Response of the Molonglo Observatory Synthesis Telescope to terrestrial interference

Details Response of the Molonglo Observatory Synthesis Telescope to terrestrial interference Response of the Molonglo Observatory Synthesis Telescope to terrestrial interference

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasa...14..265c&link_type=abstract

Publications Astronomical Society of Australia, vol. 14, no. 3, p. 265-273

Astronomy and Astrophysics

Astronomy

1

Interferometers, Site Testing

Scientific paper

In conjunction with the Australian Government's Spectrum Management Agency, experimental tests have been carried out to determine the susceptibility of the Molonglo Observatory Synthesis Telescope (MOST) to interference from terrestrial transmitters. The motivation for the tests was to reconcile the conflicting requirements of the MOST, which is committed to an extensive survey of the southern sky at 843 MHz, with the commercial use of the 825-845 MHz band, which is being prepared for sale. The tests show that the far sidelobe gain of the MOST, relative to an isotropic antenna is generally less than 1, and that an appropriate interference criterion would be that in-band interference irradiance should not exceed -173 dB W m^-2^. This value is similar to that considered by the International Telecommunications Union to be detrimental to radio astronomy continuum observations at nearby frequencies.

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