VLBI global solution 2005f_astro

Astrometric global solution 2005f_astro used all available VLBI observations including 21 observing sessions of the VLBA Calibrator Survey at 8.6GHz and 2.2 GHz from 1979.08.03 to 2005.12.01, 4059 twenty four hour sessions, 5.14 millions measurements of group delays.

Positions of 3481 sources were adjusted in a single least square solution. Currently, this is the most complete catalogue of positions of compact radio sources. Technical description of the solution is available here.

Astrometric Results

  1. 2005f_astro catalogue in HTML form (7.3 Mb). NB: loading the catalogue takes time, please be patient. The catalogue contains source positions, their uncertainties, estimates of the total VLBA flux density, the VLBA flux density of unresolved components, naturally weighted CLEAN images in postscript and in fits format at X and S-band; plots of the correlated flux density as a function of the length of the baseline projection to the source plane; fits files with calibrated uv data. So far images and fluxes are available only for 1414 sources.

  2. 2005f_astro catalogue in ASCII format. The catalogue contains source positions, their uncertainties, total VLBA flux density, the VLBA flux density of unresolved components.

  3. 2005f_astro catalogue in key-format format. The catalogue contains source positions. This catalogue can be used as a priori file for VLBI SCHED scheduling software package.

  4. 2005f_astro catalogue in blokq format. The catalogue contains source positions and their uncertainties. This catalogue can be used as a priori file for Mark5 VLBI analysis software package Calc/Solve.

  5. Images and calibrated uv data of 1414 sources in one tar.bz2 file (2127Mb). Refer to readme file for the file name convention in this archive. NB: the size of this file is greater than 2Gb. Your broweser probably will not be able to download it. It is suggested to use wget-1.10 or newer for downloading this file.

  6. Interactive calibrators search tool among sources in the 2005f_astro catalogue.

Geophysics Results

Station positions and velocities

Positions of 151 stations and their velocities were estimated as global parameters. Station positions are given on epoch 1997.01.01

Station positions catalogue Format description
Station velocity catalogue Format description
Catalogue of station positions and velocities in Sinex format Format description Format amendment

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 EOB 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

Assessment of accuracy of EOP series

Comparison of EOP parameters determined from 80 simultaneous 24 hours VLBI experiments at networks CORE-A and NEOS-A.
  1. Plot of differences in X pole coordinates;

  2. Plot of differences in Y pole coordinates;

  3. Plot of differences in UT1 angles;

  4. Plot of differences in nutation in longitude;

  5. Plot of differences in nutation in obliquity;

  6. Plot of differences in X pole rates;

  7. Plot of differences in Y pole rates;

  8. Plot of differences in UT1 rates;

  9. Table of statistics of the differences.

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. Table of statistics of the differences.

Miscellaneous

Control file for batch Solve solution. Description of Solve batch control language.
Usage policy: you can download files for research purposes, you can put links to this Web page, but you cannot post any part of content of this Web page on ftp or http servers without prior written permission from authors.

Back to Goddard VLBI astrometric catalogues .
Web page was prepared by Leonid Petrov ()
Last update: 2005.12.21_05:09:07