Article: 107422 of sci.geo.satellite-nav From: Carsten Kurz Newsgroups: sci.geo.satellite-nav Subject: Re: EGNOS (european WAAS) starts this week!!! Date: Thu, 01 Apr 2004 21:49:18 +0200 Organization: Audio Visual Systems Lines: 25 Message-ID: <406C723E.BD891DCF@t-online.de> References: <4069d6d7$0$7832$91cee783@newsreader02.highway.telekom.at> <406C295E.4030308@nlr.nl> <406c6a11$0$9084$e4fe514c@dreader18.news.xs4all.nl> Reply-To: audiovisual@t-online.de Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: news.t-online.com 1080848971 02 26501 zayoGljr4BckWSO 040401 19:49:31 X-Complaints-To: usenet-abuse@t-online.de X-ID: XM8L58ZUre3Dx+CKL-TLtKgnfIhSUnWk0ZbCroJAtfmJL9+dFz2rEo X-Mailer: Mozilla 4.78 [de]C-CCK-MCD DT (Win98; U) X-Accept-Language: de Path: news.meer.net!sea-read.news.verio.net!dfw-artgen!peer1.stngva01.us.to.verio.net!news.verio.net!newsfeed.vmunix.org!newsfeed01.sul.t-online.de!newsmm00.sul.t-online.de!t-online.de!news.t-online.com!not-for-mail Xref: archive.mv.meer.net sci.geo.satellite-nav:107422 Edwin Wisse schrieb: > > Chris Malcolm wrote: > > You mean you *measured* the accuracy to be better than two meters, or > > that's what it said on the display? > > Good point. It was only the display message. The fact remains that > I had never seen a value below 6 meters on the display, which leads > me to believe that it is actually using augmentation. It certainly was using augmentation, but currently it seems that most manufacturers apply a too simple rule when calculating WAAS EPEs. They don't qualify corrections, but simply assume a fixed factor like Diff EPE = EPE/2 or something like this if the unit uses corrections. - carsten -- Audio Visual Systems fon: +49 (0)2234 601886 Carsten Kurz fax: +49 (0)2234 601887 Von-Werth-Straße 111 email: audiovisual@t-online.de 50259 Pulheim / Germany WGS84:N50°57'50.2" E06°47'28.5"