CONTENTS

Policy on Intellectual Property Right (IPR)
 1     Introduction
 2     Technical and operational characteristics of NGSO SD satellites
 3     Relevant ITU-R Recommendations
 4     Assessment of spectrum requirements
 5     Suitability of existing allocations to the space operation service below 1 GHz for NGSO SD satellites
        5.1     Overview of existing allocations to the space operation service below 1 GHz
Allocations to the SOS below 1 GHz are shown in the Radio Regulations, Article 5, Section IV, Table of Frequency Allocations and associated footnotes.
                  5.1.1     Worldwide harmonized allocations to the space operation service
        5.2     Allocated bandwidth
                  5.2.1     Allocated bandwidth to the space operation service
                  5.2.2     Allocated bandwidth to other space services
        5.3     Applicability of RR No. 9.21
        5.4     Evaluation of the use of existing SOS and non-SOS allocations
 6     Technical characteristics of systems operating in services other than the space operation service in the 150.05-174 MHz and 400.15‑420 MHz frequency bands
        6.1     Current allocations in the range 150.05-174 MHz
                  6.1.1     Radiocommunication services operating in the 150.05-174 MHz frequency band
                  6.1.2     Technical characteristics of systems operating in the 150.05-174 MHz frequency band
                  6.1.3     The frequency bands used by Global Maritime Distress and Safety System in the 156-162 MHz frequency range
        6.2     Current allocations in the frequency band 400.15-420 MHz
                  6.2.1     Radiocommunication services operating in the frequency band 400.15-420 MHz
                  6.2.2     The frequency band 406-406.1 MHz
                  6.2.3     Technical characteristics of systems operating in the frequency band 400.15‑420 MHz
 7     COSPAS-SARSAT System
        7.1     Definition of analysis scenario
        7.2     Interference from Orbiting NGSO SD satellites
        7.3     Interference from Earth Stations of NGSO SD satellites
        7.4     COSPAS-SARSAT System Analysis Summary
 8     Study of potential upgrade of existing allocations to the space operation service and their impact
        8.1     Compatibility studies between NGSO SD satellites in the Space Operation Service (SOS) space-to-Earth direction and meteorological satellite (MetSat) Earth station receivers in the frequency band 400.15-401 MHz (Study 8.1)
                  8.1.1     Analysis scenario
                  8.1.2     SOS NGSO SD Satellite Technical Characteristics
                  8.1.3     Impact assessment of SOS NGSO SD satellite transmitters into MetSat ground receivers
                  8.1.4     Summary of Study 8.1
        8.2     Compatibility studies between SOS NGSO SD satellites and space research service (SRS) satellites in the frequency band 400.15-401 MHz (Study 8.2)
                  8.2.1     Technical Parameters
                  8.2.2     Impact assessment of SOS NGSO SD satellite transmitters into SRS Earth station receivers
                  8.2.3     Impact assessment of SRS satellite transmitters into SOS NGSO SD Earth station receivers
                  8.2.4     Summary of Study 8.2
 9     Study of potential new allocations to the space operation service and their impact
        9.1     Sharing studies of the command system for NGSO SD satellites with radar systems operating in the frequency band 154-156 MHz (Study 9.1)
                  9.1.1     Impact assessment of radar emissions into SOS NGSO SD satellite receivers
                  9.1.2     Impact assessment of SOS NGSO SD satellite transmitters to space surveillance radar receivers.
                  9.1.3     Summary of Study 9.1
        9.2     Sharing studies of SOS systems for NGSO SD satellites and GMDSS systems operating in the frequency band 156-162 MHz
        9.3     Sharing studies with land-mobile systems in the frequency band 150.05-174 MHz (Study 9.3)
                  9.3.1     NGSO SD satellite emissions (space-Earth) to land-mobile systems in the frequency band 150.05‑174 MHz
                  9.3.2     NGSO SD earth-station emissions (Earth-space) to land-mobile systems in 150.05‑174 MHz frequency band
                  9.3.3     Effect of emissions from land mobile systems into SOS NGSO SD satellite receivers
                  9.3.4     Land mobile systems into NGSO SD earth-station in 162-174 MHz frequency band
        9.4     Sharing studies with land-mobile systems in the frequency band 406.1-420 MHz (Study 9.4)
                  9.4.1     NGSO SD satellite emissions (s-E) into land-mobile systems in 406.1-420 MHz frequency band
                  9.4.2     NGSO SD earth-station emissions (E-s) into land-mobile systems in 406.1-420 MHz frequency band
                  9.4.3     Land mobile systems into NGSO SD satellite receiver in 406.1-420 MHz frequency band
                  9.4.4     Land mobile systems into NGSO SD earth station in 406.1-420 MHz frequency band
        9.5     Sharing studies with fixed systems in the frequency band 406.1-420 MHz
                  9.5.1     NGSO SD satellite emissions (s-E) into fixed systems in 406.1-420 MHz frequency band (Study 9.5)
                  9.5.2     NGSO SD earth station emissions (E-s) into fixed systems in the frequency band 406.1‑420 MHz
                  9.5.3     Fixed systems into NGSO SD earth station in 406.1-420 MHz frequency band
        9.6     Sharing studies for SOS NGSO SD satellites (E-s) into GSO MetSat DCS and NGSO EESS/MetSat DCS in the frequency band 401-402 MHz
                  9.6.1     Sharing studies of SOS NGSO SD satellites (E-s) into GSO MetSat DCS in the frequency band 401-402 MHz (Study 9.6.1)
                  9.6.2     Sharing studies between SOS NGSO SD (E-s) and NGSO EESS/MetSat DCS in the frequency band 401-402 MHz (Study 9.6.2)
                  9.6.3     Sharing studies between SOS NGSO SD (E-s) and NGSO EESS/MetSat DCS in the frequency band 401-402 MHz (Study 9.6.3)
       9.7      Compatibility studies between SOS NGSO SD satellites (s-E) and GSO MetSat DCS and NGSO EESS/MetSat DCS in the frequency band 401-402 MHz
                  9.7.1     Compatibility studies between SOS NGSO SD satellites (s-E) and GSO MetSat DCS spacecraft receiver (401-402 MHz) (Study 9.7.1)
                  9.7.2     Compatibility studies between SOS NGSO SD satellites (s-E) and NGSO EESS/MetSat spacecraft receiver (401-402 MHz) (Study 9.7.2)
        9.8     Sharing studies between SOS NGSO SD satellites (E-s) and GSO MetSat and NGSO EESS/MetSat in the frequency band 402-403 MHz (Study 9.8)
                  9.8.1     Co-channel interference studies
                  9.8.2     Adjacent-channel interference study from NGSO SD Earth stations operating in the 403–404 frequency band
                  9.8.4     Summary of Study 9.8
        9.9     Sharing studies between SOS NGSO SD satellites (s-E) and GSO MetSat and NGSO EESS/MetSat in the frequency band 402-403 MHz (Study 9.9)
                  9.9.1     Co-channel interference studies
                  9.9.2     Adjacent-channel interference study from potential NGSO SD space stations operating in the 403–404 frequency band
                  9.9.3     Interference levels in specific bands
                  9.9.4     Summary of Study 9.9
       9.10     Sharing studies of the TT&C system for NGSO SD satellite with Space-to-Space Communication System (SSCS) onboard International Space Station (ISS) with frequencies 414.2 MHz (primary) and 417.1 MHz (backup) – (Study 9.10)
                  9.10.1     Introduction
                  9.10.2     Relevant ITU-R Regulations and Recommendations
                  9.10.3     Scenario system characteristics
                  9.10.4     Impact assessment of scenarios (1-8)
                  9.10.5     Summary of Study 9.10
       9.11     Sharing Studies between NGSO SD satellites and the Radio Astronomy Service (RAS) in the 150.04-153 MHz and 406.1-410 MHz Frequency Bands (Study 9.11)
                  9.11.1     Sharing studies between NGSO SD (space-to-Earth direction) and RAS stations
                  9.11.2     Sharing studies for the NGSO SD Earth-to-space direction
                  9.11.3     Compatibility studies for out-of-band emissions in the space-to-Earth direction
                  9.11.4     Compatibility studies for out-of-band emissions in the Earth-to-space direction
                  9.11.5     Summary of Study 9.11
       9.12     Compatibility studies of NGSO SD satellite systems with radiosonde systems operating in 400.15 to 406 MHz (Study 9.12)
                  9.12.1     Compatibility studies between NGSO SD satellite (s-E) downlink into Radiosondes (Type B) ground station receiver using Recommendations ITU-R RS.1165-2 and RS.1263-1 for co-channel operation in the 400.15 to 406 MHz frequency band (Study 9.12.1)
                  9.12.2      Compatibility between Radiosonde and NGSO SD Satellite Operations operating in the 400.15 to 406 MHz frequency band using DR Rec. ITU-R RS.1165-2 and DR Rec. ITU-R RS.1263-1 (Study 9.12.2)
                  9.12.3     Compatibility between dropsondes and NGSO SD satellite operating in the 400.15 to 406 MHz frequency band using parameters from DR Rec. ITU-R RS.1165-2 and DR Rec. ITU-R RS.1263-1 (Study 9.12.3)
                  9.12.4     Compatibility between Rocketsondes and NGSO SD Satellite operating in the frequency band 400.15 to 406 MHz using parameters from DR Rec. ITU-R RS.1165-2 and DR Rec. ITU-R RS.1263-1 (Study 9.12.4)
                  9.12.5     Compatibility between MetAids ground station receiver and NGSO SD satellite downlink (s-E) operating in the 400.15 to 406 MHz frequency band using parameters from DR Rec. ITU-R RS.1165-2 and DR Rec. ITU-R RS.1263-1 Analysis (Study 9.12.5)
                  9.12.6     Compatibility/Sharing between MetAids operations and NGSO SD satellite operating in the 400.15 to 406 MHz frequency band using parameters from DR Rec. ITU-R RS.1165-2 and DR Rec. ITU-R RS.1263-1 - Analysis (Study 9.12.6)
                  9.12.7     Radiosonde transmitter interference and compatibility analysis – Radiosonde transmitter interference into NGSO SD satellite uplink receiver (E-s). (Study 9.12.7)
                  9.12.8     Compatibility between MetAids Operations and NGSO SD Satellites operating in the 400.15 to 406 MHz frequency band using NGSO SD Satellite Downlink (s-E) to MetAids Ground Station Receiver Operations: Adjacent Band Considerations – NGSO SD Satellite Downlink (s-E) Out of Band Emission Analysis. (Study 9.12.8)
       9.13     Study of radiosonde systems in the UK, operating in the frequency band 403 to 406 MHz (Study 9.13)
                  9.13.1     Introduction to study
                  9.13.2     Characteristics, operation and protection criteria for Digital System B in DR Rec. ITU‑R RS.1165
Protection criteria
Technical characteristics
                  9.13.3     Simulation results
                  9.13.4     Summary of Study 9.13 – Conclusions on MetAid radiosonde ground based receivers compatibility with NGSO SD Earth stations
       9.14     Compatibility analysis between the SOS NGSO SD Earth station (E-s) and MetAids (radiosondes) in the band 403-406 MHz (Study 9.14)
                  9.14.1     Introduction
                  9.14.2     Sharing analysis in the direction of SOS NGSO earth station (Earth-space) impacting radiosonde ground station receivers.
                  9.14.3     Sharing analysis in the direction radiosonde transmitter into SOS NGSO SD satellite receiver
                  9.14.5     Summary of Study 9.14
       9.15     Sharing studies between SOS NGSO SD earth stations and radiosondes receiving ground stations and between radiosondes and SOS NGSO SD satellite receivers in the band 403-406 MHz (Study 9.15)
                  9.15.1     Introduction
                  9.15.2     Mitigation techniques to protect receiving stations in the Meteorological-aids service
                  9.15.3     Sharing analysis
       9.16     Compatibility Study between potential allocation of SOS in band 403-406 MHz and Radiosonde Receiver (Study 9.16)
                  9.16.1     Introduction
                  9.16.2     TVG Methodology
                  9.16.3     Radiosonde characteristics
                  9.16.4     Space Operation Service SOS characteristics
                  9.16.5     Simulation
                  9.16.6     Conclusion
       9.17     Compatibility study between SOS (Earth-to-space) in band 403-406 MHz and dropsonde systems (Study 9.17)
                  9.17.1     Introduction
                  9.17.2     Sharing analysis in the direction SOS earth station to dropsondes receiver
                               9.17.2.5     Adjacent band consideration
                  9.17.3     Conclusion
10     Summary
Annex A  Frequency allocations to other space services below 1 GHz
        A.1     Introduction
        A.2     Meteorological Satellite Service Allocations
        A.3     Space Research Service (SRS) Allocations
        A.4     Earth Exploration Satellite Service (EESS) Allocations
        A.5     Radionavigation Satellite Service (RNSS) Allocations
        A.6     Amateur Satellite Service Allocations
        A.7     Standard Frequency and Time Signal – Satellite Service
        A.8     Mobile Satellite Service (MSS) Allocations
        A.9     Maritime Mobile Satellite Service (MMSS) Allocations
       A.10     Summary