CONTENTS

Recommendation ITU-R S.1503-4
Policy on Intellectual Property Right (IPR)
Annex 1  Functional description of software for use by the BR in checking  compliance of non-GSO FSS systems with epfd limits
PART A
A1 General
       A1.1 Purpose
       A1.2 Software block-diagram
       A1.3 Allocation of responsibilities between Administrations and the BR for software employment
A2 Fundamental assumptions
       A2.1 Units of measurement
       A2.2 Constants
       A2.3 The Earth model
       A2.4 Constellation types
A3 Modelling methodology
PART B
B1 Introduction
       B1.1 Background
       B1.2 Scope and overview
B2 BR supplied parameters to software
B3 Non-GSO system inputs to software
       B3.1 Non-GSO constellation parameters
       B3.2 Non-GSO space station parameters
       B3.3 Non-GSO system operating parameters
B4 pfd/e.i.r.p. masks
       B4.1 Non-GSO downlink pfd mask
       B4.2 Non-GSO uplink e.i.r.p. mask
       B4.3 Non-GSO inter-satellite e.i.r.p. mask
B5 Validation of input parameters
       B5.1 Non-GSO space station parameters
Test for circular or near-circular orbit:
Test HEO system has w = ±p/2:
       B5.2 Non-GSO system operating parameters ranges
       B5.3 Masks and system operating parameters XML files
Attachment  to Part B
PART C
C1 Definition
C2 Generation of satellite pfd masks
C2.1 General presentation
C2.2 Mitigation techniques description
C2.3 pfd calculation
C2.3.1 pfd calculation
C2.3.2 Satellite antenna gain at the point considered at the Earth’s surface
C2.4 Methodology
C2.4.1 Option 1
C2.4.2 Option 2
C3 Generation of e.i.r.p. masks
C3.1 Generation of earth station e.i.r.p. masks
C3.1.1 General presentation
C3.1.2 Mitigation techniques description
C3.1.3 Earth station antenna pattern
C3.1.4 Methodology
C3.2 Generation of space station e.i.r.p. masks
C4 pfd and e.i.r.p. mask format
C4.1 General structure of masks
C4.2 pfd mask for epfd(down)
C4.3 e.i.r.p. mask for epfd(up)
C4.4 e.i.r.p. mask for epfd(IS)
PART D
D1 Introduction
D1.1 Scope
D1.2 Background
D1.3 Overview
D1.4 General assumptions and limitations
D1.5 Database and interface
D2 Determination of runs to execute
D2.1 Article 22 runs
D2.2 Number 9.7A of the Radio Regulations
D2.3 Number 9.7B of the Radio Regulations
D3 Worst-case geometry
D3.1 WCG epfd↓
D3.1.1 Inputs
D3.1.2 Algorithm
D3.1.3 Geometry
D3.2 WCG epfd↑
D3.2.1 Inputs
D3.2.2 GSO system parameters
                  D3.2.3 Algorithm
       D3.3 WCG epfd_IS
                  D3.3.1 Inputs
                  D3.3.2 Algorithm
                  D3.3.3 Geometry
D4 Calculation of time step size and number of time steps
       D4.1 Simulation time increment and accuracy
       D4.2 Description of the procedure for the determination of minimum downlink simulation time increment
       D4.3 Description of the procedure for the determination of minimum uplink simulation time increment
       D4.4 Description of the procedure for the determination of minimum inter-satellite simulation time increment
       D4.5 Derivation of N_hit
       D4.6 Total simulation run time
                  D4.6.1 Repeating orbits
                  D4.6.2 Non-repeating orbits
       D4.7 Dual time step option
                  D4.7.1 Dual time step option epfd(down)
                  D4.7.2 Dual time step option epfd(up)
D5 epfd calculation description
       D5.1 epfd↓ software description
                  D5.1.1 Configuration parameters
                  D5.1.2 Non-GSO system parameters
                  D5.1.3 Run time step parameters
                  D5.1.4 Algorithms and calculation procedures
                  D5.1.5 pfd mask calculation
                  D5.1.6 Outputs
       D5.2 epfd↑ software description
                  D5.2.1 Configuration parameters
                  D5.2.2 Determination of maximum epfd configuration
                  D5.2.3 Calculation of run steps
                  D5.2.4 Inputs
                  D5.2.5 Production of non-GSO earth station distribution
                  D5.2.6 Algorithms and calculation procedures
                  D5.2.7 Calculation of e.i.r.p.
                  D5.2.8 Outputs
       D5.3 epfd_is software description
                  D5.3.1 Configuration parameters
D5.3.2 Determination of maximum epfd configuration
D5.3.3 Calculation of run steps
D5.3.4 Input parameters
D5.3.5 Algorithms and calculation procedures
D5.3.6 Outputs
D6 Geometry and algorithms
D6.1 Earth coordinates system
D6.2 GSO satellite coordinate system
D6.3 Non-GSO satellite coordinate system
D6.3.1 Non-GSO satellite orbit parameters
D6.3.2 Non-GSO satellite orbit predictor
Line of nodes
Orbit precession in ascending node longitude
Perigee argument precession
Use of precession terms
D6.3.3 Conversion to Generic Cartesian-based Vectors
D6.3.4 Non-GSO satellite orbit station keeping
D6.3.5 Forced orbit precession
D6.3.6 Combining the orbit models
D6.3.7 Mapping orbit parameters from SRS data
D6.4 Geometry
D6.4.1 Distance between two stations
D6.4.2 Distance to Earth horizon
D6.4.3 Satellite visibility check
D6.4.4 Angle to GSO arc and DLongitude
D6.4.5 Satellite and earth station azimuth and elevation
D6.5 Gain patterns
D6.5.1 GSO earth station gain patterns
D6.5.2 GSO satellite gain pattern
D7 Structure and format of results
D7.1 Go/No-go decision
D7.1.1 Overall description of the decision process
D7.1.2 Production of the CDF
D7.1.3 Comparison procedure
D7.1.4 Decision process
D7.2 Background information to decision
D7.3 Format for output
D7.3.1 Statement of the result of the compliance test
D7.3.2 Summary table
                  D7.3.3 Probability table
PART E
E1 Evaluation of the computation accuracy of the candidate software
E2 Evaluation of the epfd(↓/↑) statistics obtained by the BR
E3 Verification of the pfd masks
E4 Re-testing of the BR software after any modifications or upgrades
PART F
F1 Operating system
F2 Interfaces to existing software and databases
F3 User manual