NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: GPS ground stations
From: Fred Hebard
Date: 2014 May 15, 10:03 -0400
From: Fred Hebard
Date: 2014 May 15, 10:03 -0400
The Wikipedia article is fairly comprehensive, and well documented, http://en.wikipedia.org/wiki/Wide_Area_Augmentation_System WAAS requires its own satellites and ground stations. The article mentions some efforts in India and Europe to develop WAAS for their regions. The original covered North America. I would expect Russia to use its own Glonass system rather than the GPS system as the foundation for a WAAS-type installation. The primary purpose of WAAS is to assist airplane landings. So it would not be WAAS itself that the Russians are threatening to close. There are other dGPS systems, some run by private corporations. John Deere's Starfire system appears to be world-wide. Perhaps one of their ground stations was in Russia. Fred Hebard mbiew@comcast.net On May 15, 2014, at 9:31 AM, Alexandre Eremenko wrote: > > Fred, > Thanks for your explanation, > > > As of October 2007 there were 38 WRSs: twenty in the contiguous United States (CONUS), seven in Alaska, one in Hawaii, one in Puerto Rico, five in Mexico, > > and four in Canada.[6][7] > > It is interesting whether there are any in Russia. > Otherwise what are the Russians threaten to close? > > > Alex. > > > : http://fer3.com/arc/m2.aspx?i=127761 >
