[time-nuts] Time transfer, internationally before GPS

Tom Van Baak tvb at LeapSecond.com
Wed Mar 5 03:38:48 EST 2014


> I think there were a couple of steps in between things like time-mation
> satellites and such precursors to GPS. But I believe that CS references
> were trucked around for a long time.
> Regards
> Paul
> WB8TSL

Hi Paul,

I'm glad you know about Timation. At some point every one who plays with GPS should take a quick look back. Here is some light reading. If nothing else, read the Origins of GPS paper (GPS World, u-blox) and the NRL GPS Bibliography.


TIMATION - a GPS Predecessor Program
https://directory.eoportal.org/web/eoportal/satellite-missions/t/timation


First GPS NAVSTAR Satellite Goes on Display
http://www.nrl.navy.mil/media/news-releases/2013/first-gps-navstar-satellite-goes-on-display
http://www.nrl.navy.mil/PressReleases/2013/25-13r_NTS-2_1620x2649.jpg (worth every pixel)


The Origins of GPS, and the Pioneers Who Launched the System
https://www.u-blox.com/images/stories/the_origins_of_gps.pdf
http://gpsworld.com/origins-gps-part-1/
http://gpsworld.com/origins-gps-part-2-fighting-survive/


Initial Results of the NAVSTAR GPS NTS-2
http://tycho.usno.navy.mil/ptti/1977papers/Vol%2009_13.pdf (USNO copy)
http://leapsecond.com/history/1978-PTTI-v9-NTS-2.pdf (high-res from original)
http://leapsecond.com/history/Ashby-Relativity.htm
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA058591
http://www.dtic.mil/dtic/tr/fulltext/u2/a058591.pdf


NRL GPS Bibliography
http://www.nrl.navy.mil/content_images/MR8988.pdf (46.0 MB)
(An Annotated Bibliography of the Origin and Development of the Global Positioning System at the Naval Research Laboratory)
http://www.gpsdeclassified.com/wp-content/uploads/2013/08/NRL_GPS_Bibliography-web.pdf (5.5 MB)


/tvb



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