ITU-R SA 1862-2010 Guidelines for efficient use of the band 25 5-27 0 GHz by the Earth exploration-satellite service (space-to-Earth) and space research service (space-to-Earth)《地球.pdf
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1、 Recommendation ITU-R SA.1862(01/2010)Guidelines for efficient use of the band 25.5-27.0 GHz by the Earth exploration-satellite service (space-to-Earth) and space research service (space-to-Earth)SA SeriesSpace applications and meteorologyRec. ITU-R SA.1862 ii Foreword The role of the Radiocommunica
2、tion Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory an
3、d policy functions of the Radiocommunication Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R
4、/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO
5、/IEC and the ITU-R patent information database can also be found. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT B
6、roadcasting service (television) F Fixed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fix
7、ed-satellite and fixed service systems SM Spectrum management SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Public
8、ation Geneva, 2010 ITU 2010 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R SA.1862 1RECOMMENDATION ITU-R SA.1862 Guidelines for efficient use of the band 25.5-27.0 GHz by the Earth exploration-satellite servi
9、ce (space-to-Earth) and space research service (space-to-Earth) (2010) Scope This Recommendation contains guidelines for optimized use of the frequency band 25.5-27.0 GHz between a number of different space science systems, such as near-Earth and deep-space research networks, Earth exploration syste
10、ms, geostationary-satellite systems and data relay satellite networks. The Recommendation also identifies reduced power flux-density limits for geostationary satellites to offer better protection to space research missions with sensitive space-to-Earth links. It also specifies a power flux-density l
11、imit at the GSO for protection of data relay system satellites. The ITU Radiocommunication Assembly, considering a) that the band 25.5-27.0 GHz is allocated to the Earth exploration-satellite service (EESS) (space-to-Earth) and the space research service (SRS) (space-to-Earth), and the 25.25-27.50 G
12、Hz band is allocated to the inter-satellite service1(ISS); b) that EESS and SRS near-Earth missions in the 25.5-27.0 GHz band may be compatible under certain conditions; c) that the power flux-densities (PFD) at the Earths surface from SRS missions are very low for lunar missions and extremely low f
13、or sun-Earth Lagrange and deep-space missions; d) that, due to the low PFD, deep-space missions are very vulnerable to interference and have stringent protection criteria; e) that multiple administrations are planning to fly manned missions to the lunar environment and beyond; f) that manned mission
14、s have more stringent protection criteria than unmanned missions; g) that due to atmospheric attenuation, specifically rain attenuation and the power flux-density limits specified in Article 21 of the Radio Regulations (RR), it may be difficult to achieve link availabilities greater than 99.9% in th
15、e 25.5-27.0 GHz band; h) that the planned use of the 25.5 to 27 GHz band by SRS and EESS missions is most likely not compatible with manned SRS mission protection criteria specified in Recommendation ITU-R SA.609; j) that the 25.5-27 GHz band is planned to be used by EESS missions for various Earth
16、observing, Earth exploration, and climate monitoring missions; k) that the availability of the 25.5-27.0 GHz band is crucial to near-Earth SRS and EESS missions with high data rate requirements; 1Use of the 25.25-27.5 GHz band by the inter-satellite service is limited to space research and Earth exp
17、loration-satellite applications. Rec. ITU-R SA.1862 2l) that interference from transmitting geostationary satellites has the potential to significantly degrade link margins and even cause loss of sensitive links of SRS missions if these satellites operate near the currently applicable PFD limits (se
18、e Annex 1); m) that RR Article 21 limits the power flux-density at the surface of the Earth to levels between 115 and 105 dB(W/(m2. MHz) depending on the angle of arrival; n) that reducing the PFD limits below the limits specified in RR Article 21 for geostationary satellites would provide necessary
19、 protection to lunar and Lagrange SRS missions; o) that space-to-Earth links of typical non-GSO satellites can always meet the power flux-density limit required to protect a DRS satellite, while non-GSO satellites with orbits above 1 370 km may need some allowance to exceed it for a small percentage
20、 of time, recognizing a) that the space-based collection of global weather and climate data in support of the Global Earth Observation System of Systems (GEOSS) is becoming increasingly important to the worldwide community; b) that the 25.5 to 27.0 GHz band is planned to be used by manned SRS missio
21、ns for data transmissions that do not involve astronauts and vehicle safety; c) that non-GSO satellites should also comply with Recommendation ITU-R SA.1155 Protection criteria related to the operation of data relay satellite systems, recommends 1 that deep-space missions should not use the band 25.
22、5-27.0 GHz SRS (space-to-Earth) unless mission requirements cannot be satisfied in other bands specifically allocated for deep-space operations; 2 that if, for a compelling reason, a deep-space mission requires the use of the 25.5-27.0 GHz band, the mission should not claim interference protection f
23、rom near-Earth missions in excess of the protection criteria of Recommendation ITU-R SA.609 applicable to unmanned missions in the 25.5-27.0 GHz band; 3 that manned SRS missions should not claim interference protection from EESS and unmanned SRS missions in excess of the protection criteria of Recom
24、mendation ITU-R SA.609 applicable to unmanned missions in the 25.5-27.0 GHz band; 4 that to provide additional protection to lunar and Lagrange SRS missions, EESS and SRS missions in geostationary orbits should restrict their PFD levels to 115 dB(W/(m2.MHz) in the band 25.5-27.0 GHz for all angles o
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