The Response of the
Molonglo Observatory Synthesis Telescope
to Terrestrial Interference

D. Campbell-Wilson, G. Davidson, M.I. Large, PASA, 14 (3), 265
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Contents Page: Volume 14, Number 3

The Response of the
Molonglo Observatory Synthesis Telescope
to Terrestrial Interference

D. Campbell-Wilsontex2html_wrap_inline441
G. Davidsontex2html_wrap_inline443
M.I. Largetex2html_wrap_inline445


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Abstract:

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 843MHz, with the commercial use of the 825-845MHz 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 -173dBWmtex2html_wrap_inline455. This value is similar to that considered by the International Telecommunications Union to be detrimental to radio astronomy continuum observations at nearby frequencies.

Keywords: instrumentation:interferometers - site testing


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