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Re: [RC] [RC and GPS watches....... - oddfarmI don't know "how" it works but I drove with mine for a day just to test it when I first got it. The milage was right on. I drove my kids to school, went to the store, went to work. The milage matched the odometer on the truck. The speed sometimes took a few seconds to catch up, but once we were going, it was very acurate. I know someone will come up with, "Well you know, that is not an acurate way to test". Whatever. That is all I have to go by. Lisa Salas, The Odd Farm ----- Original Message ----- From: "Nancy Mitts" <mitts_n@xxxxxxxxxxx> To: <ridecamp@xxxxxxxxxxxxx> Sent: Monday, July 07, 2003 4:52 PM Subject: Re: [RC] [RC and GPS watches....... Timex GPS Users, I'd like to know "how" it keeps calculating distance. "Normal" GPS technology will calculate the distance from where you "were" to where you are "now" even if it loses contact with you for a while. The problem is, it does so in a straight line. Fine, if you're moving in a straight line, it's accurate. If you turn a corner (or switchback) it counts the distance cut across. So, is this watch assuming you're continuing to travel at the same speed while "out of touch" with satellites and using that distance instead of what the next satellite distance indicates? I can understand these things being close enough for training purposes, but I cringe at the thought they're being used for "official" trail measurements. Except of course, in areas where they DON'T lose contact with the satellites. Nancy MittsFrom: "Jonni Jewell" <jonnij@xxxxxxxx> The Timex GPS watch has a "feature" that when the signal goes weak, such as heavy tree cover that it keeps calculating your distance and speed, from the speed and direction you were traveling when the signal got weak. I have used mine a lot, and it is great in clouds, and does well in the woods as long as they are not constant for miles and miles. All the watch seems to need is a little sky to show once and awhile, and it keeps tracking. I attach the transmitter unit to the front of my saddle, instead of using the arm band. If I get off the horse, and get the watch any distance from the transmitter, then it will lose the reading...but I don't get off the horse much. (tho I should!) Jonni_________________________________________________________________ Protect your PC - get McAfee.com VirusScan Online http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ridecamp is a service of Endurance Net, http://www.endurance.net. Information, Policy, Disclaimer: http://www.endurance.net/Ridecamp Subscribe/Unsubscribe http://www.endurance.net/ridecamp/logon.asp Ride Long and Ride Safe!! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ridecamp is a service of Endurance Net, http://www.endurance.net. Information, Policy, Disclaimer: http://www.endurance.net/Ridecamp Subscribe/Unsubscribe http://www.endurance.net/ridecamp/logon.asp Ride Long and Ride Safe!! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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