[Moon-Net] converting AZ / EL coordinates to XY coordinates

Edward R Cole kl7uw at acsalaska.net
Tue Apr 27 19:42:10 CEST 2021


FYI (only):

The 60-foot Apollo Station (MSFN) at Goldstone was an X-Y mount which 
was useful for rapid angle tracking of spacecraft in near-Earth 
orbit.  I think the DSN dishes used az-el (though maybe the 26m 
were  equatorial mounts).

73, Ed - KL7UW

At 09:25 AM 4/27/2021, Mike W9IP via Moon-net wrote:
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>
>Dear Staszek,
>XY coordinates are also known as UV and also theta, phi.  Here is a 
>link to convert back and forth:
><https://gist.github.com/telegraphic/841212e8ab3252f5cffe>https://gist.github.com/telegraphic/841212e8ab3252f5cffe 
>
>73,
>W9IP
>
>
>The rotor manufacturer SPID wrote to me the following request.
>73's de Staszek SP6GWB
>--------------------------------------------------------------------------------------------
>
>Mr. Staszek, could you put a question on the moon forum ??
>Since I dealt with XY rotors, I need an algorithm (formula) for 
>converting AZ / EL coordinates to XY coordinates.
>I need an algorithm, a formula to convert.
>Please post such a query, maybe someone will answer or tell you where to look?
>Now many follow LEO satellites and the XY rotors are the best for that.
>
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73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com 
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