Subject	Garmins are spec'd for 0.1 MPH, BUT>>>
Posted by	mm_95TT on April 09, 2003 at 3:43 PM
	This message has been viewed 88 times.
In Reply To	Going racing & looking for help/sponsors posted by Dallas DamonZ on April 07, 2003 at 09:32 PM
Message	GPS speed measurements are inherently 3-dimensional. They typically measure speed via measuring doppler shifts in the satellite signals. This means the speed measurement is 3-D and based on terrain (multipath, etc from mountains and terrain can cause errors). So, don't expect consumer GPS to be more accurate than 0.5 MPH in actual use. Moreover, the speed displayed is smoothed so don't expect it to be realtime. A good thing though is the faster you go, the more this smoothing will help you. You will get more accurate results the faster you go. Now, Differential GPS units are more accurate. For position, accuracy to a few cm vs. a few meters for conventional consumer GPS. This is what my team used in college for our autonomous helicopter. But, these units are $$$ and you need a stationary reference for them to work.
Follow Ups	Going racing & looking for help/sponsors - Dallas DamonZ 21:32:33 04/07/03 I would've let you barrow my Garmen 295 >>>> - Chickan_Z (OH) 21:41:17 04/07/03 Thanks. Is that model accurate like I discribed? - Dallas DamonZ 21:44:37 04/07/03 hey Damon, - Boris 00:08:36 04/08/03 Zweet! - Dallas DamonZ 00:14:45 04/08/03 That unit should be great> - cainmt (Toledo,OH) 16:47:09 04/10/03 Re: Going racing & looking for help/sponsors - SactoTodd 00:15:18 04/08/03 email sent (n/m) - SteamyZ(ZtoyZ.NET) 00:19:04 04/08/03 Damn, I wish I knew you planned to go ahead of time. - John(Houston) 00:35:51 04/08/03 John,,,, - RSR 07:34:14 04/09/03 Sounds like a plan to me! :) (n/m) - John(Houston) 13:13:41 04/09/03 Also - SactoTodd 00:39:26 04/08/03 the thing is, theres a minimum speed too... - niXit 07:57:40 04/08/03 2nd, there's gotts be some programs out there >>> - mm_95TT 15:51:36 04/09/03 how about a paypal link - the_real_dummy 07:59:00 04/08/03 Re: how about a paypal link - Dallas DamonZ 08:46:28 04/08/03 i don't have much, but i'll donate to the cause - the_real_dummy 10:30:59 04/08/03 We'll be shooting video, incar audio, and 2x digi cams. - niXit 10:46:55 04/08/03 youll publicly post it after right.... (n/m) - Solidpantz 00:17:28 04/09/03 Done..not much but I hope it help. (n/m) - Wui (Philly) 12:39:58 04/08/03 Thanks! (n/m) - Dallas DamonZ 13:27:22 04/08/03 Re: Going racing & looking for help/sponsors - Kyle(Houston) 12:01:57 04/08/03 Did Viagra drop you then? - Spee 13:56:30 04/08/03 You've got mail (n/m) - David 280Z 17:22:42 04/08/03 Damon - check your email. Wanna borrow my coilovers. (n/m) - Glenn (San Jose) 19:00:43 04/08/03 Garmins are spec'd for 0.1 MPH, BUT>>> - mm_95TT 15:43:13 04/09/03 This is what I'm probably going to be using>> - Dallas DamonZ 16:39:11 04/09/03 If I donate $100 can I get a sticker that saids "PE Sucks" - Carlos Ramirez 18:18:08 04/09/03 Re: If I donate $100 can I get a sticker that saids "PE Sucks" - Dallas DamonZ 19:58:21 04/09/03 I can help you with sponsors without any trouble - ATStephen 15:04:27 04/12/03 A New Car Sponsors Site - ChromaZ 10:31:00 04/13/03 an idea for you Damon - govaardz(Aruba) 07:38:38 04/14/03
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