[time-nuts] Updated GPS Interface docs available
brooke at pacific.net
Wed May 7 09:25:20 EDT 2008
Thanks for the link. These pdf docs have pretty good bookmarks. They made it
easy to find this:
220.127.116.11.2 GPS and GNSS Time. The GPS/GNSS-time relationship is given by,
tGNSS = tE – (A0GGTO + A1GGTO (tE – totGGTO + 604800 (WN – WNotGGTO) + A2GGTO
(tE – totGGTO + 604800 (WN – WNotGGTO))2)
where tGNSS is in seconds, tE and WN are as defined in Section 18.104.22.168.2.4 of
IS-GPS-200, and the remaining parameters are as defined in Table 20-XI.
Apparently there is a bias offset and drift between GPS time and GNSS time.
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