0 - Technical description of solution aus2003b.crf

 1 - Technique:   VLBI

 2 - Analysis Centre:
     Geoscience Australia

 3 - Software used:
     OCCAM 5.1

 4 - Data span:
     April, 1980 - October, 2003

 5 - Celestial Reference Frame: ga2002a

     a - Nature:

         extragalactic

     b - Definition of the orientation:
         NNR Constrains for the all sources of
         the ga2002a catalogue.

 6 - Terrestrial Reference Frame: ga2002a and associated
                                  ga2002a velocity field


     a - Relativity scale:

         Solar System Bary Center (SSB)

     b - Velocity of light:

         299792458 m/s

     c - Geogravitational constant:

         not applicable

     d - Permanent tidal correction:

         no

     e - Definition of the origin:

         NNT constraints on the daily basis for all
         VLBI stations under analysis excepion the TIGOCONC

     f - Definition of the orientation:

         NNR constraints on the daily basis for all
         VLBI stations under analysis excepion the TIGOCONC

     g - Reference epoch:

         1997.0

     h - Tectonic plate model:

         ga2002a velocities used as apriori

     i - Constraints for time evolution:

         None

 7 - Earth orientation:

     a - A priori precession model:

         IERS 1996

     b - A priori nutation model:

         MHB2000

     c - Short-period tidal variations in x, y, UT1:

         Model used according to: R.Eanes (2000) as in IERS
         Conventions 2000


 8 - Estimated Parameters:

     a - Celestial Frame:

         right ascension and declination of 682 sources and
         apparent proper motions in right ascension and declination  of
         682 sources


     b - Terrestrial Frame:

         Daily  x, y, z values for all sites
         with further estimation of (x0,y0,z0) referred to
         1997.0 and corresponding velocities

     c - Earth Orientation:

         xp, yp, UT1-UTC, dpsi, deps

     d - Others:

         - clock offsets and rates;
         - wet zenith tropospheric delays;
         - troposphere gradients.

         Clock offsets, wet delays and gradients were considered
         as stochastic parameters with relevant covariance
         functions