Astrogeo Center

Astronomy

• Results:
  • Radio Fundamental Catalogue of compact radio sources. Provides positions, maps, and estimates of the correlated flux density for over 20,000 extragalactic radio 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. It provides over 100,000 images of more than twenty thousands active galaxy nuclei in radio waves.

• On-going and completed astronomy projects.

Space geodesy

• The Network Earth Rotation Service
• Service of crustal deformations caused by mass loading. Updated hourly. Includes mass loading caused by
  1. Ocean tides
     
  2. Non-tidal ocean bottom pressure variations
     
  3. Atmosphere pressure variations
     
  4. Land water storage changes
     
• Service of the atmospheric contribution to the geopotential.
• International Path Delay Service.
• Atmospheric angular momentum online service.
• Geodetic solutions using all VLBI observations. Provide station positions, the parameters of their motion, source coordinates, Earth orientation parameters, etc.
• Harmonic station position variations determined by VLBI.
• Empirical Earth Rotation model derived from analysis of VLBI observations.
• Harmonic variations in the Earth Rotation determined using VLBI

Software

• VLBI analysis software
• Software package sotid for computing displacements caused by solid Earth tides.
• Package malo for computation of curstal deformation caused by mass loading.
• Package spd for computation of path delay in the neutral atmsosphere using numerical weather models.

Web page was prepared by Leonid Petrov ()
Last update: 2025.02.16_21:25:48