On Thu, 29 Dec 2005 07:51:19 +0100, Terje Mathisen <[EMAIL PROTECTED]> wrote:
>David L. Mills wrote: >> GLONASS and P-code capabilities are available for some high-end geodetic >> receivers. Neither one of us can afford to buy them. By the way, GLONASS >> uses a different geodetic than GSS WG84. Their web site says a >> parameter conversion is not available. I assume Galileo will use WG84. I >> see GLONASS uses FDMA, while GPS and presumably Galileo uses CDMA. I >> assume that would make multichannel receivers for GLONASS hugely expensive. > >Yes. > >Check Ashtech. (Currently owned by Thales Navigation): > > http://products.thalesnavigation.com/en/ > >Used on all Royal Carribean cruise ships, some of them were installed by >a friend of mine. > >The (electronic) maps they use are still 10+ m wrong in some harbours >though! Or they can be 17+ miles! wrong if the antenna cable is disconnected and nobody notices: http://catless.ncl.ac.uk/Risks/24.03.html#subj4 "the level of faith placed in a GPS and chartplotter scares me." _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
