Advertisement

Ground-based verification of four-way Doppler measurement for the SELENE mission

  • H. Noda
  • K. Asari
  • N. Namiki
  • T. Iwata
  • Y. Kono
  • H. Hanada
  • N. Kawano
  • Z. Yamamoto
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 128)

Abstract

In Japan’s lunar mission called SELENE (SE-Lenological and ENgineering Explorer), detailed measurements of the lunar gravity field will be made by using two methods. The first is the differential VLBI measurement with two sub-satellites, and the second is the four-way Doppler measurement by using a sub-satellite which relays radio waves from the main lunar orbiter. The lunar far-side gravity field will be directly measured for the first time by using the second method, which will give us new information about the inner structure of the Moon. For the four-way Doppler measurement, the confirmation of the link establishment is an important issue because there is no telemetry relay from the main satellite to the sub-satellite in SELENE. The instruments are now under development, and a compatibility test of the instruments to the ground antenna station was carried out in March 2003. We have applied recently proposed algorithms for the confirmation of the link establishment and confirmed that they work successfully for data obtained during this test. The accuracy of the 2- and 4-way Doppler measurement are also measured and confirmed to be the expected level.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Asari, K., et al., (2003) New methods to monitor a Satellite-to-Satellite 4-way link (in Japanese), IEICE Trans., J86-B, No. 11, 2328–2335Google Scholar
  2. Floberghagen, R. K. et al. (1999) Regularisation of lunar gravity field solutions, Adv. Space Res., 23(11), 1801–1807CrossRefGoogle Scholar
  3. Konopliv, A. S. et al. (2001) Recent gravity models as a result of the Lunar Prospector mission, Icarus, 150, 1–18CrossRefGoogle Scholar
  4. Lemoine, F. G. R. et al. (1997) A 70th degree lunar gravity model (GLGM-2) from Clementine and other tracking data, J. Geophys. Res., 102, 16339–16359CrossRefGoogle Scholar
  5. Lorell, J. and W. L. Sjogren (1968) Lunar gravity: preliminary results from Lunar Orbiter, Science, 159, 625Google Scholar
  6. Matsumoto, K. et al. (1999) Impact of far-side satellite tracking on gravity estimation, Adv. Space Res., 23(11), 1809–1812CrossRefGoogle Scholar
  7. Matsumoto, K. et al. (2003) Anticipated accuracy of lunar gravity field model from RSAT/VRAD mission, Abstract of lUGG 2003.Google Scholar
  8. Namiki, N. et al. (1999) Selenodetic experiments of SELENE: relay satellite, differential VLBI, and laser altimeter, Adv. Space Res., 23(11), 1817–1820CrossRefGoogle Scholar
  9. Sasaki, S. et al. (1998) SELENE Mission: Scientific Objectives (abstract), Proc. 21st Ilnter. Sympo. Space Tech. Sci., 98-i-01Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • H. Noda
    • 1
  • K. Asari
    • 1
  • N. Namiki
    • 2
  • T. Iwata
    • 3
  • Y. Kono
    • 1
  • H. Hanada
    • 1
  • N. Kawano
    • 1
  • Z. Yamamoto
    • 4
  1. 1.Department of Earth RotationNational Astronomical Observatory of JapanMizusawa, IwateJapan
  2. 2.Kyushu UniversityFukuokaJapan
  3. 3.National Space Development AgencyTsukuba, IbaragiJapan
  4. 4.Institute of Space and Astronautical ScienceSagamihara, KanagawaJapan

Personalised recommendations