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

Nigel Gunn G8IFF/W8IFF nigel at ngunn.net
Wed Dec 10 13:59:20 PST 2008

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!

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 at 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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