libgs_ops.propagator.Propagator¶

class libgs_ops.propagator.Propagator(api=None, tles=None, gs_lat=None, gs_lon=None, gs_elev=0, tle_timeout=1, nids=[])[source]¶

Class to compute pointing angles for a satellite based on its Norad ID

You can connect to a local Db using the TLEDb class, to spacetrack using the SpaceTrackAPI class, or simply just specify the TLEs directly as a string. The latter will use the manually input tles and never query space-track.

For a reference on TLEs see Wikipedia

Note

This class relies heavily on py-ephem

Parameters:

api – API for TLE updates
tles (str) – TLEstring
gs_lat (float, optional) – latitude of ground station
gs_lon (float, optional) – longitude of ground station
gs_elev (float, optional) – elevation of ground station
tle_timeout (float, optional) – Time in days before re-requesting new TLEs
nids (list(int), optional) – List of NORAD IDs to track. If a satellite is requested that is not in this list it will be added and a full refresh of the TLEs from space-track initiated.

Methods

`compute_pass`(nid[, key_els, when, dt])	Perform a detailed calculation of the pass and
`get_all`(nid[, gs_lat, gs_lon, gs_elev, when])	Just a wrapper around pyephem _compute function, which allows the extraction
`get_angles`(nid[, gs_lat, gs_lon, gs_elev, when])
`get_angles_old`(nid[, gs_lat, gs_lon, …])	If the user prefers to calculate the angles at a specific time he should set when=YYYY/MM/DD HH:mm:ss.
`get_doppler`(nid, freq[, gs_lat, gs_lon, …])
`get_eclipsed`(nid[, gs_lat, gs_lon, gs_elev, …])
`get_ground_coord`(nid[, when])	Return the ground track lat/long coord without needing the ground station
`get_orbit`(nid[, when])	Return the orbital elements
`get_passes`([nid, N, when, horizon])	Compute the next passes
`get_range`(nid[, gs_lat, gs_lon, gs_elev, when])
`get_range_rate`(nid[, gs_lat, gs_lon, …])
`get_tle`(nid)	Return TLEs from a NORAD ID by
`get_visible_satellites`([tz, future_only, …])	Get a list of current and upcoming radio amateur satellite passes.
`print_info`(nid[, when])	Print all info about a specific space item

Attributes

ST_URL

Inherited from base class