This is kind of a neat idea. Now - does such a thing exist where a GPS receiver is in a plane, and the information is transmitted to a remote source?
This would be the ideal altitude/distance/lost airplane item, I'd think. - Dave -----Original Message----- From: Jim Prouty [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 18, 2005 06:04 To: RC Soaring Exchange Subject: Re: [RCSE] High Altitude Glider/off subject Standard GPS error (drift) can be as high as 16 meters due to the geometry of the constellation and path link errors in the atmosphere. The new WAAS enabled GPS receivers are supposed to be accurate within 3 meters 90% of the time. They use a ground based reference signal to give a more accurate positioning fix. Unlike the old DGPS, all you need is a WAAS enabled receiver to be able to get that accuracy. A neat test to do is take a non-WAAS enabled GPS and zoom in as far as you can on your position. You can actually watch the fix wander around your position as the fix drifts. There a several inexpensive GPS receivers out there that can be put in an RC aircraft to measure altitude and position. The Foretrex 201is very light, compact, and is WAAS enabled. There have been several posts on the list about using them and software that can be used to plot your flight when you land. Cool Stuff. Happy flying, Jim www.jtmodels.com >What are the error/accuracy/precision rates of a GPS system and how do they >compare to the pressure sensing systems? And of course, how does the cost >of a GPS based altimeter system compare. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
