PUL VLBI Analysis Center at Pulkovo Observatory

Pulkovo EOP and Reference Systems Analysis Center (PERSAC)

General Information

An IVS VLBI Analysis Center at the Central Astronomical Observatory at Pulkovo of the Russian Academy of Sciences, also widely known as Pulkovo Observatory, has been organized in September 2006. It's IVS acronym is PUL. The center is a part of the Pulkovo EOP and Reference Systems Analysis Center (PERSAC).

The main topics of our activity are:

• Improvement of the International Celestial Reference Frame (ICRF).
• Analisys of Earth rotation parameters (EOP) series.
• Modeling celestial pole offset (CPO) and free core nutation (FCN).

VLBI data analysis

Results of VLBI data analysis can be found at Pulkovo EOP and Reference Systems Analysis Center (PERSAC) page.

ICRF related studies and results

• OCARS catalog of optical characteristics of astrometric radio sources:

  • Reference
    • Malkin Z. A new version of the OCARS catalog of Optical Characteristics of Astrometric Radio Sources. ApJS, v. 239(2), id. 20 (2018). DOI: 10.3847/1538-4365/aae777
  • OCARS catalog files:
    • main catalog file ocars.txt
    • Gaia astrometry for OCARS sources ocars_g.txt
    • photometry data ocars_m.txt
    • cross-identification table ocars_n.txt
    • detailed source position data ocars_p.txt
    • OCARS catalog in CSV format ocars.csv

• Spherical Rectangular Equal-Area Grid (SREAG)

  • Reference
    • Malkin Z. A new equal-area isolatitudinal grid on a spherical surface. AJ, Vol. 158, No. 4, id. 158, 2019. DOI: 10.3847/1538-3881/ab3a44
  • Supporting routines:
    • GRIDPAR.FOR:   Compute parameters of the grid for a given number of rings
    • CELLPAR.FOR:   Compute the cell parameters for a given cell number
    • POS2CN2.FOR:  Compute the cell number for a given point position
    • CN2POS2.FOR:  Compute the cell center coordinates for a given cell number
    • NR2NC.FOR:  Compute the number of cells for a given number of rings
    • NC2NR.FOR:  Compute the nearest number of rings for a given number of cells

Approaches and occultations

Forthcoming mutual events of planets and astrometric radio sources are listed here.

Licensing

All the author's materials and results presented at this webpage are distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Contact:  Zinovy Malkin, malkin@gaoran.ru, zmalkin.com

Pulkovo EOP and Reference Systems Analysis Center (PERSAC)

Pulkovo Observatory homepage

Back to the top