VLBI global solution 2007a_astro

Astrometric global solution 2007a_astro used all available VLBI observations at 8.6GHz and 2.2 GHz from 1979.08.03 through 2007.02.01, 4337 twenty four hour sessions, including 26 observing sessions of the VLBA Calibrator Survey, in total 5.8 million measurements of group delays.

Positions of 3649 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. 2007a_astro catalogue in HTML form (9 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 estimates of correlated flux densities are available only for 1856 sources.

  2. 2007a_astro catalogue in ASCII format. The catalogue contains source positions, their uncertainties, total VLBA flux density, the VLBA flux density of unresolved components.

  3. 2007a_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. 2007a_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 for 3984 sources at S, C, X, U, K and Q bands in one tar.bz2 file (19 Gb). For some of the sources images for more than one epoch are available. Refer to readme file for the file name convention in this archive. NB: the size of this file is greater than 2Gb. Your browser 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 2007a_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. Boundary conditions were selected in such a way that source positions, station positions and velocities are compatible with USNO series of the Earth orientation parameters finals.all and finals.daily.

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 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

Statistics

wrms for each session Format description
List of detected sources at X/S at each session  
List of detected sources at X-band at each session  
List of observed sources at S-band at each session  
Summary of detected sources at X/S  
Summary of observed sources at X-band  
Summary of observed sources at S-band  

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 ()
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