Steve Hilla and Jim Rohde National Geodetic Survey 2005 Convocation October 24 – 28, 2005 Holiday Inn 8777 Georgia Avenue
Changes to Pages in 2004/2005 04/2 Correct Initialization of IERS Solid Earth Tide 04/7 Read ANTEX files (ground and satellite antennas) 04/9 Read SP3-a, SP3-b, and SP3-c orbit formats 04/10 Estimate satellite antenna offsets and PCVs 05/2 Estimate position at monument (rather than L1PC) 05/4 Add Melbourne/Wubbena for Ambiguity Fixing 05/8 Update sub-daily EOP model
ANTEX Header
ANTEX: Satellite offsets and phase patterns
ANTEX: 1D Ground Antenna Pattern
Effects of IGS implementing Absolute PCVs IGS currently testing Absolute PCVs with parallel finals IGb00 heights were scaled to match ITRF (VLBI & SLR) IGS recommends avoiding radomes GPS tropo estimates should now match VLBI better Orbits should stay ~ the same due to Kepler’s Laws Regional Networks may be able to use old Relative PCVs NEVER mix absolute and relative PCVs
Future Work for Orbits/CORS Improve Ocean Loading Model in site_info Reprocess all GPS data for 1994-2005 Iterate orbit processing for IGS early years (1994-1998) Helmert Blocking software for over 800 CORS Continue to improve models in Pages for orbits/CORS Implement post-fit data editing Add the N-S, E-W Ocean Loading components to Pages Adopt ANTEX for OPUS/CORS processing Software for mixed GPS + Galileo (+ GLONASS ?) data
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