Pages enhancements Steve Hilla and Jim Rohde



Yüklə 455 b.
tarix06.02.2018
ölçüsü455 b.
#26124


PAGES Enhancements

  • Steve Hilla and Jim Rohde

  • National Geodetic Survey 2005 Convocation

  • October 24 – 28, 2005

  • Silver Spring, Maryland

  • 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

  • 05/7 Correct sign in pole tide model

  • 05/8 Update sub-daily EOP model

  • 05/9 Add block IIR-A, IIR-B, and IIR-M labels for ANTEX



ANTEX Header



ANTEX: Satellite offsets and phase patterns





ANTEX: 1D Ground Antenna Pattern



ANTEX: Range of Satellite Offsets



Effects of IGS implementing Absolute PCVs

  • IGS currently testing Absolute PCVs with parallel finals

  • IGb00 heights were scaled to match ITRF (VLBI & SLR)

  • “Antenna + radome” sites may change by few cm

  • IGS recommends avoiding radomes

  • GPS tropo estimates should now match VLBI better

  • Orbits should stay ~ the same due to Kepler’s Laws

  • IGS Clock files and hence PPP results will change due to shift in TRF scale

  • 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)

  • Compare Various Integer-Fixing Techniques

  • 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



Yüklə 455 b.

Dostları ilə paylaş:




Verilənlər bazası müəlliflik hüququ ilə müdafiə olunur ©genderi.org 2024
rəhbərliyinə müraciət

    Ana səhifə