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Version of pycraf compatiable with version 2.11 or later of python-sgp4 #30
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Indeed, it is planned to work on the |
First, permit me to apologize for not getting back with sooner.
Secondly, to answer your question concerning python-sgp4 versus cysgp4 I
looked into the code baseline for the two. According to their
documentations both appear to trace their baselines to the document
"Revisiting Spacetrack Report #3." However in checking the change-log
for python-sgp4 the code base seems closer to Vallado's C++ code
reflected in "Revisiting Spacetrack Report #3: Rev 2." I've attached a
copy of this report to this note from your convenience.
In short, I would stick with python-sgp4 since it appears to comes
closest to Vallado's C++ code reflected in "Revisiting Spacetrack Report
#3: Rev 2" which is best documented implementation outside of AFSPC.
Hope this helps.
Sam Dupree.
…On May/25/2020 02:56:54, Benjamin Winkel wrote:
Indeed, it is planned to work on the |satellite| sub-package in the
near future (few weeks), to add some functionality for satellite
constellation simulations. The current plan is to migrate to cysgp4
<https://github.com/bwinkel/cygrid> in the process, as it integrates
nicely with |numpy| arrays (and broadcasting). Under the hood, it uses
a different C++ library such that the results will be slightly(!)
different from |python-sgp4|. Do you have strong feelings about this?
If there are good reasons to also continue to support |python-sgp4|
one could probably make it so that both 3rd party packages are supported.
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Thanks a lot, this is very good information indeed. I may make this a user option then, perhaps. It should not be a huge problem, as If I may ask, what do you use |
I just started to use pycraf, but this appears to be a quite simple problem. The Satellite object in the current python-sgp4 version 2.12 has been moved from sgp4.io to sgp4.model. I made a small fix #32 and pycraf together with sgp4 2.12 appears to work fine now |
Will there be a version of pycraf compatible with version 2.11 or later of python-sgp4? If so, what time frame can we expect to see it?
Sam Dupree.
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