ITU-R SA.1158-3-2003
气象卫星业务(空间-地球)和移动卫星业务(地球-空间)之间在1675-1710MHz频段的共享的可行性

Feasibility of frequency sharing in the 1 670-1 710 MHz band between the meteorological-satellite service (space-to-Earth) and the mobile-satellite service (Earth-to-space) Question ITU-R 204/7

标准号

ITU-R SA.1158-3-2003

发布日期

2003年01月01日

实施日期

废止日期

无

中国标准分类号

M18

国际标准分类号

33.060.30

发布单位

IX-ITU

适用范围

The ITU Radiocommunication Assembly, considering a) that the World Administrative Radio Conference for Dealing with Frequency Allocations in Certain Parts of the Spectrum (Malaga-Torremolinos, 1992) (WARC-92) has allocated the 1675-1710 MHz band on a primary basis in Region 2 to the mobile-satellite service (MSS) (Earth-to-space) and maintained the primary status of the meteorological-satellite (MetSat service) service (space-to-Earth); b) that each of these two services may be provided by GSO satellite systems and non-GSO satellite systems; c) that MetSat operators have agreed to separate the band 1670-1710 MHz into four sub-bands which are being used and are expected to continue to be used as follows: 1670-1683 MHz: main earth stations at fixed locations for reception of raw image data, data collection data and spacecraft telemetry from GSO meteorological satellites; 1683-1690 MHz: main earth stations at fixed locations for reception of raw image data, data collection and spacecraft telemetry from GSO meteorological satellites; user stations for direct readout from GSO meteorological satellites (GVAR and S-VISSR) (see Note 1); 1 690-1 698 MHz: user stations for direct readout services from GSO meteorological satellites; 1 698-1 710 MHz: user stations for direct readout services and prerecorded image data at main earth stations from non-GSO meteorological satellites; d) that the 1 670-1 690 MHz band is and will continue to be used primarily but not exclusively by a limited number of main meteorological earth stations (command and data acquisition (CDA)) and the 1 683-1 690 MHz part of the band is and will continue to be used also by direct readout user stations (GVAR and S-VISSR); e) that the portion 1 670-1 675 MHz of the band is used by very few main MetSat earth stations; f) that there exist thousands of MetSat earth stations in the 1 690-1 710 MHz band, many of them using small antennas; g) that for different functions provided by the MetSat service, meteorological earth stations in the 1 690-1 710 MHz band and in the 1 683-1 690 MHz band can be fixed, mobile or transportable; h) that Recommendation ITU-R SA.1027 provides sharing criteria for current MetSat systems using satellites in low-Earth orbit (LEO); j) that Recommendation ITU-R SA.1161 provides sharing criteria for current MetSat systems using GSO satellites; k) that MSS earth station transmitters are expected to be deployed near or within a MetSat service area; l) that some operators of meteorological satellites plan to increase the channel bandwidths and revise the frequency assignment plans for new MetSat generations, which would make interleaving of meteorological and mobile-satellite channels impracticable; m) that GSO MetSat space stations, which initially serve a certain area, may be relocated from time to time in order to provide coverage of another area; n) that Annexes 1, 2, 3 and 4 provide a view pertaining to the technical sharing aspects of the MetSat and MSS services operating in the 1 670-1 710 MHz band; o) that mobile-satellite techniques are either available or may be able to be developed to automatically and dynamically avoid transmissions from earth stations in the vicinity of receiving MetSat earth stations and that such techniques are described in Annex 3.