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VSAT technology and installation >> Dish pointing and alignment >> Calculation AZ by equation https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1261055045 Message started by xband on Dec 17th, 2009 at 1:04pm |
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Title: Calculation AZ by equation Post by xband on Dec 17th, 2009 at 1:04pm
Hello,
Im trying to make sure my ACU unit that controlls the dishpointing works perfect, so I am trying to use math in order to calculate the AZ pointing angle using the equation A= 180 + arctan [ tan(S-N)/sinL ] where S is the satellite long, N the site long and L the site LAT (all in degrees) My question is a bit simple for you I guess, in order to use this equation I need to have the LONG part in degrees west. How do I transform long from East to West? i.e. In Athens we have LAT LONG 37 N 23 E What would that be in degrees west ? LAT LONG 37 N (=?) W ??? Im a bit confused on how to calculate this one Thanks, Xband |
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Title: Re: Calculation AZ by equation Post by Eric Johnston on Dec 17th, 2009 at 9:28pm
I suggest you input degrees west as negative and degrees east as positive.
Best regards, Eric. |
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