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VLBI Data are the Basis for Orientation of Planetary Ephemerides with Respect to ICRF2 and Improvement of Other Ephemeris Parameters

Transactions of IAA RAS, issue 40, 10–15 (2017)

Keywords: Astrometry, VLBI, Ephemerides, Orientation

Abstract

The modern planetary ephemerides are based generally on ranging data of planets and spacecraft. However, the orientation of planet ephemerides with re- spect to ICRF has been made by the ICRF-based VLBI measurements of spacecraft near planets using the following two types of VLBI measurements: one component made by tracking stations from NASA DSN, and VLBA measurements. This paper shows a progress in accuracy of orientation angles (up to fractions of mas) as a result of adding new VLBI points (VLBA data), as well as an increase of the accuracy of measurements. Also, usage of these measurements allows us to improve planetary ephemerides. The orientation and the improvement were made within the new version of EPM2015 (Ephemerides of Planets and the Moon) at IAA RAS, available via the FTP server ftp://quasar.ipa.nw.ru/incoming/EPM/.

Citation

Text

BibTeX

RIS

E. V. Pitjeva. VLBI Data are the Basis for Orientation of Planetary Ephemerides with Respect to ICRF2 and Improvement of Other Ephemeris Parameters // Transactions of IAA RAS. — 2017. — Issue 40. — P. 10–15.

@article{pitjeva2017,
  abstract = {The modern planetary ephemerides are based generally on ranging data of planets and spacecraft. However, the orientation of planet ephemerides with re- spect to ICRF has been made by the ICRF-based VLBI measurements of spacecraft near planets using the following two types of VLBI measurements: one component made by tracking stations from NASA DSN, and VLBA measurements. This paper shows a progress in accuracy of orientation angles (up to fractions of mas) as a result of adding new VLBI points (VLBA data), as well as an increase of the accuracy of measurements. Also, usage of these measurements allows us to improve planetary ephemerides. The orientation and the improvement were made within the new version of EPM2015 (Ephemerides of Planets and the Moon) at IAA RAS, available via the FTP server ftp://quasar.ipa.nw.ru/incoming/EPM/.},
  author = {E.~V. Pitjeva},
  issue = {40},
  journal = {Transactions of IAA RAS},
  keyword = {Astrometry, VLBI, Ephemerides, Orientation},
  pages = {10--15},
  title = {VLBI Data are the Basis for Orientation of Planetary Ephemerides with Respect to ICRF2 and Improvement of Other Ephemeris Parameters},
  url = {http://iaaras.ru/en/library/paper/1673/},
  year = {2017}
}

TY  - JOUR
TI  - VLBI Data are the Basis for Orientation of Planetary Ephemerides with Respect to ICRF2 and Improvement of Other Ephemeris Parameters
AU  - Pitjeva, E. V.
PY  - 2017
T2  - Transactions of IAA RAS
IS  - 40
SP  - 10
AB  - The modern planetary ephemerides are based generally on ranging data
of planets and spacecraft. However, the orientation of planet
ephemerides with re- spect to ICRF has been made by the ICRF-based
VLBI measurements of spacecraft near planets using the following two
types of VLBI measurements: one component made by tracking stations
from NASA DSN, and VLBA measurements. This paper shows a progress in
accuracy of orientation angles (up to fractions of mas) as a result
of adding new VLBI points (VLBA data), as well as an increase of the
accuracy of measurements. Also, usage of these measurements allows us
to improve planetary ephemerides. The orientation and the improvement
were made within the new version of EPM2015 (Ephemerides of Planets
and the Moon) at IAA RAS, available via the FTP server
ftp://quasar.ipa.nw.ru/incoming/EPM/.
UR  - http://iaaras.ru/en/library/paper/1673/
ER  -