I have developed some code that processes a 24-48 hour survey to calculate a precise position. With a good (geodetic/survey) quality antenna I get my location to within a few inches. With a conical timing antenna, I get around 8 inches of error. With a cheap patch antenna, around a foot.
Nice results. Did you start to see any diurnal patterns in this data? Did you check if the 0x8E-A9 TSIP command lets you increase the duration of the survey from it's default of 2,000 fixes? I recall doing this once through TBoltmon for 86,400 or more fixes. This presumably allows you to run your survey long enough to get the precise position you were looking for and avoids the limitations of the 0x32 command. For my TBolt monitoring program I display the double-precision values in the 8F-AC packet (to a few more decimal places than TBoltmon shows). There's a double-precision 0x84 command too. In determining an accurate position statistically as you are, would having the Az/El or DOP values be of benefit? Or are using a form of double-precision position averaging based on the 8E-A9 info? /tvb _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
