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[aprssig] TAPR Differential GPS Reference Station

Steve Dimse steve at dimse.com
Wed Apr 22 00:14:38 UTC 2009


I forget the exact algorithm TAC-2 used, it was some sort of  
averaging. If I recall right the length was user-programmable but I  
think 24 hours was recommended.


Steve

On Apr 21, 2009, at 7:56 PM, Boyd Prestwood K5YKG wrote:

>
> Steve, Wasn't this something like an "averaging" of accumulated  
> positions over that 24-hour period?  Then those coordinates were  
> programmed into the Ref Station?
> It would be appreciated if anyone else knows how any of the client  
> applications massaged or used any of this data, they could chime in  
> here.
> Thanks Steve.
> 73 de Boyd K5YKG
>
>
>
> Steve Dimse wrote:
>>
>> On Apr 21, 2009, at 2:16 PM, Boyd Prestwood K5YKG wrote:
>>
>>> However it was my understanding that the site from which the Ref  
>>> Station transmitted had to be surveyed for "exact" coordinates
>>
>> The TAC-2 software performed a 24 hour integration of position,  
>> this was found to produce a very accurate position. Surveys were  
>> not necessary. Otherwise, my recollections match with yours.
>>
>> Steve K4HG
>>
>>
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