Orbit Predictor is a Python library to propagate orbits of Earth-orbiting objects (satellites, ISS, Santa Claus, etc) using TLE (Two-Line Elements set)
Al the hard work is done by Brandon Rhodes implementation of SGP4.
We can say Orbit predictor is kind of a "wrapper" for the python implementation of SGP4
You can install orbit-predictor from pypi:
pip install orbit-predictor
When will be the ISS over Argentina?
In [1]: from orbit_predictor.sources import EtcTLESource
In [2]: from orbit_predictor.locations import ARG
In [3]: source = EtcTLESource(filename="examples/iss.tle")
In [4]: predictor = source.get_predictor("ISS")
In [5]: predictor.get_next_pass(ARG)
Out[5]: <PredictedPass ISS over ARG on 2017-11-10 22:48:10.607212>
In [6]: predicted_pass = _
In [7]: position = predictor.get_position(predicted_pass.aos)
In [8]: ARG.is_visible(position) # Can I see the ISS from this location?
Out[8]: True
In [9]: import datetime
In [10]: position_delta = predictor.get_position(predicted_pass.los + datetime.timedelta(minutes=20))
In [11]: ARG.is_visible(position_delta)
Out[11]: False
In [12]: tomorrow = datetime.datetime.utcnow() + datetime.timedelta(days=1)
In [13]: predictor.get_next_pass(ARG, tomorrow, max_elevation_gt=20)
Out[13]: <PredictedPass ISS over ARG on 2017-11-11 23:31:36.878827>
WSTLESource needs the tle.satellogic.com service to be working. We are doing changes to have it public available.
- Memorytlesource: in memory storage.
- EtcTLESource: a uniq TLE is stored in /etc/latest_tle
- WSTLESource: It source is using the TLE API.
The default 'predictor' code is tunned to low CPU usage. (IE: a Satellite computer). The error estimation is ~20 seconds. If you need more than that you can use the HighAccuracyTLEPredictor passing precise=True to get_predictor().
- Write pep8 complaint code.
- Wrap the code on 100 collumns.
- Always use a branch for each feature and Merge Proposals.
- Always run the tests before to push. (test implies pep8 validation)