def export_omm(satrec, object_name):
launch_year = int(satrec.intldesg[:2])
launch_year += 1900 + (launch_year < 57) * 100
object_id = '{0}-{1}'.format(launch_year, satrec.intldesg[2:])
return {
"OBJECT_NAME": object_name,
"OBJECT_ID": object_id,
"CENTER_NAME": "EARTH",
"REF_FRAME": "TEME",
"TIME_SYSTEM": "UTC",
"MEAN_ELEMENT_THEORY": "SGP4",
"EPOCH": sat_epoch_datetime(satrec).strftime('%Y-%m-%dT%H:%M:%S.%f'),
"MEAN_MOTION": satrec.no_kozai * _xpdotp,
"ECCENTRICITY": satrec.ecco,
"INCLINATION": satrec.inclo / _deg2rad,
"RA_OF_ASC_NODE": satrec.nodeo / _deg2rad,
"ARG_OF_PERICENTER": satrec.argpo / _deg2rad,
"MEAN_ANOMALY": satrec.mo / _deg2rad,
"EPHEMERIS_TYPE": satrec.ephtype,
"CLASSIFICATION_TYPE": satrec.classification,
"NORAD_CAT_ID": satrec.satnum,
"ELEMENT_SET_NO": satrec.elnum,
"REV_AT_EPOCH": satrec.revnum,
"BSTAR": satrec.bstar,
"MEAN_MOTION_DOT": satrec.ndot * (_xpdotp * 1440.0),
"MEAN_MOTION_DDOT": satrec.nddot * (_xpdotp * 1440.0 * 1440),
}
def test_december_32():
# ISS [Orbit 606], whose date is 2019 plus 366.82137887 days.
# The core SGP4 routines handled this fine, but my hamfisted
# attempt to provide a Python datetime for "convenience" ran
# into an overflow.
a = '1 25544U 98067A 19366.82137887 .00016717 00000-0 10270-3 0 9129'
b = '2 25544 51.6392 96.6358 0005156 88.7140 271.4601 15.49497216 6061'
correct_epoch = dt.datetime(2020, 1, 1, 19, 42, 47, 134368)
# Legacy API.
sat = io.twoline2rv(a, b, wgs72)
assertEqual(sat.epoch, correct_epoch)
correct_epoch = correct_epoch.replace(tzinfo=conveniences.UTC)
# Modern API.
sat = Satrec.twoline2rv(a, b)
assertEqual(conveniences.sat_epoch_datetime(sat), correct_epoch)
def test_sat_epoch_datetime():
sat = Satrec.twoline2rv(LINE1, LINE2)
datetime = conveniences.sat_epoch_datetime(sat)
zone = conveniences.UTC
assertEqual(datetime, dt.datetime(2000, 6, 27, 18, 50, 19, 733568, zone))