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When I calculate an altitude using a float for the jd, and compare it to an altitude calculated when that same float is put into an array, I get a different result.
The difference is only in the la…
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If the following code is run:
```
from skyfield.api import Topos, load
stations_url = '/home/matt/ephem_data_raw/ephem_20170510/cubesat.txt'
satellites = load.tle(stations_url, reload=True)
`…
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As far as I know, spring equinox of year 2016 is '2016-3-20 4:30'.
I check it in [HORIZONS Web](http://ssd.jpl.nasa.gov/horizons.cgi#top), get result as follows
```
Date__(UT)__HR:MN ObsEcLon…
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I'm not sure if this is an issue or the way it is supposed to be.
I already have TLEs and would like to calculate an orbit. I am using `expire=False` in `Loader`, but the call to EarthSatellite sti…
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Hello,
astropy should be among the dependancies, but is not.
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First, a question: is PyEphem still maintained or should I be switching to astropy?
The PyEphem documentation is very unclear about angles and how to create them or do math on them.
It says the …
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I'm evaluating the use of skyfield for an application to earth observation satellites, I understand this is not a target use case at the moment, but I easily managed to extract the satellite orbital m…
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I have a question regarding epochs. I want to show the night sky as a super-ancient observer would see it or someone in the far flung future. Should I set the year _and_ epoch to be the same?
I have …
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I was suggested to use PyEphem as the best way to propagate the orbit of a satellite.
I'm going to propagate in 1 year, considering the effects of Moon, Sun, zonal harmonics and probably, Jupiter …
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A feature request, if accepted, implying a bug in def146cd4ee17d8fce6d7c80c008c8494a1e65d4 , enabled by incorrect documentation at space-track.org.
https://www.space-track.org (account required) ha…