[aprssig] TAPR Differential GPS Reference Station
gerry.creager at tamu.edu
Thu Apr 23 14:23:23 CDT 2009
A simple averaging system will eventually work... over a period of
weeks. However, a simplified system that decorrelates the data by
taking positoins every 30- to 60-sec for some relatively large number of
samples, at least one day (24 hours) would provide a decently accurate
position in 2D. Getting height right is a hit or miss proposition,
however, using only L1. If one were to use the aforementioned
decimation approach with a modern receiver with WAAS enabled, one would
have a much better 3D "survey".
Cap Pennell wrote:
> And (not APRS, but) Stan Huntting KW7KW created SAwatch to do the smoothing
> too, and it works with the TAPR DGPS Reference Station Interface Board.
> 73, Cap
>> -----Original Message-----
>> From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On
>> Behalf Of Steve Dimse
>> Sent: Tuesday, April 21, 2009 5:15 PM
>> To: k5ykg at arrl.net; TAPR APRS Mailing List
>> Subject: Re: [aprssig] TAPR Differential GPS Reference Station
>> 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.
>> 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
>>> Thanks Steve.
>>> 73 de Boyd
> aprssig mailing list
> aprssig at tapr.org
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843
More information about the aprssig