Man-Wai, Plot the Lat/Long details on a map.....look around you and you should be in the place the GPS thinks you are. If you are in Hong Kong and the GPS says Canada, there's something very wrong!
Seriously though, there are two types of service PPS and SPS. The PPS is the system used by the military and the less precise SPS system used by the standard commercial GPS units. A good document to look at can be found here: http://www.navcen.uscg.gov/pubs/gps/sigspec/gpssps1.pdf This describes not only the data format but also the way the SPS service is put together. Normally you don't need to go down to the individual byte levels as the GPS drivers normally provide simple lat/long data in real time but this can be specific to individual manufacturers even though most of them have now standardized. Dave Crozier -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Man-wai Chang Sent: 09 November 2007 08:19 To: [email protected] Subject: Re: [NF] GPS John Weller wrote: > No Question 2: How do you know that you are reading *CORRECT, REAL* GPS signals? :) -- @~@ http://changmw.homeip.net / v \ May the Force and Farce be with you! Linux 2.6.23.1 /( _ )\ (Xubuntu 7.04) 16:18:01 up 7 days 2:49 ^ ^ 2 users load average: 0.02 0.02 0.00 news://news.3home.net news://news.hkpcug.org news://news.newsgroup.com.hk [excessive quoting removed by server] _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[EMAIL PROTECTED] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
