Orbital Parameter Message¶
Simple example¶
Here is an example with the minimum code required to create an OPM file.
import odmpy.opm as opm
from datetime import datetime
header = opm.Header(originator='NASA')
metadata = opm.Metadata(
object_name='International Space Station',
object_id='1998-067A',
center_name='Earth',
ref_frame=opm.RefFrame.EME2000,
time_system=opm.TimeSystem.UTC)
sv = opm.DataBlockStateVector(
epoch=datetime(2014, 11, 7, 15, 30, 23),
x=6794,
y=0,
z=0,
x_dot=0,
y_dot=7.6,
z_dot=0)
data = opm.Data(state_vector=sv)
iss = opm.Opm(header, metadata, data)
with open('iss.opm', 'w') as f:
iss.write(f)
Contents of iss.opm:
CCSDS_OPM_VERS = 2.0
CREATION_DATE = 2014-11-09T22:35:49.837875
ORIGINATOR = NASA
COMMENT Metadata
OBJECT_NAME = International Space Station
OBJECT_ID = 1998-067A
CENTER_NAME = Earth
REF_FRAME = EME2000
TIME_SYSTEM = UTC
COMMENT State Vector Components
EPOCH = 2014-11-07T15:30:23
X = 6794.0
Y = 0.0
Z = 0.0
X_DOT = 0.0
Y_DOT = 7.6
Z_DOT = 0.0