tag:blogger.com,1999:blog-26744483.post5267272568340379818..comments2023-12-30T19:42:59.088-08:00Comments on Adventures in Fuel Economy, Energy Use, Physics, and Life: Drafting experimentKing of the Roadhttp://www.blogger.com/profile/06841601144107400103noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-26744483.post-47797553902633815212011-01-16T10:34:42.463-08:002011-01-16T10:34:42.463-08:00Vernier makes a USB GPS that can talk to the compu...Vernier makes a USB GPS that can talk to the computer as the LabQuest unit takes data. It records latitude, longitude, speed, and altitude at a maximum of 1 Hz. It will also plot it on Google Earth. I'm likely to give that a try.<br /><br />The GPS altitude is so bad (my GNS 430 is off by hundreds of feet, always erring on the high side, unfortunately) that I've never considered its accuracy for relative altitude. I'll take a look though.King of the Roadhttps://www.blogger.com/profile/06841601144107400103noreply@blogger.comtag:blogger.com,1999:blog-26744483.post-19899068268554865602011-01-16T05:13:32.190-08:002011-01-16T05:13:32.190-08:00Could you use the altitude from your GPS to make a...Could you use the altitude from your GPS to make a correction? The absolute altitude isn't very accurate but, in my experience, the relative altitude over short periods of time is quite good.Anonymousnoreply@blogger.com