1、 Recommendation ITU-R S.1503-3 (01/2018) Functional description to be used in developing software tools for determining conformity of non-geostationary-satellite orbit fixed-satellite service systems or networks with limits contained in Article 22 of the Radio Regulations S Series Fixed-satellite se
2、rvice ii Rec. ITU-R S.1503-3 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, and carry out studies without limit of frequency range
3、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. Policy on Intellectual Property Right (IPR) ITU-R po
4、licy 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 http:/www.itu.int/ITU-R/go/patents/en where the Guideline
5、s 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 Satellite delivery BR Recording for production, archival an
6、d 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 systems S Fixed-satellite service SA Space applicatio
7、ns 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 Note: This ITU-R Recommendation was approved in English u
8、nder the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2018 ITU 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R S.1503-3 1 RECOMMENDATION ITU-R S.1503-3 Functional description t
9、o be used in developing software tools for determining conformity of non-geostationary-satellite orbit fixed-satellite service systems or networks with limits contained in Article 22 of the Radio Regulations (2000-2005-2013-2018) Scope This Recommendation provides a functional description of the sof
10、tware for use by the Radiocommunication Bureau of ITU to conduct examination of non-GSO FSS system notifications for their compliance with the validation limits specified in the Radio Regulations. Keywords epfd; non-GSO; methodology Abbreviations/Glossary Alpha angle (): the minimum angle at the GSO
11、 earth station between the line to the non-GSO satellite and the lines to the GSO arc. e.i.r.p. mask: equivalent isotropic radiated power mask used to define the emissions of the non-GSO earth station in the epfd(up) calculation or the emissions of the non-GSO satellite for the epfd(IS) calculation.
12、 epfd: equivalent power flux-density, as defined in RR No. 22.5C.1, of which there are three cases to consider: epfd(down): emissions from the non-GSO satellite system into a GSO satellite earth station; epfd(up): emissions from the non-GSO earth station into a GSO satellite; epfd(IS): inter-satelli
13、te emissions from the non-GSO satellite system into a GSO satellite system. pfd mask: power flux-density mask used to define the emissions of the non-GSO satellite in the epfd(down) calculation. X angle (X): the minimum angle at the non-GSO satellite between the line from the GSO earth station and t
14、he lines to the GSO arc. WCG: Worst Case Geometry, the location of the GSO earth station and GSO satellite that analysis suggests would cause the highest single entry epfd values for given inputs. Related ITU Recommendations, Reports Recommendation ITU-R BO.1443-3 Reference BSS earth station antenna
15、 patterns for use in interference assessment involving non-GSO satellites in frequency bands covered by RR Appendix 30 Recommendation ITU-R S.672-4 Satellite antenna radiation pattern for use as a design objective in the fixed-satellite service employing geostationary satellites Recommendation ITU-R
16、 S.1428-1 Reference FSS earth-station radiation patterns for use in interference assessment involving non-GSO satellites in frequency bands between 10.7 GHz and 30 GHz 2 Rec. ITU-R S.1503-3 The ITU Radiocommunication Assembly, considering a) that WRC-2000 adopted, in Article 22 of the Radio Regulati
17、ons (RR), single-entry limits applicable to non-geostationary satellite orbit (non-GSO) fixed-satellite service (FSS) systems in certain parts of the frequency range 10.7-30 GHz to protect geostationary satellite orbit (GSO) networks operating in the same frequency bands from unacceptable interferen
18、ce; b) that these frequency bands are currently used or planned to be used extensively by geostationary-satellite orbit systems (GSO systems); c) that during the examination under Nos. 9.35 and 11.31, the Bureau examines non-GSO FSS systems to ensure their compliance with the single-entry epfd limit
19、s given in Tables 22-1A, 22-1B, 22-1C, 22-1D, 22-1E, 22-2 and 22-3 of Article 22 of the RR; d) that to perform the regulatory examination referred to in considering c), the Radiocommunication Bureau (BR) requires a software tool that permits the calculation of the power levels produced by such syste
20、ms, on the basis of the specific characteristics of each non-GSO FSS system submitted to the Bureau for coordination or notification, as appropriate; e) that GSO FSS and GSO broadcasting-satellite service (BSS) systems have individual characteristics and that interference assessments will be require
21、d for multiple combinations of antenna characteristics, interference levels and probabilities; f) that designers of satellite networks (non-GSO FSS, GSO FSS and GSO BSS) require knowledge of the basis on which the BR will make such checks; g) that such tools may be already developed or under develop
22、ment and may be offered to the BR, recommends that the functional description specified in Annex 1 should be used to develop software tools calculating the power levels produced by non-GSO FSS systems and the compliance of these levels with the limits contained in Tables 22-1A, 22-1B, 22-1C, 22-1D,
23、22-1E, 22-2 and 22-3 of Article 22 of the RR. Rec. ITU-R S.1503-3 3 Annex 1 Functional description of software for use by the BR in checking compliance of non-GSO FSS systems with epfd limits TABLE OF CONTENTS Page PART A Fundamental constraints and basic assumptions 3 PART B Input parameters . 9 PA
24、RT C Generation of pfd/e.i.r.p. masks . 24 PART D Software for the examination of non-GSO filings . 43 PART E Testing of the reliability of the software outputs . 131 PART F Software implementing this Recommendation. 132 PART A Fundamental constraints and basic assumptions A1 General A1.1 Purpose Th
25、e software algorithm described in this Annex is designed for its application by the BR to conduct examination of the non-GSO FSS system notifications for their compliance with the limits contained in Tables 22-1A, 22-1B, 22-1C, 22-1D, 22-1E, 22-2 and 22-3 of Article 22 of the RR. The algorithm could
26、 also under certain conditions permit examination of whether coordination is required between non-GSO FSS systems and large earth stations under Articles 9.7A and 9.7B using the criteria in RR Appendix 5. The algorithm in this Recommendation was developed based upon a reference GSO satellite in equa
27、torial orbit with zero inclination angle. The analysis to determine whether a non-GSO satellite system meets the epfd limits in Article 22 of the RR is made by calculating the epfd levels at this reference satellite or at an earth station pointing towards it. A GSO satellite system operating at othe
28、r inclination angles could be predicted to receive higher epfd levels without the non-GSO satellite system being considered in breach of the Article 22 limits. Analysis under RR Nos. 9.7A and 9.7B, however, is to determine if coordination is required by comparing against the trigger level in Appendi
29、x 5 of the RR, and therefore in this case other methodologies, including those that assume non-zero GSO satellite inclination, could be acceptable alternatives. 4 Rec. ITU-R S.1503-3 A1.2 Software block-diagram The block-diagram of the software algorithm described in this Annex is shown in Fig. 1. I
30、t comprises initial data and calculation for the notifying administration and the BR. The data section contains the whole set of parameters relevant to the notified non-GSO system, a set of reference GSO system parameters as well as epfd limits provided by the BR. The calculation section is designed
31、 for estimations required to examine notified non-GSO systems compliance with the epfd limits. The calculation section is based on a concept of a downlink power flux-density (pfd) mask (see Note 1), an uplink effective isotropic radiated power (e.i.r.p.) mask (see Note 2) and inter-satellite e.i.r.p
32、. mask (see Note 3). NOTE 1 A pfd mask is a maximum pfd produced by a non-GSO space station and is defined in Part C. NOTE 2 An e.i.r.p. mask is a maximum e.i.r.p. radiated by a non-GSO earth station and is a function of latitude and the angle from the boresight of the transmitting antenna main beam
33、 to a point on the GSO arc. NOTE 3 An inter-satellite e.i.r.p. mask is a maximum e.i.r.p. radiated by a non-GSO space station and is a function of latitude and the angle between the line to the sub-satellite point and a point on the GSO arc. The pfd/e.i.r.p. masks are calculated by the filing admini
34、stration as identified in Block 1 and then supplied with the other non-GSO system parameters in Blocks a and b. The BR supplies additional parameters, in particular the epfd limits in Block c. Rec. ITU-R S.1503-3 5 FIGURE 1 Stages in epfd verification key logic blocks S. 11 5 0 3 - 0I nput da t a t
35、o E P F D c a l c ul a t i onM a s k ge ne r a t i onE P F D c a l c ul a t i ons unde r t a ke n by B R a nd s of t w a r e t oolP a r a m e t e r s of non- G S O s ys t e m de l i ve r e dby a not i f yi ng a dm i ni s t r a t i onIn i t i al d at a av ai l ab l e at t h e BRB R D a t a i nput t o
36、 E P F D c a l c ul a t i onsN on- G S O S ys t e m pa r a m e t e r s i nputt o E P F D c a l c ul a t i onsC a l c ul a t i on of pf d / e .i .r .p. m a s kspf d / e .i .r .p. m a s ksB l o c k cB l o c k bB l o c k aB l o c k 1B l o c k 2D e t e r m i na t i on of r uns t o e xe c ut eD e t e r m
37、 i na t i on of w or s t c a s ege om e t r yC a l c ul a t i on of E P F D s t a t i s t i c s a ndl i m i t c om pl i a nc e c he c ki ngD e c i s i on: pa s s / f a i lB l o c k 3B l o c k 4U nde r t a ke n by t he f i l i ng a dm i ni s t r a t i onA1.3 Allocation of responsibilities between Adm
38、inistrations and the BR for software employment Taking into account significant complexity regarding specific features of different non-GSO system configurations in the software it would seem appropriate to impose some burden of responsibility relevant to testing for epfd limits on administrations n
39、otifying appropriate non-GSO systems. Therefore the examination procedure for meeting epfd limits would consist of two stages. The first stage would include derivation of a mask for pfd/e.i.r.p. produced by interfering non-GSO network stations. The mask would account for all the features of specific
40、 non-GSO systems arrangements (such as possible beam pointing and transmit powers). The first stage would be finalized by the delivery of the pfd/e.i.r.p. mask to the BR. 6 Rec. ITU-R S.1503-3 The second stage calculations would be effected at the BR. The second stage would feature the following ope
41、rations: Identification of the runs required for a non-GSO network taking into account the frequencies for which it has filed and the frequency ranges for which there are epfd limits in Article 22 (Block 2). Definition of the maximum epfd geometry of a GSO space station and an earth station of that
42、network (Block 3). It would ensure verification of sharing feasibility for a notified non-GSO network with any GSO network in the FSS and BSS. epfd statistics estimation (Block 4). Making a decision on interference compliance with appropriate epfd limits. The estimations are based on the non-GSO sys
43、tem parameters (Blocks a and b) delivered by a notifying administration and the initial data (Block c) available at the BR. Any administration may use software that uses the algorithms defined in this Annex together with data on the non-GSO networks to estimate statistics for interference into its o
44、wn GSO networks and check for compliance with epfd limits. It would assist in solving probable disputes between the BR and administrations concerned. The elements of the software block-diagram discussed are presented hereinafter in detail. The Parts are as follows: Part A Basic limitations and main
45、system requirements for the software as a whole are presented. Part B Non-GSO networks parameters and initial data for Blocks a and b are discussed. Part C Definitions and estimation algorithms for pfd/e.i.r.p. masks relative to non-GSO network earth and space stations are presented. Specifics of th
46、ose masks applying in simulation is also discussed (Block 1). Part D The part deals with general requirements on the software related to examination of non-GSO networks notifications, algorithms to estimate epfd statistics, and the format for output data presentation. Part D covers issues of Blocks
47、2, 3 and 4. Parts E, F These parts define requirements on the software related to valuation of delivered software and to verification of the software output on validity. A2 Fundamental assumptions A2.1 Units of measurement To provide for adequate simulation results and to avoid errors a common measu
48、rement units system is used in Table 1 for the software description. The list of measurement units for the basic physical parameters is shown in Table 1. Rec. ITU-R S.1503-3 7 TABLE 1 The system of measurement units for basic physical parameters used for the software performance description Paramete
49、r Units Distance km Angle degrees Time s Linear rotation velocity km/s Angular rotation velocity degrees/s Frequency MHz Frequency bandwidth kHz Power dBW Power spectral density dB(W/Hz) pfd dB(W/(m2 BWref) Average number of co-frequency non-GSO earth stations per unit area 1/km2 epfd, epfd or epfdis dB(W/BWref) Antenna gain dBi Geographical position on the Earths surface degrees A2.2 Constants The functional description of the software for examination of non-GSO networks notification at the BR uses the constants shown in Table 2. TABLE 2 Consta
