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aerospaceresearch / orbitdeterminator

determination of satellite orbits and more
MIT License
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Setting standard gravitational parameter according to the central body and find a place for the constants #247

Open hornig opened 3 years ago

hornig commented 3 years ago

There are several places, where we are using mu, the standard gravitational parameter. Currently it is fixed to Earth in most cases. it would be better to have it selectable and also to have it at a central location to not have duplicates.

That we should change. Propose a better way! :)

For example it is in these files:

https://github.com/aerospaceresearch/orbitdeterminator/blob/master/orbitdeterminator/kep_determination/gauss_method.py#L27-L28

https://github.com/aerospaceresearch/orbitdeterminator/blob/master/orbitdeterminator/kep_determination/gibbs_method.py#L15

https://github.com/aerospaceresearch/orbitdeterminator/blob/master/orbitdeterminator/kep_determination/lamberts_method.py#L10

https://github.com/aerospaceresearch/orbitdeterminator/blob/master/orbitdeterminator/util/state_kep.py#L29

NamamiShanker commented 3 years ago

Hey! I am a new contributor and I recently discovered your project. Can I work on this issue?

hornig commented 3 years ago

@NamamiShanker sure, just start. before you do a PR chat with us here https://aerospaceresearch.zulipchat.com/#narrow/stream/147024-OrbitDeterminator about it.

pranjii commented 2 years ago

Hey if this issue is still open I will work on it. Could you give me a few example of cases?

20JE0187 commented 2 years ago

Hey! I am new to open source contributions and want to contribute to this project. Can you please explain a little bit that what is the problem actually, with an example and what I have to do here to resolve that issue ?

20JE0187 commented 2 years ago

What things and topics of orbit determination we should learn to understand the code and resolve the issue ?

Arunim10 commented 2 years ago

Hey! I am new to open source contributions and want to contribute to this project. Can you explain what do you mean by 'selectable' here ?

Arunim10 commented 2 years ago

I have observed that different values of mu of Earth are being used. For example , in this link https://github.com/aerospaceresearch/orbitdeterminator/blob/master/orbitdeterminator/kep_determination/gibbs_method.py#L15 , mu of earth used = 398600.4418 km^3/sec^2 and in this link https://github.com/aerospaceresearch/orbitdeterminator/blob/master/orbitdeterminator/util/state_kep.py#L29 mu of earth used = 398600.4405 km^3/sec^2

So shall we go with any one value or with both values ?