Report of the CCIR (Geneva, 1982): Broadcasting Satellite Systems
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(ITU) ﻟﻼﺗﺼﺎﻻﺕ ﺍﻟﺪﻭﻟﻲ ﺍﻻﺗﺤﺎﺩ ﻓﻲ ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﺃﺟﺮﺍﻩ ﺍﻟﻀﻮﺋﻲ ﺑﺎﻟﻤﺴﺢ ﺗﺼﻮﻳﺮ ﻧﺘﺎﺝ (PDF) ﺍﻹﻟﻜﺘﺮﻭﻧﻴﺔ ﺍﻟﻨﺴﺨﺔ ﻫﺬﻩ .ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﻓﻲ ﺍﻟﻤﺘﻮﻓﺮﺓ ﺍﻟﻮﺛﺎﺋﻖ ﺿﻤﻦ ﺃﺻﻠﻴﺔ ﻭﺭﻗﻴﺔ ﻭﺛﻴﻘﺔ ﻣﻦ ﻧﻘﻼ ً◌ 此电子版(PDF版本)由国际电信联盟(ITU)图书馆和档案室利用存于该处的纸质文件扫描提供。 Настоящий электронный вариант (PDF) был подготовлен в библиотечно-архивной службе Международного союза электросвязи путем сканирования исходного документа в бумажной форме из библиотечно-архивной службы МСЭ. © International Telecommunication Union INTERNATIONAL TELECOMMUNICATION UNION CCIR INTERNATIONAL RADIO CONSULTATIVE COMMITTEE BROADCASTING-SATELLITE SYSTEMS Geneva, 1983 INTERNATIONAL TELECOMMUNICATION UNION CCIR INTERNATIONAL RADIO CONSULTATIVE COMMITTEE BROADCASTING-SATELLITE SYSTEMS Geneva, 1983 ISBN 92-61-01751-7 © I.T.U. TABLE OF CONTENTS Page INTRODUCTION BY THE CHAIRMAN .......................................................................................................................... 1 1. Background .......................................................................................................................................................................... 1 2. Some significant features of the report........................................................................................................................ 1 Resolution 70 (Annex) ................................................................................................................................................................. 2 CHAPTER 1 - BROADCASTING-SATELLITE SYSTEMS (TELEVISION AND SOUND) 3 1. Introduction ........................ 3 2. Features of a broadcasting-satellite service .............................................................................................................. 3 2.1 Rapid introduction of the service . ..................... 3 2.2 Potentially low cost of covering large areas .................................................................................. 3 2.3 Potentially more efficient use of frequency .............................................................................................................. 4 3. The pattern along which a broadcasting-satellite service may be planned ................................................. 4 3.1 L a n g u a g e s ............................................................................................................................................................................. 5 3.2 Number of alternative programmes ........................................................................................................................... 5 3.3 Size of a u d ie n c e ..................................! ............................................................................................................................. 5 3.4 Location of programme centres ..................................................................................................................................... 5 3.5 L in k a g e s . .................................................................................................................................................... 5 3.6 Hours of viewing ..................................................................................... 5 3.7 Differences in time zones .............................................................................. 6 4. Basic definitions in the broadcasting-satellite service ................................................................................ 6 4.1 Broadcasting-satellite space station ............................ 6 4.2 Broadcasting-satellite service ................................................ 6 4.3 Reception quality ....................................................... 6 4.3.1 Primary grade of reception quality................................................................................................................. 6 4.3.2 Secondary grade of reception quality ......................................................................................................... 6 4.4 Power flux-densities..................... 6 4.4.1 High power flux-density .................... 4.4.2 Medium power flux-density .............. 4.4.3 Low power flux-density ........................ 4.5 Definitions of service area and coverage area 4.5.1 Service a r e a ............................................... 4.5.2 Coverage area ......................................... 5. Orbits for broadcasting-satellite systems . 5.1 Factors affecting choice of o rb it ..................... 5.2 Coverage a r e a ....................................................................................................................................................................... 9 5.3 Coverage area, frequency and size of the satellite antenna ................................................................................ 9 5.4 Orbital spacing considerations ............................................................................................................................... 9 6 . Allocation of frequency bands ................... 9 6.1 Frequency bands for the broadcasting-satellite service ............................ 9 6.2 Frequency bands for the broadcasting-satellite service (sound) ........................................................... 12 6.3 Frequency bands for BSS feeder links ........................................ 14 7. Orbit and frequency planning ....................................................................................................................................... 14 7.1 I n tro d u c tio n ................................ 14 7.2 Planning approaches .......................................................................................................................................................... 15 7.2.1 Detailed orbital position and channel allotment plan ............................................................................ 16 7.2.2 Detailed orbital position and block frequency allotment plan ............................................................ 16 IV Page 7.2.3 Detailed frequency assignment and orbital arc allotment p la n ....................................................... 16 7.2.4 Guaranteed access by means of multilateral coordination ................................................................. 17 7.2.5 Coordination procedures and technical factors that are revised periodically ............................ 17 7.3 Planning of the 12 GHz band ....................................................................................................................... 17 7.4 Planning considerations for other bands in which the broadcasting-satellite service has an a llo c a tio n ............................................................................................................................................................................... 18 7.4.1 Introduction ......................................................................................................................................................... 18 7.4.2 2.6 GHz systems .................................................................................................................................................. 18 7.4.3 700 MHz systems .............................................................................................................................................. 18 8 . Picture quality ....................................................................................................................................................................... 19 8.1 G eneral c o n sid e ra tio n s...................................................................................................................................................... 19 8.2 Values of signal-to-noise ratio for various systems................................................................................................ 20 8.2.1 525-line system/NTSC (System M: USA and Canada) ........................................................................ 21 8.2.2 625-line system. Colour television signal (B, G, I and L system ) ................................................... 22 8.2.3 625-line system (System K ) ......................................................................................................................... 22 8.2.4 625-line system. Colour television signal (PAL system)........................................................................ 22 9. Influence of the atmosphere ............................................................................................................................................ 22 9.1 D ow n link (12 G H z r e g io n ) ............................................................................................................................................ 22 9.1.1 A tte n u a tio n .......................................................................................