ITU-R REPORT SA.2190-2010 Study on compatibility between the mobile service (aeronautical) and the space research service (space-to-Earth) in the frequency band 37-38 GHz
Earth stations for the space research service (SRS) have very sensitive receivers. To protect these (deep-space and near-Earth) SRS earth stations from interference, the ITU has published protection criteria in Recommendation ITU-R SA.1157 for the 2 GHz, 8 GHz, 13 GHz and 32 GHz bands. For the 37-38 GHz band, Recommendation ITU-R SA.1396 gives the SRS earth station protection criterion as ?217 dBW/Hz not to be exceeded more than 0.1% of the time for unmanned missions and 0.001% of the time for manned missions. This limit is applicable for both the deep-space and near-Earth SRS missions. The analyses in § 2 show that since the range of an aircraft transmitter is much less than the range of SRS missions (see Table 1), interference from a transmitter in the aeronautical mobile service (AMS) to an SRS earth station receiver can significantly exceed the SRS earth station protection criteria.
ITU-R REPORT SA.2190-2010 Referenced Document
ITU-R M.1583-1 Interference calculations between non-geostationary mobile-satellite service or radionavigation-satellite service systems and radio astronomy telescope sites
ITU-R S.465-5 Reference Earth-Station Radiation Pattern for Use in Coordination and Interference Assessment in the Frequency Range from 2 to About 30 GHz
ITU-R SA.1016 Sharing Considerations Relating to Deep-Space Research
ITU-R SA.1344 Preferred frequency bands and bandwidths for the transmission of space VLBI data within existing space research service (SRS) allocations
ITU-R SA.1396 Protection Criteria for the Space Research Service in the 37-38 GHz and 40-40.5 GHz Bands
ITU-R SA.1811 Reference antenna patterns of large-aperture space research service earth stations to be used for compatibility analyses involving a large number of distributed interference entries in the bands 31.8-32.3 GHz and 37.0-38.0 GHz
ITU-R SA.509 Space research earth station and radio astronomy reference antenna radiation pattern for use in interference calculations, including coordination procedures, for frequencies less than 30 GHz
ITU-R REPORT SA.2190-2010 history
2010ITU-R REPORT SA.2190-2010 Study on compatibility between the mobile service (aeronautical) and the space research service (space-to-Earth) in the frequency band 37-38 GHz