def getTLE(startUTC):
"""
gets the catalog of objects for the requested date range
Parameters
----------
t : timestep for reference date (can be any)
Returns
-------
catalog : the catalog of obtained objects
entries : number of objects in catalog
"""
debug = True
startUTC = str2datetime(startUTC)
query = st.SpaceTrackClient("*****@*****.**",
'Qwertyuiop1234567890')
time1 = startUTC + timedelta(hours=-24 * 2)
time2 = time1 + timedelta(
hours=24) ## obtain tle for objects updated within two weeks
day1, month1, year1 = str(time1.day).zfill(2), str(
time1.month).zfill(2), str(time1.year)
day2, month2, year2 = str(time2.day).zfill(2), str(
time2.month).zfill(2), str(time2.year)
custom_name = year1 + "-" + month1 + "-" + day1 + "__" + year2 + "-" + month2 + "-" + day2
entries = 0
if path.exists("TLE_catalog" + custom_name + ".txt") == False:
if debug:
print("requesting file from server")
date_range = ops.make_range_string(year1 + "-" + month1 + "-" + day1,
year2 + "-" + month2 + "-" + day2)
#result = query.tle_query(epoch=date_range)
result = query.tle_publish_query(publish_epoch=date_range)
## write catalog to file
with open("TLE_catalog" + custom_name + ".txt", "w") as outfile:
json.dump(result.json(), outfile)
entries = len(result.json()[:])
catalog = result.json()
else:
if debug:
print("tle file found on disk. Not downloading.")
with open("TLE_catalog" + custom_name + ".txt") as json_file:
result = json.load(json_file)
entries = len(result[:])
catalog = result
return catalog, entries
def tle_query(utc, args):
"""
returns the historic tle for the object
"""
query = st.SpaceTrackClient(args.user, args.passwd)
start_date = utc + timedelta(hours=-24 * args.pastDaysRange)
end_date = utc
date_range = ops.make_range_string(
str(start_date.year) + "-" + str(start_date.month).zfill(2) + "-" +
str(start_date.day).zfill(2),
str(end_date.year) + "-" + str(end_date.month).zfill(2) + "-" +
str(end_date.day).zfill(2))
result = query.tle_query(epoch=date_range, norad_cat_id=args.noradid)
return result
def obtainTLE(noradid, refUTC, args):
"""
for a given norad id, obtains the tle for the relevant date range
Parameters
----------
noradid : the noradid of the satellite
Returns
------
returns the tle of the satellite (tle = line1 + line2 + line3)
"""
query = st.SpaceTrackClient(args.user, args.passwd)
time2 = refUTC + timedelta(hours=24)
day1, month1, year1 = str(refUTC.day).zfill(2), str(
refUTC.month).zfill(2), str(refUTC.year)
day2, month2, year2 = str(time2.day).zfill(2), str(
time2.month).zfill(2), str(time2.year)
date_range = ops.make_range_string(year1 + "-" + month1 + "-" + day1,
year2 + "-" + month2 + "-" + day2)
if path.exists(str(noradid) + ".txt") == False:
result = query.tle_query(epoch=date_range, norad_cat_id=noradid)
with open(str(noradid) + ".txt", "w") as outfile:
json.dump(result.json(), outfile)
line1 = result.json()[0]["OBJECT_NAME"]
line2 = result.json()[0]["TLE_LINE1"]
line3 = result.json()[0]["TLE_LINE2"]
else:
with open(str(noradid) + ".txt") as json_file:
result = json.load(json_file)
line1 = result[0]["OBJECT_NAME"]
line2 = result[0]["TLE_LINE1"]
line3 = result[0]["TLE_LINE2"]
return line1, line2, line3
output = [x, y, ra, dec, utc, t]
thewriter.writerow(output)
if __name__ == "__main__":
parser = ArgumentParser(
"OrbInfoUpdated",
description="extracts all the info for orbit determination")
parser.add_argument("--obs",
required=True,
type=int,
help="the observatio id")
parser.add_argument("--noradid",
required=True,
type=int,
help="the noradid of the satellite")
parser.add_argument("--beam", required=True, help="the beam file")
parser.add_argument("--user",
required=True,
help="the user name for spacetrack.org")
parser.add_argument("--passwd",
required=True,
help="the passord for spacetrack.org")
args = parser.parse_args()
global beamFile, query
query = st.SpaceTrackClient(args.user, args.passwd)
beamFile = args.beam
main(args)