Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..807c&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 106, no. 701, p. 807-812
Astronomy and Astrophysics
Astronomy
8
Glonass, Hydroxyl Emission, Line Spectra, Radio Astronomy, Radio Frequency Interference, Astronomical Observatories, Computer Programs, Infrared Stars, Milky Way Galaxy, Signal To Noise Ratios, Stellar Spectra, Telescopes
Scientific paper
Transmissions from the Global Navigation Satellite System (GLONASS) satellites have had a disastrous effect on astronomical observations of the 1612 MHz hydroxyl line. At Hartebeesthoek a number of steps were taken to circumvent this problem so that monitoring of OH/IR stars could continue. Techniques were developed for correcting affected spectra; severely degraded spectra were discarded. To monitor the transmissions from the satellites we constructed an independent receiver system. Software was developed for efficiently predicting the best inteference-free periods for observations. If the full astrophysical potential of the 1612 MHz line for the study of objects in the Milky Way is to be realized, it will be necessary to maintain a 5 MHz wide interference-free band around the line.
Combrinck Willem Ludwig
Gaylard J. J.
West Mark E.
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