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I have found that the geocentric.subpoint function may be off in my limited experience with it. Specifically with the subpoint.longitude value. I have written my own function to calculate this value a…
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I am working on fitting EarthSatellite orbits to observations. This includes creating a satellite from a TLE, then `newsat = sat.copy()`, and changing attributes such as `newsat._n`, `newsat.catalog_…
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### Summary of Issue
Cannot perform a full install of OpenDMAO using the [all] suffix.
### Issue Type
- [ X] Bug
- [ ] Enhancement
POEM #___
### Description
I'm attempting to i…
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For satellite observations, it would be useful to have the ephemeris and body attributes (elong, phase...) in the position of the center of the spacecraft providing its location with respect to the Ea…
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Feature request: Docker seems to be getting quite popular these days, so maybe create a docker container of skyfield and upload it to https://hub.docker.com/
I realize some people have already crea…
ghost updated
4 years ago
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**[Original report](https://bitbucket.org/wxmetvis/mss/issue/467) by Sören Johansson (Bitbucket: [soerenjohansson](https://bitbucket.org/soerenjohansson), ).**
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Hi,
I am trying to compute `B: skyfield.Date` that is a minute before `A: skyfield.Date`.
How should I go about this?
I tried using `datetime.timedelta` to represent one minute and subtract…
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I'm trying to use Observer to determine the time of the sunset for a given day, the problem is that here on the site we have an official sunset time that does not match the one that astroplan gives. A…
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The sgp4 C++ reference library has a very useful `Eci::ToGeodetic()` method (see https://github.com/dnwrnr/sgp4/blob/0cc181ee50c707d1a433e97be98de2b925dd78a4/libsgp4/Eci.cpp).
This is very useful f…
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I created a python 2.7.9 virtual environment and ran:
pip install numpy==1.16
pip install skyfield
When I try to run a file with the code
"from skyfield.api import load"
I get "ImportError: …