[time-nuts] GPS PRN 32

Mike S mikes at flatsurface.com
Sat Feb 9 21:52:59 EST 2008


At 07:42 PM 2/9/2008, Bruce Griffiths wrote...
>The Jupiter documentation indicates that PRN range is 1-32 with 0 used
>to indicate all satellites.

You should be good, then, since the developers obviously accommodated a 
PRN 32.

The statement quoted from the original article ("GPS receivers 
initially were built to accommodate up to 31 satellite signals...") is 
incorrect. The PRN range for space vehicles has always been 1-32. (see 
Table 3-I in 
http://www.navcen.uscg.gov/pubs/gps/icd200/ICD200Cw1234.pdf ). The 
concern is that the code in some GPS receivers was poorly written, and 
set up data structures to support PRNs 0-31, even though PRN 0 is, and 
has always been, undefined.

So problems are not a matter of the age of the receiver, but the 
quality of its programming.





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