[time-nuts] Positioning Accuracy - Lady Heather vs. T-Bolt Monitor

[Bob Camp]

Hi

The data is as accurate as the TBolt it’s self. The device can use the extra digits. The utility of a more accurate position has been verified in the past. 

Simple math:

Each meter you are off is 3 ns. In a worst case situation you could get 6 ns of “ripple” as the constellation moved around you. That’s about half of the best case day / night ionosphere shift. 

Bob


> On Mar 6, 2016, at 2:51 PM, johncroos via time-nuts <time-nuts at febo.com> wrote:
> 
> Hello Time Nuts -My question is --- both LH and T-Bolt Mon will readout position during andat the conclusion of a self survey.The readout from LH provides 2 additional digits of resolution compared to T-bolt Monitor.That is LH provides 7 digits of Lat or Lon to the right of the decimal point; T-bolt Mon provides 5.Now with the understanding that one needs to set a relatively high elevation andamplitude masks to eliminate all but robust signals, and that one must take a lotof samples (48,000 or more) --- Has anyone verified the utility of those extra two digits?By utility I mean - is the 6th decimal place accurate assuming the above constraints.I am trying to nail a position in Longitude to 2 feet or less at a Latitude of 38 degrees N.I have lots of time to take lots of survey points so that is not an issue.Best regards   - John k6iql
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.