VLBI global solution 2006a_astro
Astrometric global solution 2006a_astro used all available VLBI observations
at 8.6GHz and 2.2 GHz from 1979.08.03 through 2006.06.22, 4201 twenty four hour
sessions, including 25 observing sessions of the
VLBA Calibrator Survey, in total
5.4 million measurements of group delays.
Positions of 3563 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
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2006a_astro catalogue in
HTML form (7.5 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.
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2006a_astro catalogue in ASCII format.
The catalogue contains source positions, their uncertainties,
total VLBA flux density, the VLBA flux density of unresolved
components.
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2006a_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.
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2006a_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.
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Images and calibrated uv data
for 1856 sources at S-band,
1792 sources at X-band, 255 sources at K-band,
and 132 sources at Q-band in one tar.bz2 file (4.7Gb).
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.
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Gif files of maps and radplots in one tar.bz2 file for
1603 sources at S-band and 1629 sources at X-band observed
in 10 out of 11 VCS1 observing sessions. Among these sources,
approximately 300 objects were observed in another experiments and
their images in fits-format are available. These gif-files are the
only piece of information about images for 1206 sources at S-band and
1212 sources at X-band currently available.
- Interactive
calibrators search tool among sources in the 2006a_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.
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.
Statistics
Miscellaneous
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: 2006.12.22_12:18:47