Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-25T19:24:42.485Z Has data issue: false hasContentIssue false
  • English
  • Français

Interference with Astronomical Observations of OH Masers from the Soviet Union’s GLONASS Satellites

Published online by Cambridge University Press:  12 April 2016

John Galt
John Galt*
Affiliation:
Dominion Radio Astrophysical Observatory, Penticton, BC, CANADA

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Measurements at the 1612 MHz OH line are necessary to identify and study an important class of highly evolved stars whose properties cannot be determined by other means. Observing at this frequency over an 18 month period has been a frustrating experience in “sharing” a small portion of the 1610-1626.5 MHz frequency allocation on a secondary basis with the Aeronautical Radionavigation Service. Transmissions from the GLONASS satellite system are so powerful that they are received in the side lobes and back lobes of the radio telescope, no matter where in the sky it is pointing as long as one satellite is above the horizon. On most days about half the observations had to be discarded to prevent spurious satellite signals from masquerading as astronomical spectral lines.

Type
Radio Frequency Interference
Information
International Astronomical Union Colloquium , Volume 112: Light Pollution, Radio Interference, and Space Debris , 1991 , pp. 213 - 221
Copyright
Copyright © Astronomical Society of the Pacific 1991

References

Anodina, T. G., 1988, “The Glonass System Technical Characteristics and Performance,” Special Committee on Future Air Navigation of the International Civil Aviation Organization, FANS/4-WP/75 (see also WP-38 and WP-70).Google Scholar
Carter, J. C., 1986, “Glosnass Observations” (Haystack memorandum), also issued as VLA Test Memorandum No. 150, National Radio Astronomy Observatory, Socorro, NM.Google Scholar
Carter, J. C, 1987, “Glonass Observations” (Haystack memorandum), also issued as VLA Test Memorandum No. 151, National Radio Astronomy Observatory, Socorro, NM.Google Scholar
Dale, S. A. and Daly, P., 1986, Recent Observations with the Soviet Union’s Glonass Navigation Satellites, Position Location and Navigation Symposium, Las Vegas (IEEE PLANS ’86) p. 20.Google Scholar
Dale, S. A., Daly, P. and Kitching, I. D., 1988, “Understanding Signals from Glonass Satellites,” International Journal of Satellite Communications, Vol. 6, No. 3 (to appear).Google Scholar
Daly, P., 1988a, private communication.Google Scholar
Daly, P., 1988b, “Aspects of the Soviet Union’s Glonass Satellite Navigation System,” Journal of Navigation, Vol. 41, p. 186.Google Scholar
Galt, J. A. and Kwok, S., 1988, “A Search for 1.612 GHz OH Emission from IRAS Sources,” J. Roy Astron. Soc. Can. (in press).Google Scholar
Herman, J. and Habing, H. J., 1985, “Time Variations and Shell Sizes of OH Masers in Late-Type Stars,” Astron. Astrophys. Suppl. Ser. 59, p. 523.Google Scholar
IAU, 1988, “Proceedings of the Twentieth General Assembly,” of the International Astronomical Union, Baltimore, 1988, D. Reidel Publishing Company (in press).Google Scholar
Klass, P. J., 1987, “British Scientists Reveal Signal Format of Soviet Navsat,” Aviation Week & Space Technology, Apr. 13, p. 109.Google Scholar
Pankonin, V., Brundage, W. D., Carter, J. C. and Davis, M. M., 1985, “Interference to Radio Astronomy from Glonass Transmissions in the Frequency Band 1600 -1615 MHz,” VLA Test Memorandum No. 146, National Radio Astronomy Observatory, Socorro, NM.Google Scholar
van den Bergh, S., 1988, “The Effects of Space Debris and Satellite Interference on Astronomy,” Proc. International Colloquium on “Environmental Aspects of Activities in Outer Space – State of the Law and Measure of Protection,” Cologne, May 17.Google Scholar