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Utilization of the Radiofrequency Spectrum above 1 GHz by Passive Services

Published online by Cambridge University Press:  13 May 2016

Juan R. Pardo ,
Pierre J. Encrenaz  and
Daniel Breton
Juan R. Pardo*
Affiliation:
DEMIRM - Observatoire de Paris, 75014 Paris, France
Pierre J. Encrenaz
Affiliation:
DEMIRM - Observatoire de Paris, 75014 Paris, France
Daniel Breton
Affiliation:
Formerly at Centre National d'Etudes spatiales, Toulouse, France
*
1Present address: Division of Physics, Mathematics and Astronomy, California Institute of Technology, MS 320-47, Pasadena, CA 91125, USA

Abstract

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Microwave atmospheric radiometry and radio, mm and sub-mm astronomy are “passive” services, i.e. not involved in any man-made transmission but only concerned with the reception of naturally occurring radio waves. The intensity of the radiation received is not subject to human control, unlike the situation for active services. All active services operate in bands occupied by natural signals of atmospheric and cosmic origin and the active service tranmissions may be powerful enough to noticeably interfere with reception of those signals by scientific services. A conflict exists for the coexistence of active and passive services in many frequency bands, which leads to a need for regulating how to share the electromagnetic spectrum. This document gives an overview of the problems of frequency sharing in the longwave region of the electromagnetic spectrum (radio to submillimetre waves).

Type
Part 4. Threats to Radio Astronomy
Information
Symposium - International Astronomical Union , Volume 196: Preserving the Astronomical Sky , 2001 , pp. 255 - 263
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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Pardo, J.R., Serabyn, E., and Cernicharo, J., 2001, J. Quant. Spect. Radiat. Transfer, 68/4, 419–433.Google Scholar