ITU-R REPORT RS 2185-2010 Study on compatibility between arrival time difference (ATD) stations of the meteorological aids service and stations of the radionavigation service in th.pdf
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1、 Report ITU-R RS.2185(10/2010)Study on compatibility between “arrival time difference” (ATD) stations of the meteorological aids service and stationsof the radionavigation service in the frequency band 9 to 14 kHzRS SeriesRemote sensing systemsii Rep. ITU-R RS.2185 Foreword The role of the Radiocomm
2、unication 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 regulato
3、ry and 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/
4、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 http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-
5、R/ISO/IEC and the ITU-R patent information database can also be found. Series of ITU-R Reports (Also available online at http:/www.itu.int/publ/R-REP/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broa
6、dcasting 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 fixed-
7、satellite and fixed service systems SM Spectrum management Note: This ITU-R Report was approved in English by the Study Group under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2011 ITU 2011 All rights reserved. No part of this publication may be reproduced, by any me
8、ans whatsoever, without written permission of ITU. Rep. ITU-R RS.2185 1 REPORT ITU-R RS.2185 Study on compatibility between “arrival time difference” (ATD) stations of the meteorological aids service and stations of the radionavigation service in the frequency band 9 to 14 kHz (2010) TABLE OF CONTEN
9、TS Page 1 Executive summary 2 2 ATD and radionavigation station deployments at June 2010 . 2 3 Geographical separation between stations 4 4 Typical radionavigation station parameters 4 4.1 RNAV transmitter characteristics . 4 4.2 RNAV antenna efficiency . 5 5 Typical ATD station parameters . 5 6 Con
10、siderations of atmospheric noise 6 7 Interference mitigation . 7 8 ATD receiver sensitivity and maximum permissible interference . 8 9 VLF propagation modelling . 10 9.1 VLF dominate mode theory 10 9.1.1 Historical VLF measurements deriving typical attenuation rates for various VLF path profiles 10
11、9.1.2 Generalizing attenuation as a factor of frequency and ground conductivity 11 9.1.3 Sharing analysis using dominate mode theory by Wait 10 . 12 9.1.4 Dominate mode graphs of predictive field-strength levels 12 9.1.5 Dominate mode sharing analysis results 16 2 Rep. ITU-R RS.2185 Page 9.2 Propaga
12、tion of paths based on published research as a basis for compatibility between radionavigation services and ATD sensor stations . 16 9.2.1 United States of America towards the Mediterranean . 17 9.2.2 CCIR measurements and empirical modelling 18 9.2.3 Recommendation ITU-R P.684 19 9.2.4 Predictions
13、using Recommendations ITU-R P.368 and ITU-R P.684 combined with results of historical measurements 20 9.2.5 VLF measurements in the Pacific 22 9.2.6 Atlantic measurements by the Naval Ocean Systems Center 23 9.2.7 Results of sharing analysis using published VLF propagation data 24 9.2.8 Published VL
14、F propagation data sharing analysis results . 26 10 Conclusions on sharing between the radionavigation services and ATD sensors of the meteorological aids service 27 References 28 1 Executive summary This Report outlines the results of studies into the work seeking to define sharing criteria to mana
15、ge compatibility between transmitting stations of the radionavigation services and passive arrival time difference (ATD) receivers operating in the meteorological service in the frequency band below 20 kHz. It discusses various issues and aspects of VLF propagation and concludes on the sharing and r
16、egulatory management aspects of ATD sensors and radionavigation services within the frequency band under discussion. The findings, reflecting the real life sharing environment for many years, are that sharing between both services is a high possibility and practicality. Notwithstanding the technical
17、 aspects discussed herein, this is partially due to the nature of deployment characteristics of both services, and interference mitigation implemented by the arrival time difference system of the meteorological aids service. 2 ATD and radionavigation station deployments at June 2010 Figure 1 shows t
18、he location of each of the existing ATD receiver locations (shown in green) and known RNAV transmitter locations (shown in red). Rep. ITU-R RS.2185 3 FIGURE 1 ATD receiver and RNAV transmitter locations Actual ATD and RNAV site locations are shown in Tables 1 and 2. TABLE 1 ATD receiver site locatio
19、ns Site name Latitude (decimal) Longitude (decimal) Valentia 51.939719N 10.244534W Norderney 53.712421N 7.152314E Exeter 50.728043N 3.475605W Lerwick 60.139419N 1.185009W Akrotiri 34.587151N 32.989052E Gibraltar 36.152706N 5.348185W Keflavik 63.968330N 22.614094W Helsinki 60.203932N 24.961027E La Re
20、union 20.896791S 55.485258E Azores 38.658939N 27.223078W Payerne 46.812123N 6.943854E Camborne 50.218553N 5.327223W 4 Rep. ITU-R RS.2185 TABLE 2 Radionavigation site locations Site name Latitude (decimal) Longitude (decimal) Komsomolsk Na Amure 50.5667N 136.96667E Krasnodar 45.0333N 38.65E Novosibir
21、sk 55.0667N 82.9667E 3 Geographical separation between stations The physical separation distance between each ATD receiver and each of the RNAV transmitters is also shown in Table 3. TABLE 3 Separation distances between ATD and RNAV site locations Separation distance to RNAV site (km) ATD receiver s
22、ite Komsomolsk Na Amure Krasnodar Novosibirsk Valentia 8 216 3 616 5 707 Norderney 7 520 2 453 4 668 Exeter 8 156 3 613 5 445 Lerwick 7 154 3 106 4 705 Akrotiri 7 994 1 259 4 428 Gibraltar 9 701 3 798 6 699 Keflavik 7 164 4 263 5 343 Helsinki 6 289 1 917 3 388 La Reunion 11 222 7 535 8 850 Azores 9
23、985 5 357 7 685 Payerne 8 185 2 446 5 141 Camborne 8 262 3 300 5 581 4 Typical radionavigation station parameters The following section outlines various technical parameters of the radionavigation service. 4.1 RNAV transmitter characteristics The parameters in Table 4 were used as being representati
24、ve of a typical RNAV transmitter. Rep. ITU-R RS.2185 5 TABLE 4 Radionavigation stations parameters Name of transmitting station Occupied bandwidth (Hz) Transmitting centre frequency (kHz) Antenna input power (dBW) Komsomolsk Na Amure 100, 200 11.905, 12.500, 12.649, 13.281, 14.881, 15.625 57 Krasnod
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