VLBI global solution rfc_2022a

Astrometric global solution rfc_2022a used all available VLBI observations at 8.6GHz and 2.2 GHz, as well at 5 and 22GHz from 1980.04.11 through 2022.03.24, in total 8026 observing sessions, including 959 observing sessions of 64 dedicated absolute astrometry programs.

In total, 21,694,473 estimates of group delays were used in LSQ solutions.

Positions of 20,499 sources were adjusted in a single solutuion that includes X/C and X/S dual-band as well single band group delays X-band, S-band, C-band, and K-bands. is the most complete catalogue of positions of compact radio sources. Technical description of the solution is available here.

The contents of this web page and following links contain unpublished material. The material is provided as a courtesy for preview. Using this material in publications, copying, and posting on Internet is not allowed without written prior permission.

Astrometric Results

  1. rfc_2022a catalogue in HTML form (58 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. Images and estimates of correlated flux densities are available for 17,410 sources from this catalogue.
  2. rfc_2022a catalogue in ASCII format. (3 Mb) The catalogue contains source positions, their uncertainties, total VLBA flux density, the VLBA flux density of unresolved components.
  3. rfc_2022a 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. rfc_2022a catalogue in blokq format. The catalogue contains source positions and their uncertainties. This catalogue can be used as a priori file for library VTD and VLBI analysis software package Post-Solve.
  5. Interactive VLBI calibrator search tool among sources in the rfc_2022a catalogue.

Observing campaigns statistcs

  1. Brief campaign description
  2. Statistics of the number of sources observed and detected per campaign.
  3. List of sources that were observed only in a given campaign
  4. List of campaigns a given source was observed
  5. Statistics of detections per campaign

Astrophysics Information

  1. 111,981 Images and calibrated uv data for 17433 compact sources at S, C, X, U, K, Q, and W bands in one compressed tar.bz2 file is available (157 Gb). For many sources images for more than one epoch are available.
  2. Single dish spectrum for 17,352 sources from published results determined with the use of the CATS database. NB: the estimates of flux density are NOT simultaneous. Since the majority of sources are variable, these estimates of the spectrum are not always reliable. Estimates of spectrum for some sources may be wrong due to errors in the database of singe dish flux measurements.

Geophysics Results

Station positions and velocities

Positions of 203 stations and their velocities were estimated as global parameters. Station positions are given on epoch 2000.01.01. 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
Empirical model of aharmonic non-linear site motion Format description
Empirical model of harmonic site motion Format description

Antenna axis offsets

Antenna axis offsets from LSQ estimation     rfc_2022a.axof

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 ERM format Format description
EOP harminic consituents in HEO format Format description