ETSI TS 103 246-3 V1.3.1 (2020-10)

ETSI TS 103 246-3 V1.3.1 (2020-10)






TECHNICAL SPECIFICATION
Satellite Earth Stations and Systems (SES);
GNSS based location systems;
Part 3: Performance requirements

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2 ETSI TS 103 246-3 V1.3.1 (2020-10)



Reference
RTS/SES-00453
Keywords
GNSS, location, navigation, performance,
receiver, satellite, system
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3 ETSI TS 103 246-3 V1.3.1 (2020-10)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
Introduction . 7
1 Scope . 9
2 References . 9
2.1 Normative references . 9
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 13
3.3 Abbreviations . 14
4 Overview of GNSS based Location System Performance Features and Classes . 15
4.1 GNSS Based Location System (GBLS) . 15
4.2 Performance Features . 16
4.3 Class of Performance requirements . 17
4.4 Use cases associated to Performance Features . 18
5 Performance Requirements . 18
5.1 General . 18
5.2 Horizontal Position Accuracy. 19
5.2.1 Definition . 19
5.2.2 Metrics . 19
5.2.3 Performance requirements . 20
5.2.3.1 Use case: Moving Location Target . 20
5.2.3.1.1 Operational environment: Open area . 20
5.2.3.1.2 Operational environment: Urban area . 21
5.2.3.1.3 Operational environment: Asymmetric area . 21
5.2.3.2 Use case: Static Location Target . 21
5.2.3.2.1 Operational environment: Open area . 21
5.2.3.2.2 Operational environment: Urban area . 22
5.2.3.2.3 Operational environment: Asymmetric area . 22
5.3 Vertical Position Accuracy . 22
5.3.1 Definition . 22
5.3.2 Metrics . 22
5.3.3 Performance requirements . 22
5.3.3.1 Use case: Moving Location Target . 22
5.3.3.1.1 Operational environment: Open area . 22
5.3.3.1.2 Operational environment: Urban area . 23
5.3.3.1.3 Operational environment: Asymmetric area . 23
5.3.3.2 Use case: Static Location Target . 23
5.3.3.2.1 Operational environment: Open area . 23
5.3.3.2.2 Operational environment: Urban area . 23
5.3.3.2.3 Operational environment: Asymmetric area . 24
5.4 GNSS Time Accuracy . 24
5.4.1 Definition . 24
5.4.2 Performance requirements . 24
5.4.2.1 Use case: Moving Location Target . 24
5.4.2.1.1 Operational environment: Open area . 24
5.4.2.1.2 Operational environment: Urban area . 24
5.4.2.1.3 Operational environment: Asymmetric area . 25
5.4.2.2 Use case: Static Location Target . 25
5.4.2.2.1 Operational environment: Open area . 25
5.4.2.2.2 Operational environment: Urban area . 25
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4 ETSI TS 103 246-3 V1.3.1 (2020-10)
5.4.2.2.3 Operational environment: Asymmetric area . 25
5.5 Time-To-First-Fix (TTFF) . 26
5.5.1 Definition . 26
5.5.2 GBLS starting conditions . 26
5.5.3 Performance requirements . 27
5.5.3.1 Use case: Moving Location Target . 27
5.5.3.1.1 Operational environment: Open area . 27
5.5.3.1.2 Operational environment: Urban area . 27
5.5.3.1.3 Operational environment: Asymmetric area . 27
5.5.3.2 Use case: Static Location Target . 28
5.5.3.2.1 Operational environment: Open area . 28
5.5.3.2.2 Operational environment: Urban area . 28
5.5.3.2.3 Operational environment: Asymmetric area . 28
5.6 Position Authenticity . 29
5.6.1 Definition . 29
5.6.2 Metrics . 29
5.6.3 Performance requirements . 30
5.6.3.1 Specific conditions and interference threat scenarios . 30
5.6.3.2 Use case: Moving Location Target . 30
5.6.3.2.1 Operational environment: Open area . 30
5.6.3.2.2 Operational environment: Interference (Spoofing) Scenario . 30
5.6.3.3 Use case: Static Location Target . 30
5.6.3.3.1 Operational environment: Open area . 30
5.6.3.3.2 Operational environment: Interference (Spoofing) scenarios . 31
5.7 Robustness to Interference . 31
5.7.1 Definition . 31
5.7.2 Metrics . 31
5.7.3 Performances requirements . 32
5.7.3.1 Specific conditions and operational environment . 32
5.7.3.2 Use case 1: 20 MHz FM deviation . 32
5.7.3.3 Use case 2: 10 MHz FM deviation . 32
5.8 GNSS Se nsitivity . 33
5.8.1 Definition . 33
5.8.2 Metrics . 33
5.8.3 Performance requirements . 33
5.8.3.1 Operational scenario and specific masking conditions. 33
5.8.3.2 Use case 1: Open area and fine time assistance . 34
5.8.3.3 Use case 2: Asymmetric area and coarse time assistance . 34
5.9 Position Integrity (Protection Level) . 35
5.9.1 Definition . 35
5.9.2 Operational conditions . 35
5.9.3 Use case: Moving Location Target . 35
5.10 Position day-to-day repeatability in the Horizontal Plane . 36
5.10.1 Definition . 36
5.10.2 Metrics . 36
5.10.3 Performance requirements . 37
5.10.3.1 Use case: Moving Location Target . 37
5.10.3.1.1 Operational environment: Open area . 37
5.10.3.1.2 Operational environment: Urban area . 37
5.10.3.1.3 Operational environment: Asymmetric area . 37
5.10.3.2 Use case: Static Location Target . 38
5.10.3.2.1 Operational environment: Open area . 38
5.10.3.2.2 Operational environment: Urban area . 38
5.10.3.2.3 Operational environment: Asymmetric area . 38
5.11 Position day-to-day repeatability in the Vertical Plane . 38
5.11.1 Definition . 38
5.11.2 Metrics . 39
5.11.3 Performance requirements . 40
5.11.3.1 Use case: Moving Location Target . 40
5.11.3.1.1 Operational environment: Open area . 40
5.11.3.1.2 Operational environment: Urban area . 40
5.11.3.1.3 Operational environment: Asymmetric area . 40
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5 ETSI TS 103 246-3 V1.3.1 (2020-10)
5.11.3.2 Use case: Static Location Target . 40
5.11.3.2.1 Operational environment: Open area . 40
5.11.3.2.2 Operational environment: Urban area . 41
5.11.3.2.3 Operational environment: Asymmetric area . 41
5.12 Time-To-Fix Ambiguity (TTFA) . 41
5.12.1 Definition . 41
5.12.2 Metrics . 41
5.12.3 Performance requirements . 42
5.12.3.1 Use case: Moving Location Target . 42
5.12.3.1.1 Operational environment: Open area . 42
5.12.3.1.2 Operational environment: Urban area . 42
5.12.3.1.3 Operational environment: Asymmetric area . 42
5.12.3.2 Use case: Static Location Target . 43
5.12.3.2.1 Operational environment: Open area . 43
5.12.3.2.2 Operational environment: Urban area . 43
5.12.3.2.3 Operational environment: Asymmetric area . 43
Annex A (normative): Applicable Conditions and Scenarios. 44
A.1 General . 44
A.2 External Location Systems Parameters . 44
A.2.1 GNSS system parameters . 44
A.2.2 Wireless systems parameters . 44
A.3 Operational Environments . 45
A.3.1 Operational Environments definition . 45
A.3.2 Sky Attenuation Conditions . 46
A.3.3 Multipath Level . 47
A.3.4 Magnetic Conditions . 48
A.3.4.1 Output model . 48
A.3.4.2 Perturbation level . 49
A.3.5 Telecommunications Beacons . 49
A.4 Moving Location Target Scenario - Track trajectory . 49
A.5 Moving Location Target Scenario - Straight line trajectory. 51
A.6 Interference source definition . 51
A.7 Authenticity Threat Scenarios . 52
A.7.1 Scenarios description . 52
A.7.2 Moving Location Targets . 52
A.7.3 Static Location Targets . 52
A.7.4 Scenario parameters . 53
A.7.4.1 Spoofing attack classification . 53
A.7.4.1.0 Introduction . 53
A.7.4.1.1 Shadowed spoofing . 53
A.7.4.2 Total spoofing power . 54
A.7.4.3 Misleading information categories . 54
A.8 Integrity Threat Scenarios . 54
A.8.1 Integrity Threat definition . 54
A.8.2 Non-LoS tracking . 55
A.8.3 Pseudorange Ramp errors . 55
Annex B (informative): Differential GNSS: GBLS implementing differential GNSS and
integrity performance through RTCM standards . 56
B.1 Specific case of a GBLS implementing differential GNSS . 56
B.2 D-GNSS monitoring and integrity concept in RTCM standards . 57
B.2.1 Overall concept and implementation . 57
B.2.2 Monitoring and alerting . 58
B.2.3 D-GNSS integrity performance and system implementation . 58
ETSI

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6 ETSI TS 103 246-3 V1.3.1 (2020-10)
History . 60

ETSI

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7 ETSI TS 103 246-3 V1.3.1 (2020-10)
Intellectual Property Rights
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in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
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server) which are, or may be, or may become, essential to the present document.
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