Questions tagged [spice]

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How to retrieve MSL EDL trajectory using Javascript and webgeocalc API?

I found a "javascript gateway" to NASA SPICE data, the "webgeocalc" web api: https://wgc2.jpl.nasa.gov:8443/webgeocalc/example/perform-calculation.html It works both online and ...
1
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1answer
166 views

Was the famous SPICE package of programs, utilities and data kernels named after "Melange" found on the planet Arrakis?

This question is NOT about a fictional planet: This question is about NASA JPL history and the naming of SPICE. It is not primarily about the fictional planet Arrakis nor the fictional drug Melange ...
3
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1answer
131 views

Horizons ephemeris - how did they calculate that “Keplerian GM” value?

I’ve been playing with the NAIF’s SPICE library for some time (CSPICE in particular). In order to obtain the state vector of an asteroid from its osculating elements, I’m calling the “conics_c” ...
3
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2answers
357 views

How to obtain Chebyshev coefficients directly from the JPL Horizon's interface?

I'm from Spain and I'm currently finishing my degree in Aerospace Engineering. I am starting with all of this. My objective is to obtain the Chebyshev coefficients for the major planets position, ...
3
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1answer
88 views

SPICE defining a topocentric frame on the Moon

I would like to define a topocentric frame for a particular spot on the moon. From the frames required reading i have this: ...