Article: 10971 of sci.geo.satellite-nav Message-ID: <3C436492.920F765D@FinalApproach.net> From: Jack Yeazel Organization: Un-organized X-Mailer: Mozilla 4.74 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: sci.geo.satellite-nav Subject: Re: historical evolution of postion determination(was:FindingLatatude in Northern Hemisphere) References: Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Lines: 22 X-Complaints-To: abuse@usenetserver.com X-Abuse-Info: Please be sure to forward a copy of ALL headers X-Abuse-Info: Otherwise we will be unable to process your complaint properly. NNTP-Posting-Date: Mon, 14 Jan 2002 18:03:16 EST Date: Mon, 14 Jan 2002 18:06:58 -0500 Path: news.meer.net!sea-read.news.verio.net!dfw-artgen.news.verio.net!dfw-peer.news.verio.net!news.verio.net!stl-feed.news.verio.net!news.cc.ukans.edu!logbridge.uoregon.edu!hub1.nntpserver.com!peer1-sjc1.usenetserver.com!fs01-sjc1.usenetserver.com!usenetserver.com!filter.west.usenetserver.com!filter.usenetserver.com!e3500-atl2.usenetserver.com.POSTED!53ab2750!not-for-mail Xref: archive.mv.meer.net sci.geo.satellite-nav:10971 Bob Gross wrote: > > When I had a ten-hour layover between Heathrow and Gatwick, I figured that I > had to go to the ROG to pay homage, just like all of the GPS receiver owners > who went before me. If you saw "Longitude", then you have to go. My GPS > receiver said Longitude 0.00000. I have to say this is strange, because the Longitude of the Airy Transit line is at "N 51° 28' 40.1247" W 00° 00' 05.3101" (about 100 meters of west longitude and easily measured with a hand-held GPS)... See: http://joe.mehaffey.com/greenwich.htm When GPS was set to zero Greenwich longitude, it was set at the equator which induces and error at Greenwich due to the Greenwich datum not being earth-centered... -- Jack Get general GPS information at http://joe.mehaffey.com/