1、 Recommendation ITU-R M.1787-2(09/2014)Description of systems and networks in the radionavigation-satellite service (space-to-Earth and space-to-space) and technical characteristics oftransmitting space stations operating in the bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHzM SeriesMobil
2、e, radiodetermination, amateurand related satellite servicesii Rec. ITU-R M.1787-2 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, a
3、nd 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 Conferences and Radiocommunication Assemblies supported by Study Groups
4、. 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 statements and licensing declarations by patent holders are available from htt
5、p:/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 available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satel
6、lite 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 satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing
7、 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 and frequency standards emissions V Vocabulary and related subjects Not
8、e: 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 means whatsoever, without written permission of ITU. Rec. ITU-R M.1787-2 1
9、RECOMMENDATION ITU-R M.1787-2 Description of systems and networks in the radionavigation-satellite service (space-to-Earth and space-to-space) and technical characteristics of transmitting space stations operating in the bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz (Questions ITU-R 217
10、-2/4 and ITU-R 288/4) (2009-2012-2014) Scope The information on orbital parameters, navigation signals and technical characteristics of systems and networks in the radionavigation-satellite service (RNSS) (space-to-Earth, space-to-space) operating in the bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1
11、559-1 610 MHz are presented in this Recommendation. This information is intended for use in the assessment of the interference impact between systems and networks in the RNSS and with other services and systems. Keywords RNSS, orbital parameters, navigation signals, technical characteristics. Abbrev
12、iations/Glossary ABAS Aircraft-Based Augmentation System CS Commercial Service ECEF Earth-centred, Earth-fixed GBAS Ground-Based Augmentation System GMS ground monitoring station GTRF Galileo Terrestrial Reference Frame GUS ground uplink station HA high accuracy ITRS International Terrestrial Refere
13、nce Frame MCS Master Control Station MRS monitor and ranging station NCS network communication subsystem OS Open Service PNT positioning, navigation and timing PRN pseudo-random noise PRS Public Regulated Service PSD power spectral density SA standard accuracy SBAS Satellite-Based Augmentation Syste
14、m SiS signal-in-space 2 Rec. ITU-R M.1787-2 SPS Standard Positioning Service WAAS Wide Area Augmentation System Related ITU Recommendations, Reports Recommendation ITU-R M.1318-1 Evaluation model for continuous interference from radio sources other than in the radionavigation-satellite service to th
15、e radionavigation-satellite service systems and networks operating in the 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz and 5 010-5 030 MHz bands Recommendation ITU-R M.1831-0 A coordination methodology for RNSS inter-system interference estimation Recommendation ITU-R M.1901-1 Guidance on ITU-R
16、 Recommendations related to systems and networks in the radionavigation-satellite service operating in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz, 5 000-5 010 MHz and 5 010-5 030 MHz Recommendation ITU-R M.1902-0 Characteristics and protection criteria for receiving earth
17、stations in the radionavigation-satellite service (space-to-Earth) operating in the band 1 215-1 300 MHz Recommendation ITU-R M.1903-0 Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) and receivers in the aeronautical radi
18、onavigation service operating in the band 1 559-1 610 MHz Recommendation ITU-R M.1904-0 Characteristics, performance requirements and protection criteria for receiving stations of the radionavigation-satellite service (space-to-space) operating in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz
19、 and 1 559-1 610 MHz Recommendation ITU-R M.1905-0 Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) operating in the band 1 164-1 215 MHz Recommendation ITU-R M.2030-0 Evaluation method for pulsed interference from relevan
20、t radio sources other than in the radionavigation-satellite service to the radionavigation-satellite service systems and networks operating in the 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz frequency bands Report ITU-R M.766-2 Feasibility of frequency sharing between the GPS and other serv
21、ices The ITU Radiocommunication Assembly, considering a) that systems and networks in the radionavigation-satellite service (RNSS) provide worldwide accurate information for many positioning, navigation and timing applications, including safety aspects for some frequency bands and under certain circ
22、umstances and applications; b) that there are several operating and planned systems and networks in the RNSS; c) that any properly equipped earth station may receive navigation information from systems and networks in the RNSS on a worldwide basis, recognizing a) that the bands 1 164-1 215 MHz, 1 21
23、5-1 300 MHz, and 1 559-1 610 MHz are allocated on a primary basis to RNSS (space-to-Earth, space-to-space); b) that the bands 1 164-1 215 MHz, 1 215-1 300 MHz, and 1 559-1 610 MHz are also allocated on a primary basis to other services; c) that use of the RNSS in the band 1 215-1 300 MHz is subject
24、to RR No. 5.329; d) that under RR No. 5.328B systems and networks in the RNSS intending to use the bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz and 5 010-5 030 MHz for which complete Rec. ITU-R M.1787-2 3 coordination or notification information, as appropriate, is received by the Radioco
25、mmunication Bureau after 1 January 2005 are subject to the application of the provisions of Nos. 9.12, 9.12A and 9.13; e) that under RR No. 9.7, stations in satellite networks in the RNSS using the GSO are subject to coordination with other such satellite networks; f) that Recommendations ITU-R M.19
26、05, ITU-R M.1902, ITU-R M.1903, and ITU-R M.1904 provide technical and operational characteristics of, and protection criteria for, receiving stations in the RNSS (space-to-Earth and space-to-space) operating in the bands 1 164-1 215 MHz, 1 215-1 300 MHz, and 1 559-1 610 MHz; g) that Recommendation
27、ITU-R M.1318 provides an evaluation model for continuous interference from radio sources other than in the RNSS to the RNSS systems and networks operating in the 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz and 5 010-5 030 MHz bands; h) that Recommendation ITU-R M.2030 provides an evaluation me
28、thod for pulsed interference from relevant radio sources other than in the RNSS to the RNSS systems and networks operating in the 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz bands; i) that Recommendation ITU-R M.1901 provides guidance on this and other ITU-R Recommendations related to syste
29、ms and networks in the RNSS operating in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz, 5 000-5 010 MHz and 5 010-5 030 MHz; j) that Report ITU-R M.766 contains information that is relevant to RNSS operations in the band 1 215-1 300 MHz; k) that Recommendation ITU-R M.1831 pr
30、ovides a methodology for RNSS intersystem interference estimation to be used in coordination between systems and networks in the RNSS, recommends 1 that, in the bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz, the characteristics of transmitting space stations and system descriptions of A
31、nnexes 1 to 10 should be used: 1.1 in determination of methodology and criteria for mutual coordination of systems and networks in the RNSS; 1.2 in assessing the interference impact between systems and networks in the RNSS (space-to-Earth and space-to-space) and systems in other services, taking int
32、o account the status of RNSS with respect to these other services; 2 that the following NOTE should be considered as part of this Recommendation. NOTE In the annexes of this Recommendation, the term “Signal frequency range” refers to the frequency range of the RNSS signal of interest (for CDMA syste
33、ms: Carrier frequency Half the signal bandwidth (unless otherwise noted); for FDMA systems: Base frequency + (Channel number * Channel spacing) Half the signal bandwidth). Channel number range should also be given for FDMA systems. The signal frequency range is expressed in MHz. 4 Rec. ITU-R M.1787-
34、2 Annex 1 Technical description of system and characteristics of transmitting space stations of the GLONASS global navigation satellite system TABLE OF CONTENTS Page 1 Introduction 4 1.1 Frequency requirements 4 2 System overview 5 3 System description 6 3.1 Space segment 6 3.2 Control segment 6 3.3
35、 User segment 6 4 Navigation signal structure . 6 5 Signal power and spectra 6 1 Introduction The GLONASS system consists of 24 satellites equally spaced in three orbital planes with eight satellites in each plane. The orbit inclination angle is 64.8. Each satellite transmits navigation signals in t
36、hree frequency bands: L1 (1.6 GHz), L2 (1.2 GHz) and L3 (1.1 GHz). The satellites are differentiated by carrier frequency; the same carrier frequency may be used by antipodal satellites located in the same plane. Navigation signals are modulated with a continuous bit stream (which contains informati
37、on about the satellite ephemeris and time), and also a pseudo-random code for pseudo-range measurements. A user receiving signals from four or more satellites is able to determine the three location coordinates and the three velocity vector constituents with high accuracy. Navigational determination
38、s are possible when on or near the Earths surface. 1.1 Frequency requirements The frequency requirements for the GLONASS system were based upon ionosphere transparency, radio link budget, simplicity of user antennas, multipath suppression, equipment cost and Radio Regulations (RR) provisions. The ca
39、rrier frequencies vary by an integer multiple of 0.5625 MHz in the L1 band, by 0.4375 MHz in the L2 band and by 0.423 MHz in the L3 band. Since 2006 new satellites in the GLONASS system use 14 to 20 carrier frequencies in different bands. In the L1 band carrier frequencies 1 598.0625 MHz (lowest) to
40、 1 605.3750 MHz (highest) Rec. ITU-R M.1787-2 5 are used, in the L2 band carrier frequencies from 1 242.9375 MHz (lowest) to 1 248.6250 MHz (highest) are used and in the L3 band carrier frequencies from 1201.7430 MHz (lowest) to 1209.7800 MHz (highest) are used. Nominal values of carrier frequencies
41、 of radionavigation signals used in the GLONASS system are given in Table 1-1. TABLE 1-1 Nominal values of carrier frequencies of radionavigation signals in the GLONASS system K (No. of carrier frequency) FKL1(MHz) FKL2(MHz) FKL3(MHz) 12 1 209.780011 209.357010 1 208.9340 09 208.511008 1 208.088007
42、207.6650 06 1 605.3750 1 248.6250 1 207.2420 05 1 604.8125 1 248.1875 1 206.8190 04 1 604.2500 1 247.7500 1 206.3960 03 1 603.6875 1 247.3125 1 205.9730 02 1 603.1250 1 246.8750 1 205.5500 01 1 602.5625 1 246.4375 1 205.1270 00 1 602.0000 1 246.0000 1 204.7040 01 1 601.4375 1 245.5625 1 204.2810 02
43、1 600.8750 1 245.1250 1 203.8580 03 1 600.3125 1 244.6875 1 203.4350 04 1 599.7500 1 244.2500 1 203.0120 05 1 599.1875 1 243.8125 1 202.5890 06 1 598.6250 1 243.3750 1 202.1660 07 1 598.0625 1 242.9375 1 201.7430 Two phase-shift keying (by 180 of the phase) navigation signals shifted in phase by 90
44、(in quadrature) are transmitted at each carrier frequency. They are a standard accuracy (SA) signal and a high accuracy (HA) one. 2 System overview The GLONASS system provides navigation data and accurate time signals for terrestrial, maritime, air and space users. The system operates on the princip
45、le of passive trilateration. The GLONASS system user equipment measures the pseudo-ranges and radial pseudo-velocities from all visible satellites and receives information about the satellites ephemeris and clock parameters. On the basis of these data, the three coordinates of the users location and
46、 the three velocity vector constituents are calculated and user clock and frequency correction is made. Coordinate system PE-90 is used by GLONASS system. 6 Rec. ITU-R M.1787-2 3 System description The GLONASS system consists of three major segments: the space segment, the control segment and the us
47、er segment. 3.1 Space segment The GLONASS system is comprised of 24 satellites located in three orbital planes with eight satellites in each plane. The planes are separated from each other by 120 longitude. The orbit inclination angle is 64.8. The satellites are equally spaced by 45 in a plane by ar
48、gument of latitude. Their rotation period is 11 h 15 min. The height of the orbit is 19 100 km. 3.2 Control segment The control segment consists of the system control centre and a monitoring station network. The monitoring stations measure the satellites orbital parameters and clock shift relative t
49、o the main system clock. These data are transmitted to the system control centre. The centre calculates the ephemerides and clock correction parameters and then uploads messages to the satellites through the monitor stations on a daily basis. 3.3 User segment The user segment consists of a great number of user terminals of different types. The user terminal consists of an antenna, a receiver, a processor and an input/output device. This equipment may be combined with other navigation devices to increase navigation accuracy and
