Hi Extracting code phase data from the TBolt may or may not be practical. I'm looking at that as a "future project".
Right now all I'm really trying to do is see if there is any real interest in an "amateur" common view experiment. With the PICTIC II and a TBolt, you *should* have just about everything you would need to do a comparison between the TBolt's 1 pps and your local standard. Not a lot of cash required since most of us seem to have TBolts already. My *guess* is that a 1 ns resolution counter is probably good enough, so the PICTIC is actually overkill. Bob On Jul 8, 2010, at 9:55 AM, b...@lysator.liu.se wrote: > Many (most) GPS postprocessing packages can export a timesolution. But it > is not the usual use of these packages, so it might not be the most > obvious procedure. > >> From the receiver view, the most common setup for these packages, is > datasets from a dual frequency receiver, where you want to solve for a > static solution or maybe a moving receiver (kinematic/ solution). > > Standard measurements are code and phase measurements for L1 and L2, maybe > also a doppler measurement. > > If I remember the Thunderbolt interface discussions we had correctly there > is only a code measurement available from the Tbolt. > > At least in the past the online services has been limited to dual > frequency data and solving for a static position. There was also > geografical limitations where say a US based service would not process a > european dataset. > > Still its an interesting project to setup an "amature" Common view process. > > -- > > Björn > >> Hi >> >> From a quick look it's not real clear how you would go about extracting >> time from the software suite. It's certainly useful for navigation though. >> >> A secondary gotcha is that the TBolt likely has some internal "issues" >> that distort the data a bit. Running a TBolt on both ends should wash out >> the ones that are firmware based. >> >> Bob >> >> >> On Jul 7, 2010, at 8:54 PM, jimlux wrote: >> >>> Bob Camp wrote: >>>> Hi >>>> I just got through poking at a couple of TBolts with Lady Heather. It >>>> appears that you can indeed get the hardware and software to put the >>>> TBolt into single satellite mode. That may enable a pretty simple GPS >>>> common view setup. One way to do it: Somebody picks a set of sats and >>>> times that make sense. Since the constellation repeats it's going to be >>>> a fairly simple table of this sat / that time. At those times they run >>>> their TBolt against something pretty good and log the results >>>> The logs get put on a site somewhere >>>> Somebody else wants to do a comparison. They set up to monitor the same >>>> satellite at the same time. They log the data. >>>> They download the posted data. >>>> They run the math on the data, out comes a time comparison between the >>>> two locations. Should be fairly simple to try out. Anybody with a good >>>> house standard want to give it a try? >>> >>> Couldn't you run your data against Gipsy/OASIS or similar >>> http://gipsy.jpl.nasa.gov/orms/index.html >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.