[amsat-bb] Re: AMSAT-BB Azimuth predictions true or magnetic north

[Nigel Gunn G8IFF/W8IFF <nigel@xxxxxxxxx>]

It must be true or grid north, otherwise your software would need to know the magnetic variation.
The effect of magnetic variation depends on your location.


Call Sign wrote:

> 
> So......... when we get these azimuth degrees in the pass prediction charts, 
> saying where we will acquire the signal, its high point and the loss of the 
> signal; do these degrees relate to magnetic or true north?   Second part, 
> are there any reporting birds that differ in which of those two, that are 
> being used and is the answer the same for the International Space Station? 
> Thanks in advance for your response!


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Nigel A. Gunn. G8IFF   W8IFF (have also held KC8NHF, M0NHF, 9H3GN)
1865 El Camino Drive, Xenia, OH 45385-1115, USA   937 825 5032
e-mail nigel@ngunn.net             www  http://www.ngunn.net
Member of  ARRL, GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pig #385,
                   Dayton ARA #2128,  AMSAT-NA   LM-1691,  AMSAT-UK, MKARS,  ALC
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