Re: [time-nuts] [Fwd: Accurate Thunderbolt position]

2009-07-15 Thread J. Forster
Mark Sims hol...@hotmail.com wrote: My Ashtech Z12 system has located my g-spot to within 4mm lat/lon and 27mm altitude. I forwarded the full post to a good friend who knows a LOT about GPS and herewith is his reply: The Z-12 is an excellent receiver and should determine lat. lon. within 4

[time-nuts] [Fwd: Accurate Thunderbolt position]

2009-07-15 Thread Mark Sims
The NGS OPUS GPS processing system has two versions. OPUS-S is a static version that processes long data sets (over 2 hours) using only three CORS base stations. It calculates the three base lines and says you are in the middle of where they land. They report the position error as the

Re: [time-nuts] [Fwd: Accurate Thunderbolt position]

2009-07-15 Thread Lux, James P
-Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of J. Forster Sent: Wednesday, July 15, 2009 10:54 AM To: time-nuts@febo.com Subject: Re: [time-nuts] [Fwd: Accurate Thunderbolt position] Mark Sims hol...@hotmail.com wrote: My Ashtech