The trick is to just run the timing receiver in all-in-view mode collecting 1PPS data against your house standard as usual, but also capture all the binary message(s) where the per-SV Az/El/SNR and phase residuals are reported. This allows you to re-create the individual "1PPS" from each SV used in the timing solution. Or maybe just use the RINEX data. This is what I was referring to in the CORS reference to Brooke.
It would be "cheating" to know the eclipse path ahead of time and mine the data for confirmation. Instead I dare you to blindly mine the GPS data for all of August and then make a bold claim when and where the eclipse was, like capturing a trace through a cloud chamber. Having done all that you can "look in the back of the book" for the actual eclipse path to see how right you were. /tvb ----- Original Message ----- From: "Bob kb8tq" <[email protected]> To: "Tom Van Baak" <[email protected]>; "Discussion of precise time and frequency measurement" <[email protected]> Sent: Thursday, July 13, 2017 3:01 PM Subject: Re: [time-nuts] WWVB & Eclipse Hi If one perhaps knew the path of the eclipse in advance *and* had a GPS timing receiver that could be set somehow to look at a single satellite….. all one would need is a means of comparing the output to a stable reference to *possibly* observe something interesting. More or less: You know the path of eclipse roaring along bashing the ionosphere. You can (maybe) pick a sat who’s signal traverses that region while getting to your location during the eclipse. Yes, it’s not original science. It might still be fun. Bob > On Jul 13, 2017, at 5:55 PM, Tom Van Baak <[email protected]> wrote: > > Brooke, > > Nice set of links. Thanks. There's a poster here with an overview: > > https://cedarweb.vsp.ucar.edu/wiki/images/6/60/Magdalina_Moses-Eclipse_Research_CEDAR_Poster.pdf > >> Is there a study based on GPS observations? > > It will all be there for free in CORS. It's just a matter of mining the data. > Apparently this is done a lot. Here are some random examples of what can be > done. Pretty amazing. > > https://www.ngs.noaa.gov/PUBS_LIB/2005_01_ION_NTM_Ionosphere.pdf > http://www.gps.gov/cgsic/smg/2004/smith.pdf > https://arxiv.org/pdf/1006.3565.pdf > > Google for a subset of words like: CORS Ionosphere Monitoring Analysis > Modeling TEC > > /tvb > > ----- Original Message ----- > From: "Brooke Clarke" <[email protected]> > To: "Discussion of precise time and frequency measurement" > <[email protected]> > Sent: Thursday, July 13, 2017 1:35 PM > Subject: [time-nuts] WWVB & Eclipse > > >> Hi: >> >> There's a massive experiment relating to the strength of WWVB and a >> transmitter in Dixon California. >> >> https://www.washingtonpost.com/news/speaking-of-science/wp/2017/07/12/a-massive-atmospheric-experiment-is-planned-for-august-solar-eclipse/?utm_term=.4d7101b869f6 >> >> http://eng.umb.edu/~eclipsemob/index.php >> <http://eng.umb.edu/%7Eeclipsemob/index.php> >> >> http://www.hamsci.org/sites/default/files/publications/2017_IES_Liles.pdf >> This article says Dixon may transmit at 55.1 and 135.95 kHz. >> >> The EclipseMob receiver works with a smart phone acting as an SDR. as well >> as the source of it's position and the >> date-time of observation. >> >> There is a parallel study based on ham radio WSPRNet and Reverse Beacon >> Network. >> http://hamsci.org/ >> >> Is there a study based on GPS observations? >> >> -- >> Have Fun, >> >> Brooke Clarke, N6GCE >> http://www.PRC68.com >> http://www.end2partygovernment.com/2012Issues.html >> >> _______________________________________________ >> 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. > _______________________________________________ > 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. _______________________________________________ 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.
