Article: 17373 of sci.geo.satellite-nav From: "Tom Osborn" Newsgroups: sci.geo.satellite-nav Subject: Re: Handheld GPS and fast jets - velocity limit Date: Fri, 13 Jul 2001 12:45:44 +1000 Organization: Customer of Connect.com.au Pty. Ltd. Lines: 20 Message-ID: <9ilnfl$rk$1@merki.connect.com.au> References: <5c34b056.0107120056.236da7aa@posting.google.com> Reply-To: "Tom Osborn" NNTP-Posting-Host: nel11989-2.gw.connect.com.au X-Trace: merki.connect.com.au 994992437 884 203.63.125.26 (13 Jul 2001 02:47:17 GMT) X-Complaints-To: abuse@connect.com.au NNTP-Posting-Date: 13 Jul 2001 02:47:17 GMT X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Path: news.meer.net!sea-read.news.verio.net!dfw-artgen.news.verio.net!dfw-peer.news.verio.net!news.verio.net!newsfeed.mathworks.com!fu-berlin.de!newsfeed.iinet.net.au!news.per.connect.com.au!news.syd.connect.com.au!not-for-mail Xref: archive.mv.meer.net sci.geo.satellite-nav:17373 "Darren Long" wrote: > I know that GPS receivers have a maximum velocity limit. I'm > investigating handheld GPS solutions for fast jets and wonder if > anyone has any data or advice on this subject. I was once working on a LEO satellite project where the design included a GPS unit. I can't say much about it, except the spec weight was about 30 grams and LEOs orbit at about 800Km (2624580.58903939356281844165527526 feet :-) ) and about 10000 m/sec (OK, you can convert that yourself). That speeds still pretty low compared to c, and you can work out a Doppler shift if you like, too. Manufacturer was not US. TO.