Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004smra.conf..146c&link_type=abstract
Spectrum Management for Radio Astronomy, Proceedings of the IUCAF summer school Held at Green Bank, West Viginia, June 9-14, 200
Astronomy and Astrophysics
Astronomy
Scientific paper
An account is given of the coordination of the Iridium mobile satellite system with the radio astronomy service in Europe, from the initial exploratory discussions at Jodrell Bank in 1991 to the signing of the so-called ``Interim Agreement'' in Paris in 1999. The technical issue of unwanted emissions from the Iridium downlink into the frequency band 1610.6-1613.8 MHz was not resolved, so the coordination agreement amounts to time sharing, albeit on more favourable terms for radio astronomy than agreements negotiated elsewhere. The European agreement fully recognizes the heavy use of the frequency band in European radio astronomy, and carries the promise that ``from 1 January 2006, European radioastronomers shall be able to collect measurement data consistent with the recommendation ITU-R RA.769-1.'' Some personal observations on the events are offered.
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