| Re: satellite orbit computation in IDL [message #39159 is a reply to message #39045] |
Mon, 19 April 2004 13:23  |
Craig Markwardt
Messages: 1869
Registered: November 1996
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Senior Member |
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"CED" <cseynat@swiftdsl.com.au> writes:
> Hello Craig,
>
> Thank you for your reply. World peace would be good as well, yes!! :-)
>
> Sorry for the delay in my reply. I do not get much time to work on this
> project, and have only been able to get back to it a few days ago.
>
> I am interested in the routines you wrote. Can I find them on your web
> site? If so, what is its address? I am also interested in the routines for
> computation of earth station position.
Cedric, I just put geopotential routines on line on my web page. They
include the ability to compute the gravitational acceleration at any
point outside of the earth. You need a "description" file for the
geopotential model you want; some are provided, and it's easy to make
new ones. You will need to download the actual model coefficients
yourself. URLs are included.
As for your other desires: Lunisolar perturbations can be computed
using the JPL ephemerides, routines for which can be found on the same
page (JPLEPHREAD/INTERP). DDEABM is a high precision integrator.
I have some half-finished codes for atmospheric drag and earth tides,
which I can send, and you can finish if you are motivated. :-) Solar
radiation pressure and earth shadow models, you are on your own
presently.
Yours,
Craig
P.S. http://cow.physics.wisc.edu/~craigm/idl/idl.html (under ephemerides)
--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@REMOVEcow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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