Global VLBI solution 2008a

January 2008

Presented here is the Geographical Survey Institute's 2008a global solution. The Batch SOLVE solution used all available multi-baseline VLBI observations at 8.4 GHz (X-band) and 2.2 GHz (S-band) from April, 1980 through 03 January, 2008. This included a total of 4372 diurnal sessions. The BATCH control file gsi2008a.cnt along with databases given in gsi2008a.arc were used to generate this solution. The output spool file is gsi2008a.spl.gz. Single combined least square solution was done.

Source positions

Positions of 653 sources were estimated as global parameters. The sources that A) were observed in two or more sessions and had 40 or more good observations or B) were observed only in one session and had 25 or more good observations were included in the group of sources whose positions were estimated as global parameters. Position of all other sources were estimated in each session individually.
Source catalogue   Format description
Source positions time series   Format description

Station positions and velocities

Positions of 159 stations and their velocities were estimated as global parameters. Station positions are given on epoch 2000.01.01

Station positions catalogue   Format description
Station velocity catalogue   Format description

Earth orientation parameters

Pole coordinates X, Y, UT1 angle, and their rate, daily correction to the nutation in longitude and nutation in obliquity were estimated for each session separately.

EOP time series in Solve EOP format   Format description
EOP time series in Solve NUT format   Format description
EOP time series in IVS format   Format description
Correlations between EOP estimates   Format description

Statistics

wrms for each session   Format description

Comparison of EOP series

Comparison with IERS C04 series shows random noise with slight linear trend with scatter comparable with the accuracy of VLBI EOP series, except UT1 where the noise of IERS C04 series is dominating.
  1. Plot of the differences with IERS C04 in X pole coordinates;
  2. Plot of the differences with IERS C04 in Y pole coordinates;
  3. Plot of the differences with IERS C04 in UT1 angles;
  4. Plot of the differences with IERS C04 in nutation in longitude;
  5. Plot of the differences with IERS C04 in nutation in obliquity;
  6. Table of statistics of the differences.

Miscellaneous

Control file for batch Solve solution.   Description of Solve batch control language.
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Last update: 11/05/2014 05:00:26 (UTC)