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On Tuesday, September 15, 2009 2:55 PM, Richard B. Langley 
said:
> No it isn't. The receiver must keep track of rollovers by itself. More
info here:
> .
> -- Richard Langley
>
> Quoting Smith_Peter@emc.com:
>
>> The number of roll-overs is included in the  GPS message stream

Actually, since your (very interesting, by the way) article was written
in 1998, the GPS message stream has been beefed up to include, among
other data, a 13-bit Extended Week Number or Transmission Week Number
(not exactly a count of roll-overs -- I misspoke). This field is in
message type 10, bits 39-51. See NAVSTAR GLOBAL POSITIONING SYSTEM
INTERFACE SPECIFICATION, IS-GPS-200, 7 March 2006 at
https://navcen.uscg.gov/gps/modernization/IS-GPS-200D_w_IRN_1_7Mar06%20N
S.pdf

 -- Peter Smith

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