giant by lanyuehua

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									 Working Group on Geodesy and
Geographic Information (WG-GGI)

 THE GIANT PROGRAM
http://www.scar-ggi.org.au/geodesy/giant.htm
    SCAR Antarctic Geodesy
    Symposia
     Chile 1999
     Warsaw 2000
     St Petersburg - AGS 01
     Objectives :
          mid   term review of workplan
          maintain group contact
          assess progress and suggest new cooperative
           initiatives
          publish activities

Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                SCAR BACKGROUND
       ISCU Body
       Origin third IGY (1957)
       Coordinate cooperative research
       Series of specialist working groups
       Geography WG formed 1958


Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
    WG- GGI Background

     WG renamed Geodesy and
      Cartography 1960
     Renamed Geodesy and Geographic
      Information 1988
     Structural refocussed since 1992 into a
      number of sub programs
     Now has two major groupings plus an
      outreach component
Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
      ANTARCTIC GEODESY TECHNIQUES

    Intercontinental Baseline accuracies
     Astronomical fixes    +/- 400 metres
     Pageos (1969)          +/- 10 metres
     Doppler (1972)         +/- 5 metres
     Early GPS (1990)      +/- 1-2 metres
     Continuous GPS        +/- centimetres

Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                  WG-GGI PROGRAMS

       Geodetic Infrastructure (GIANT)

       Geographic Information

       Outreach (web site etc)



Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                                       GIANT

       Initially conceived 1992 as application of
        new space Geodesy to Antarctic
        mapping problems
       Space technological development now
        enables monitoring of current surface
        geodynamics


Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
     GEODETIC INFRASTRUCTURE
       OF ANTARCTICA (GIANT)
    Objectives
       Geodetic framework for science
       basis for homogeneous spatial data
       linking isolated geodetic datums
       co-location of geodetic techniques

Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
            GEODETIC FRAMEWORK

     Permanent GPS Base Stations
     Epoch GPS Campaigns
     VLBI
     DORIS
     Tide Gauges
     Absolute Gravity


Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
         Giant program components

    Permanent Geodetic                           Tide Gauge Data;
     Observatories;                               Atmospheric Impact on
    Crustal Deformation                           GPS Observations in
     Network;                                      Antarctica;
                                                  Remote Geodetic
    Physical Geodesy;                             Observatories; and
    Geodetic Control                             New Geodetic Satellite
     Database;                                     Missions

Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
    Antarctic GPS base stations



                                                               Data from Red dots
                                                                available through IGS

                                                               Data from blue dots
                                                                available on request
                                                                from individual
                                                                researchers




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
           Davis GPS and Glonass Antenna




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                 Mawson GPS Antenna




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                    Casey GPS Antenna




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                                                               Mawson GPS
                                                                data
                                                                availability




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                                                               Mawson CGPS
                                                                time series




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                    Antarctic VLBI sites




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                 Antarctic DORIS sites



                                                               Data available
                                                                from IGN or
                                                                from CDDIS




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                Absolute Gravity Sites




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                  Antarctic Tide Gauge
                       operations
                                                           IOC web site
                                                            http://ioc.unesco.org/
                                                            iocweb/default.htm
                                                           Southern Ocean
                                                            Sea level centre
                                                            http://www.ntf.flinders
                                                            .edu.au/TEXT/PRJS/
                                                            SOUTH/south.html


Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
   GLONASS orbits and
   comparisons : IGLOS Electronic Mail
      Permanent receivers at

       Davis, McMurdo, O’Higgins

      Product access : By anonymous ftp to

       http://igs.ifag.de
Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
       Difference between OSU91 &
          EGM96 Gravity Models




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
            GPS EPOCH CAMPAIGNS

       1989 -feasibility                            1995 - Major
       1990 - pilot                                 1996 Minor
       1991 - CIGNET                                1997 - Major
       1992 - Major                                 1998 Minor
        Campaign                                     1999
       1993 Minor                                   2000
       1994 Minor


Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
    Primary ITRF2000 Sites and Collocated
                Techniques




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
    Horizontal vectors from SCAR ITRF
               2000 solution




Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                           ITRF2000 Antarctic Velocities (m/yr)
                 ID         DOMES             LATv          LONv      HGTv
          7400           41705M001             0.0163        0.0189    0.0047
          ART1           66017M001             0.0161        0.0068    0.0001
          BEL1           66018M001             0.0105        0.0119    0.0347
          BELG           66018M002             0.0105        0.0119    0.0347
          BRAZ           41606M001             0.0125       -0.0039    0.0016
          CAS1           66011M001            -0.0096        0.0026    0.0037
          DAL1           66019M001             0.0142        0.0077    0.0019
          DALL           66019M002             0.0142        0.0077    0.0019
          DAV1           66010M001            -0.0048       -0.0015    0.0043
          DUM1           91501M001            -0.0081        0.0116   -0.0009
          ELE1           66021M001             0.0141        0.0062    0.0024
          ESP1           66022M001             0.0097        0.0142    0.0102
          FOR1           66023M001             0.0058       -0.0009    0.0079
          FOR2           66023M002             0.0058       -0.0009    0.0079
          FOS1           66024M001             0.0107        0.0129    0.0007
          GOUG           30608M001             0.0185        0.0202   -0.0017
          GRW1           66012M001             0.0162        0.0086    0.0075
          KERG           91201M002            -0.0031        0.0060    0.0050
          KOUR           97301M210             0.0120       -0.0045    0.0026
          LPGS           41510M001             0.0114       -0.0017    0.0011
          MAC1           50135M001             0.0304       -0.0108    0.0001

Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
                                 SUMMARY
     GIANT provides a fiducial framework of
      permanent sites
     Contemporary velocities at permanent
      and remote sites
     Linkages at fiducial sites to other
      techniques - VLBI, Tide Gauges,
      Gravity
     Contributions to global geodesy

Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
    GIANT Ongoing Strategy
      Encourage establishment of IGS
       stations and use of IGS procedures
      Open data from base stations
      Access to RINEX and SINEX results
      Produce integrated solutions for ITRF
       densification
      Official published verified results in
       ITRF
Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
    GIANT STRATEGY
    Continue as the overall linking
     mechanism for Antarctic Geodesy
    Encourage participation in building a
     combined cooperative network
    Use of one reference frame for positions
    use of web site for meta data and
     information access


Antarctic Geodesy Symposium St Petersburg 18-21 July 2001
     SCAR WG-GGI Highlights
     ADD
     Composite Gazetteer
     Map and chart catalogue
     Specifications for GIS
     Contribution to Global Map project
     Permanent network of geodetic
      observatories
     Global orbits and ITRF primary datum
     Densification of ITRF2000
     Absolute gravity
Antarctic Geodesy Symposium St Petersburg 18-21 July 2001

								
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