filter=None,
**kwargs):
'''optional arguments are:
radec or pointing : [ra,dec] in radians, or if use_azel =True, az + el in radians,
timestep in s, timerange = [start, end]in MJD seconds,
otherwise use start_time/end_time (casa timestring,eg. 2012/11/21/12:00:00 or 56252.5d NEEDS PYRAP) ,
stat_names = list of strings per station,
stat_positions = list of length 3 numpy arrays, containing station_position in ITRF meters.
useEMM = boolean, use EMM for Earth magnetic field, otherwise WMM cooefficients will be used.
out_file = string, if given the data points will be written to a text file.
use_mean = True if you only want report for mean of station positions
use_filter =standard deviation,or list of standard deviations (time,long, lat) to gaussian filter TEC data
TIME_OFFSET = float, offset time at start and end to ensure all needed values are calculated,
Returns the (timegrid,timestep,TEC) where TEC is a dictionary containing 1 enumpyarray per station in stat_names.
If stat_names is not given, the station names will either be extracted from the MS or st1...stN '''
#print ('earth_rot', earth_rot)
#print ('timerange ', timerange)
#print ('use_azel ', use_azel)
stat_names=[]
useEMM=False
use_mean = False
myobject = ''
timestep=60
pointing=[0.,0.5*np.pi]
out_file=''
stat_pos=[PosTools.posCS002]
use_proxy = False
#stat_names=['LOFAR_CS002']
if not (MS is None):
(timerange,timestep,pointing,stat_names,stat_pos)=PosTools.getMSinfo(MS);
for key in kwargs.keys():
if key=='use_mean':
use_mean = kwargs[key]
stat_pos_mean = False
if key=='radec' or key=='pointing':
pointing = kwargs[key]
if key=='object':
myobject = kwargs[key]
#out_file = 'RMextract_report_' + myobject
if key=='start_time':
start_time=kwargs[key]
time_in_sec = False
if key=='end_time':
end_time=kwargs[key]
time_in_sec = False
if key=='timestep':
timestep=kwargs[key]
if key=='stat_names':
stat_names=kwargs[key]
if key=='out_file':
out_file=kwargs[key]
if key=='TIME_OFFSET':
TIME_OFFSET=kwargs[key]
if key=='stat_positions':
stat_pos=kwargs[key]
if not stat_names:
stat_names =['st%d'%(i+1) for i in range(len(stat_pos))]
if key=='useEMM':
useEMM=kwargs[key]
if key=="proxy_server": #Check to see if user wants to use a proxy for downloading IONEX files.
use_proxy = True
proxy_server=kwargs["proxy_server"]
proxy_type=kwargs["proxy_type"]
proxy_port=kwargs["proxy_port"]
proxy_user=kwargs["proxy_user"]
proxy_pass=kwargs["proxy_pass"]
if timerange != 0:
start_time = timerange[0]
end_time = timerange[1]
time_in_sec = True
reference_time = start_time
timerange[0] = start_time - timestep
timerange[1] = end_time + timestep
str_start_time=PosTools.obtain_observation_year_month_day_hms(reference_time)
else:
timerange,str_start_time,reference_time=PosTools.get_time_range(start_time,end_time,timestep,time_in_sec,0)
if str_start_time==-1:
return
if useEMM:
#print ("USING EMM for EarthMagnetic Field")
emm=EMM.EMM()
else:
emm=EMM.WMM()
times,timerange=PosTools.getIONEXtimerange(timerange,timestep)
if len(times[-1])==0 or times[-1][-1]<timerange[1]:
timestmp=list(times[-1])
timestmp.append(timerange[1]) #add one extra step to make sure you have a value for all times in the MS in case timestep hase been changed
times[-1]=np.array(timestmp)
timegrid=np.array([])
TECs={};
Bs={}
Bpars={}
air_mass={};
RMs={};
azimuth={};
elevation={};
flags={}
if len(out_file) and len(myobject):
out_file = out_file + '_' + myobject
else:
if len(myobject):
out_file = 'RMextract_report_' + myobject
# print header section of report
if len(out_file):
if os.path.exists(out_file):
os.remove(out_file)
log = open(out_file, 'a')
log.write ('Observing %s\n' % myobject)
if not (MS is None):
log.write ('Using measurement set %s\n' % MS)
if use_azel:
log.write ('observing at a fixed azimuth and elevation \n')
log.write ('station_positions %s \n' % stat_pos)
log.write ('\n')
for st in stat_names:
azimuth[st] = []
elevation[st] = []
air_mass[st] = []
Bs[st]=[]
Bpars[st]=[]
RMs[st]=[]
TECs[st]=[]
air_mass[st]=[]
flags[st]=[]
for time_array in times:
#get RM per timeslot
starttime=time_array[0]
#print ("getting ionexfile for",starttime)
date_parms = PosTools.obtain_observation_year_month_day_fraction(starttime)
dayofyear = date(date_parms[0],date_parms[1],date_parms[2]).timetuple().tm_yday
emm.date=date_parms[0]+float(dayofyear)/365.
#get relevant ionex file
if not use_proxy:
if not "http" in server: #ftp server use ftplib
ionexf=ionex.getIONEXfile(time=date_parms,server=server,prefix=prefix,outpath=ionexPath)
else:
ionexf=ionex.get_urllib_IONEXfile(time=date_parms,server=server,prefix=prefix,outpath=ionexPath)
else:
ionexf=ionex.get_urllib_IONEXfile(time=date_parms,server=server,prefix=prefix,outpath=ionexPath,proxy_server=proxy_server,proxy_type=proxy_type,proxy_port=proxy_port,proxy_user=proxy_user,proxy_pass=proxy_pass)
assert (ionexf!=-1),"error getting ionex data"
tecinfo=ionex.readTEC(ionexf,use_filter=use_filter)
if use_mean:
if not stat_pos_mean:
stn_mean = stat_pos.mean(0)
stat_pos = []
stat_pos.append(stn_mean)
stat_pos_mean = True
#print ('stat_pos.mean', stn_mean)
for station,position in zip(stat_names,stat_pos):
#print ('generating data for station ', station)
for time in time_array:
result = PosTools.obtain_observation_year_month_day_fraction(time)
part_of_day= result[3] * 24
if use_azel:
az = pointing[0]
el = pointing[1]
flags[station].append(1)
else:
az,el = PosTools.getAzEl(pointing,time,position,ha_limit)
if az==-1 and el==-1:
return
if az==999 and el==999:
#outsite hadec range
air_mass[station].append(-999)
azimuth[station].append(-999)
elevation[station].append(-999)
Bs[station].append([-999,-999,-999])
Bpars[station].append(-999)
RMs[station].append(-999)
TECs[station].append(-999) #sTEC value
flags[station].append(0)
continue
flags[station].append(1)
latpp,lonpp,height,lon,lat,am1=PosTools.getlonlatheight(az,el,position)
if latpp==-1 and lonpp==-1 and height==-1:
return
#get VTEC from IONEX interpolation
vTEC=ionex.getTECinterpol(time=part_of_day,lat=latpp,lon=lonpp,tecinfo=tecinfo,apply_earth_rotation=earth_rot)
TECs[station].append(vTEC*am1) #STEC value
emm.lon = lonpp
emm.lat = latpp
emm.h= ION_HEIGHT / 1.0e3
Bpar=-1*emm.getProjectedField(lon,lat)# minus sign since the radiation is towards the Earth
BField=emm.getXYZ()
Bs[station].append(BField)
air_mass[station].append(am1)
azimuth[station].append(az)
elevation[station].append(el)
Bpars[station].append(Bpar)
#calculate RM constant comes from VtEC in TECU,B in nT, RM = 2.62
RMs[station].append((Bpar*vTEC*am1)*2.62e-6)
if use_mean:
break
timegrid=np.concatenate((timegrid,time_array));
for st in stat_names:
air_mass[station] = np.array(air_mass[st])
azimuth[station] = np.array(azimuth[st])
elevation[station] = np.array(elevation[st])
TECs[st]=np.array(TECs[st])
Bs[st]=np.array(Bs[st])
Bpars[st]=np.array(Bpars[st])
RMs[st]=np.array(RMs[st])
flags[st]=np.array(flags[st])
if use_mean:
break
big_dict={}
big_dict['STEC']=TECs
big_dict['Bpar']=Bpars
big_dict['BField']=Bs
big_dict['AirMass']=air_mass
big_dict['elev']=elevation
big_dict['azimuth']=azimuth
big_dict['RM']=RMs
big_dict['times']=timegrid
big_dict['timestep']=timestep
big_dict['station_names'] = stat_names
big_dict['stat_pos'] = stat_pos
big_dict['flags'] = flags
big_dict['reference_time'] = reference_time
# finish writing computed data to report
if len(out_file):
time_range=[big_dict['times'][0],big_dict['times'][-1]]
log.write ('start and end times %s %s \n' % (time_range[0], time_range[1]))
log.write ('reference time for rel_time=0: year month day hr min sec %s %s %s %s %s %s \n' % str_start_time)
if use_azel:
log.write ('observing at azimuth and elevation %s %s \n' % (pointing[0], pointing[1]))
else:
log.write ('observation direction %s %s \n' % (pointing[0], pointing[1]))
log.write ('\n')
k = 0
for key in big_dict['station_names']:
seq_no = 0
if use_mean:
log.write ('data for station mean position at %s\n' % (stat_pos[k]))
else:
log.write ('data for station %s at position %s\n' % (key, stat_pos[k]))
log.write ('seq rel_time time_width El Az STEC RM (rad/m2) VTEC factor \n')
for i in range (timegrid.shape[0]):
el = big_dict['elev'][key][i]
if el < 0 :
ok = 1
stec = 0.0
rm = 0.0
vtec_factor = 1.0
else:
ok = 0
stec =big_dict['STEC'][key][i]
rm = big_dict['RM'][key][i]
vtec_factor = 1.0 / big_dict['AirMass'][key][i]
az = big_dict['azimuth'][key][i]
rel_time = timegrid[i] - reference_time
if i == 0:
time_width = reference_time - timegrid[i]
else:
time_width = timegrid[i] - timegrid[i-1]
log.write("%s : %s %s %s %s %s %s %s %s\n" % (seq_no, ok, rel_time, time_width, el, az, stec, rm, vtec_factor))
seq_no = seq_no + 1
k = k + 1
if use_mean:
break
log.write (' \n')
log.close()
print ('****** finished ionosphere predictions report: ', out_file)
else:
print ('*********** finished ionosphere predictions ***************')
return big_dict