Astrogeo Center

Astronomy

• Results:
  • Radio Fundamental Catalogue of compact radio sources. Provides positions, maps, and estimates of the correlated flux density for over 7000 extragalactic sources.
  • VLBI Calibrator search engine allows to find compact radio sources useful as a calibrator for VLBI experiments within the specified search radius of the target objects.
  • The VLBI image database of compact radio sources. Provides over 32,000 images of active galaxy nuclei in radio waves.

• On-going and completed astronomy projects.

Space geodesy

• Geodetic solutions using all VLBI observations. Provide station positions, the parameters of their motion, source coordinates, Earth orientation parameters, etc.
• The atmospheric pressure loading service for computing displacements for ∼ 700 sites.
• Service of the atmospheric contribution to the geopotential.
• Harmonic station position variations determined by VLBI.
• Empirical Earth Rotation model derived from analysis of VLBI observations from 1984 through 2009.

Software

• VLBI processing software PIMA that performs initial calibration for sampler distortion, system temperature, antenna gain, phase calibration, complex bandpass calibration and evaluate group delays, phase delay rate, group delay rate and phase of the cross-correlation.
• The VTD library of routines for computing VLBI path delay and Doppler shift with the highest accuracy.
• Software package sotid for computing displacements caused by solid Earth tides.
• Program sur_sked for scheduling VLBI experiments of astrometry survey mode.
• Library petools — a toolkit for astronomy and space geodesy software.
• Library fourpack — a set of routines that impement a convenient interface to Fast Fourier Transform libraries, perform linear filtration with the use of FFT; compute tuning parameters for FFTW.
• Library gvh — the database hanlder of geodetic and absolute astrometry VLBI observations.

This web page was prepared by Leonid Petrov ()
Last update: 2013.04.19_23:57:26