[amsat-bb] Re: Azimuth question

[Bruce Bostwick]

On Jan 9, 2010, at 1:47 PM, Dave Guimont wrote:

> At 11:37 AM 1/9/2010, you wrote:
>> Randy,
>> True North is used as a reference. Magnetic North changes with  
>> observer
>> location and time.
>>
>
> Art, what does mag north have to do with time??

Magnetic deviation changes slowly over time as the earth's magnetic  
field changes.  The rate and current deviation are usually pretty  
precisely known for most areas.

"No nation was ever so virtuous as each believes itself, and none was  
ever so wicked as each believes the other." -- Bertrand Russell