1、 Recommendation ITU-R SA.1414-1(12/2013)Characteristics of data relay satellite systemsSA SeriesSpace applications and meteorologyii Rec. ITU-R SA.1414-1 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spect
2、rum 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 and policy functions of the Radiocommunication Sector are performed by World and Regional Radiocommunication
3、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/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be used for the submission of patent stateme
4、nts 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/IEC and the ITU-R patent information database can also be found. Series of ITU-R Recommendations (Also ava
5、ilable 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 Broadcasting service (television) F Fixed service M Mobile, radiodetermination, amateur and related satellit
6、e 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 fixed-satellite and fixed service systems SM Spectrum management SNG Satellite news gathering TF Time signals
7、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 Publication Geneva, 2014 ITU 2014 All rights reserved. No part of this publication may be reproduced, by any mean
8、s whatsoever, without written permission of ITU. Rec. ITU-R SA.1414-1 1 RECOMMENDATION ITU-R SA.1414-1 Characteristics of data relay satellite systems (Question ITU-R 118/7) (1999-2013) Scope This Recommendation provides parameters for data relay satellite (DRS) systems worldwide to be used as guida
9、nce for deriving sharing criteria and coordination thresholds. Rec. ITU-R SA.1414 The ITU Radiocommunication Assembly, considering a) that data relay satellite (DRS) systems operate as described in Recommendation ITU-R SA.1018 Hypothetical reference system for systems comprising data relay satellite
10、s in the geostationary orbit and user spacecraft in low-Earth orbits; b) that there is an increase in mission requirements and in space research activity conducted particularly in low-Earth orbit; c) that DRS provide support to many programmes/missions in the space research service and are vital to
11、supporting both manned and unmanned space research telecommunications; d) that it is necessary to establish relevant criteria for sharing between DRS systems and other services operating in co-frequency bands; e) that the technical characteristics of representative DRS systems need to be considered
12、in order to derive relevant sharing criteria, recommends 1 that the characteristics of DRS systems, as described in Annex 1, may be used in interference sharing studies; 2 that the information provided in Annex 1 should also be used as guidance for deriving sharing criteria and coordination threshol
13、ds as appropriate for DRS systems. 2 Rec. ITU-R SA.1414-1 Annex 1 Characteristics of existing Data Relay Satellite (DRS) systems TABLE 1 Forward Earth-to-DRS feeder link characteristics Transmitting earth station Network Russian Federation United States of America Europe Japan China Location Russian
14、 Federation(1)United States of America(1)Europe Japan China Frequency range (GHz) 14.5-15.34 selectable 14.6-15.25 selectable 28.6-29.8 selectable 29.5-31 selectable 29.4-30.2 selectable Link description Forward feeder-links Ku-band(5)Composite(2)Decentralized(3)Decentralized(3), (4)Composite(7)Tran
15、smission rate 90 Mbit/s 25 Mbit/s 10 Mbit/s 50 Mbit/s 100 Mbit/s Modulation QPSK/SSM(6), QPSK PSK PSK Polarization Left-hand circular Linear Linear Circular Linear Antenna size (m) 13.1 18.3 3 and 9 5, 9.2 and 13 3, 12 and 15 Tx antenna gain (dBi) 63.3 66.4 57.6 and 67.6 63, 68.2 and 71.4 56.9, 68.2
16、 and 70.1 Tx antenna radiation pattern Rec. ITU-R S.580 RR Appendix 8, Annex III Necessary bandwidth (MHz) 80 per channel 650 (composite) 100 978 (composite) 800 (composite) Maximum power spectral density (dB(W/Hz) 52.8 58 38 32.5 47 Maximum e.i.r.p. spectral density (dB(W/Hz) 10.5 8.8 19.6 38.9 23.
17、1 Receiving DRS Orbital locations 160W, 16W, 95E, 167E Rec. ITU-R SA.1275 or Rec. ITU-R SA.1276 Antenna size (m) 0.6 1.8 0.4 2.0 1.5 Rx antenna gain (dBi) 36 47.0 40.2 53 49.5 Rx antenna radiation pattern Rec. ITU-R S.672 System noise temperature (K) 550 977 1 305 890 and 579 1 318 Link availability
18、 (%) 99.9 99.9 99.9 99.9 99.9 Interference criterion Rec. ITU-R SA.1155 (1)The earth stations for the Russian Federation network are located within the territory of the Russian Federation. The earth stations for the United States of America network are located in White Sands (New Mexico), Blossom Po
19、int (Maryland) and Guam. The coordinates of the stations are: 32.5 N, 106.60 W for White Sands; 38.43 N, 77.08 W for Blossom Point; and 13.62 N, 144.86 E for Guam. (2)The composite link for the United States of America network is composed of seven channels: One DRS command and ranging channel, one D
20、RS pilot tone signal, one S-band (2 GHz) multiple access (S-MA) link, two S-band single access (S-SA) links and two Ku-band (14/11 GHz and 30/20 GHz) single access (K-SA) links. (3)The European DRS ground system consists of 12 earth stations, including the TT RHC right-hand circular. 4 Rec. ITU-R SA
21、.1414-1 TABLE 2 (end) Receiving spacecraft Network Russian Federation China United States of America Europe Japan United States of America Russian Federation China Russian Federation United States of America Europe Japan United States of America China Orbital locations Mainly low-Earth orbit Frequen
22、cy range (GHz) 2.025-2.110(3)2.090-2.098 2.103-2.110 2.025-2.110(1)13.4-13.8 13.750-13.800 22.55-23.55 Antenna size (m) Omnidirectional, arrays Omnidirectional, arrays, parabolic = 1.5 Omnidi-rectional, arrays, parabolic = 0.8 1.2 1.5 1.3 1.3 0.8 Rx antenna gain (dBi) 1.5 / 7.2 11 1.5 27.3 27.1 27.3
23、 11 15 40.8 44 47 48.9 47 43 Rx antenna radiation pattern Rec. ITU-R S.672 for high gain antenna Rec. ITU-R S.672 System noise temperature (K) 450 600 600 600 680 600 450 600 550 1 000 1 400 850 1 400 1 400 Required Eb/N0(dB) 10.6 9.5 9.5 9.5 10.5 9.5 10.6 9.5 10.6 9.5 9.5 10.8 9.5 9.5 Required BER
24、1 1061 1061 1051 1061 1061 1051 1061 1061 1061 1051 1061 1051 106Link reliability (%) 99.9 99.9 99.99 99.9 99.9 99.99 99.9 99.9 99.9 99.9 99.9 99.9 99.9 Interference criterion Rec. ITU-R SA.1155 SQPN: Staggered quadriphase pseudo-random noise; SSM: Spread-spectrum modulation. (1)Transmit frequency i
25、s selectable in 5 MHz steps, 500 221/240 kHz steps for the Russian Federation DRS, 1 MHz steps for Chinese DRS. (2)Signals with low data rate transmissions will be spread by a pseudo-random noise code so as to meet pfd limits. (3)For the Russian Federation DRS transmit frequency is selectable in 500
26、 221/240 kHz steps. Rec. ITU-R SA.1414-1 5 TABLE 3 Return spacecraft-to-DRS link characteristics Transmitting spacecraft Network Russian Federation China United States of America Europe Japan United States of America China Russian Federation Russian Federation United States of America Europe Japan U
27、nited States of America China Orbital locations Mainly low-Earth orbit Frequency range (GHz) 2.200-2.290(3)2.270-2.278 2.284-2.291 2.200-2.290(1)14.76-15.34 14.891-15.116 25.25-27.50 Link description Multiple access (S-MA) links Single access (S-SA) links Single access (Ku-SA) links Single access (K
28、a-SA) links Transmission rate 1 kbit/s 300 kbit/s 3 Mcps 3 Mbit/s 1 Mbit/s 12 Mbit/s 6 Mbit/s 2 Mbit/s 64 kbit/s 90 Mbit/s 300 Mbit/s 150 Mbit/s 300 Mbit/s 800 Mbit/s 600 Mbit/s Modulation QPSK/SSM PSK SQPN/PSK(2)PSK QPSK/SSM QPSK PSK Polarization RHC LHC LHC Circular RHC RHC CircularAntenna size (m
29、) Omnidirectional, arrays Omnidirectional, arrays, parabolic = 1.5 Omnidi-rectional, arrays, parabolic = 0.8 Omnidi-rectional, arrays, parabolic = 1.5 1.2 1.5 1.9 1.5 0.8 Tx antenna gain (dBi) 1.5 / 7.2 11 15 27.3 27.6 27.3 15 11 42.2 43 47 49.7 47 44.5 Tx antenna radiation pattern Rec. ITU-R S.672
30、for high gain antenna Rec. ITU-R S.672 Necessary bandwidth (MHz) 6 8 6 6 20 6 20 6 80 per channel 225 300 300 650 600 Maximum power spectral density (dB(W/Hz) 55.8 46 60.8 51 55.7 60.8 46 55.8 71.5 73.5 65.1 58.8 67.5 50 Maximum e.i.r.p. spectral density (dB(W/Hz) Compliant with pfd limits 29.3 30.5
31、 23 9.1 20.5 5.5 6 Rec. ITU-R SA.1414-1 TABLE 3 (end) Receiving DRS Network Russian Federation China United States of America Europe Japan United States of America China Russian Federation Russian Federation United States of America Europe Japan United States of America China Orbital locations 16W,
32、95E, 167E Rec. ITU-R SA.1275 or Rec. ITU-R SA.1276 16W, 95E, 167E 160W, 16W, 95E, 167E Rec. ITU-R SA.1275 or Rec. ITU-R SA.1276 Frequency range (GHz) 2.200-2.290(1)2.270- 2.278 2.284-2.291 2.200-2.290(1)14.76-15.34 14.891-15.116 25.25-27.50 Antenna size (m) Horn Phased array 2.8 3.6 4.9 4.2 4 4 4.9
33、2.8 3.6 4.9 4.2 Rx antenna gain (dBi) 14.8 27 30.0 34.7 37.2 36.8 36.5 35.7 52.6 52.6 53.4 58.8 55.9 57.5 Rx antenna radiation pattern Rec. ITU-R S.672 Rec. ITU-R S.672 Rec. ITU-R S.672 System noise temperature (K) 450 741 478 590 404 537 741 550 550 661 1 305 475 870 1 000 Link reliability (%) 99.9
34、 99.9 99.99 99.9 99.99 99.9 99.9 99.9 99.9 99.9 99.9 99.9 Interference criterion Rec. ITU-R SA.1155 (1)Transmit frequency is selectable in 5 MHz steps for United States of America DRS, 100 kHz steps for Japanese DRS, 500 kHz for the Russian Federation DRS, 1 MHz steps for Chinese DRS. (2)Signals wit
35、h low data rate transmissions will be spread by a pseudo-random noise code so as to meet pfd limits. Rec. ITU-R SA.1414-1 7 TABLE 4 Return DRS-to-Earth feeder link characteristics Transmitting DRS Network Russian Federation United States of America Europe Japan China Orbital locations 160W, 16W, 95E
36、, 167E Rec. ITU-R SA.1275 or Rec. ITU-R SA.1276 Frequency range (GHz) 10.7-10.95, 11.45-11.7, 12.5-12.75 13.4-14.05 18.1-21.2 19.7-21.2 18.9-21.2 Link description Ku-band (14/11 GHz) return feeder Ku-band (14/11 GHz) return feeder Ka-band (30/20 GHz) return feeder Transmission rate (Mbit/s) 150(3)(1
37、) (2) (2) (4) Modulation QPSK, QPSK/SSM PSK SQPN/PSK PSK Polarization RHC Linear Circular Linear Antenna size (m) 0.6 2 0.4 2.0 1.5 Tx antenna gain (dBi) 34.3 44.8 40.2 49.5 46.4 Tx antenna radiation pattern Rec. ITU-R S.672 Necessary bandwidth (MHz) 150 per channel 650 (composite), 225 (dedicated)
38、300 839 2 300 (composite) Maximum power spectral density (dB(W/Hz) 57.5 58.6 61 40.9 57.1Maximum e.i.r.p. density (dB(W/Hz) 23.2 13.8 20.8 8.6 10.7 Receiving earth station Location Russian Federation United States of America Europe Japan China Antenna size (m) 13.1 18.3 3, 9 5, 9.2 and 13 3, 12 and
39、15 Rx antenna gain (dBi) 61.3 65.5 54, 63.9 59.5, 67.7 53.4, 65.5 and 67.1 Rx antenna radiation pattern Rec. ITU-R S.580 RR Appendix 8, Annex III System noise temperature (K) 320 300 795 200 330 Link availability (%) 99.9 99.9 99.9 Interference criterion Rec. ITU-R SA.1155, Rec. ITU-R S.741 Rec. ITU
40、-R SA.1155 (1)The United States of America DRS transmits a dedicated and a composite link. Transmission rate for the dedicated link is 300 Mbit/s, for the composite link the transmission rate is on the order of 800 Mbit/s. (2)The European and Japanese networks employ a decentralized link concept tha
41、t permits independent return feeder links to different earth station. (3)The Russian Federation DRS transmits several independent return feeder links within the indicated frequency range with transmission rates 150 Mbits/s. (4)The Chinese networks implement a composite link concept that permits return feeder links to different earth stations. _
