----- Original Message ----- From: "Dave Tweed" To: Sent: Thursday, November 21, 2002 7:53 AM Subject: Re: [OT]: While on the subject of GPS... > Russell McMahon wrote: > > > OK, so I was asked to put together a GPS speedometer. I thought it would > > > be fairly simple, but now I'm not so sure I can expect accuracy without a > > > fair amount of complexity. Is it worth the trouble? > > > > Speed can be deduced from position variation with time BUT you have a speed > > signal already available based on phase shift of received signals. It would > > be trivial to use this for a speedometer function and you could add code to > > make an informed decision about whether something "intetresting" was > > happening. > > > > Given that it's so easy to try, why not try it and see how it works out. > > Trivial? Easy to try? What kind of receivers do you have access to that > provide phase information? pardon me, but doesn't the gps give velocity in knots? Is this completely useless? -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body