SIST EN 16605:2025

SLOVENSKI STANDARD
01-februar-2025
Vesolje - Časovni sprejemnik Galileo - Funkcionalne in izvedbene zahteve ter s
tem povezani preskusi
Space - Galileo Timing Receiver - Functional and Performance Requirements and
associated Tests
Raumfahrt - Galileo Timing Receiver - Funktions- und Leistungsanforderungen und
zugehörige Tests
Espace - Récepteur de signaux Galileo pour référence temps - Exigences fonctionnelles
et de performances, et essais associés
Ta slovenski standard je istoveten z: EN 16605:2024
ICS:
33.070.40 Satelit Satellite
49.140 Vesoljski sistemi in operacije Space systems and
operations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 16605
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2024
ICS 33.070.40
English version
Space - Galileo Timing Receiver - Functional and
Performance Requirements and associated Tests
Espace - Récepteur de signaux Galileo pour référence Raumfahrt - Galileo Timing Receiver - Funktions- und
temps - Exigences fonctionnelles et de performances, Leistungsanforderungen und zugehörige Tests
et essais associés
This European Standard was approved by CEN on 20 September 2024.

CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical
references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to
any CEN and CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN and CENELEC member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium,
Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia,
Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.

CEN-CENELEC Management Centre:
Rue de la Science 23, B-1040 Brussels
© 2024 CEN/CENELEC All rights of exploitation in any form and by any means
Ref. No. EN 16605:2024 E
reserved worldwide for CEN national Members and for
CENELEC Members.
Contents
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 14
4 Galileo Timing Service . 17
4.1 Introduction to timing receivers and timing references . 17
4.2 Galileo Timing Service – Accuracy and Availability . 19
4.3 Galileo Timing Service –Integrity capability . 19
4.3.1 General. 19
4.3.2 Definition of a Fault-Free Timing solution . 19
4.3.3 Definition of a faulty timing solution . 20
4.3.4 High-Level Architecture of Galileo Timing Service . 20
4.3.5 Timing Flags processing . 21
4.3.6 Galileo timing receiver Decision Logic . 22
4.3.7 Time To Alert and Time To Notify . 26
4.3.8 T-RAIM Processing . 26
5 Requirements for Galileo timing receivers . 26
5.1 Definitions . 26
5.2 Minimum Equipment Characteristics . 26
5.3 Functional Requirements . 29
5.3.1 Constellations Processed . 29
5.3.2 Frequencies Processed . 29
5.3.3 Back-up Modes . 29
5.3.4 Dynamics of the User . 29
5.3.5 Time Scales . 30
5.3.6 Processing of Timing Flags and Integrity Requirements . 30
5.3.7 T-RAIM Functional Requirements and Consistency Checks . 35
5.3.8 Anti-Jamming Capabilities . 35
5.3.9 Galileo OS-NMA Processing . 37
5.3.10 Holdover Capabilities . 37
5.3.11 Multipath mitigation . 38
5.3.12 Special Configuration and Output Requirements . 38
5.4 Performance Requirements . 38
5.4.1 General. 38
5.4.2 Accuracy Requirements . 39
5.4.3 Availability Requirements . 39
5.4.4 Integrity Requirements . 40
5.4.5 T-RAIM Performances and thresholds . 42
5.4.6 Holdover Timeout . 42
6 Verification of Galileo timing receivers . 43
6.1 General. 43
6.2 Galileo timing receiver Test Policy . 43
6.3 Strategy for Galileo timing receivers Verification . 44
6.3.1 Verification Methods . 44
6.3.2 Galileo timing receivers Verification Strategy . 44
6.3.3 Galileo timing receiver Test Suite. 45
6.4 Test Environment . 50
6.4.1 General . 50
6.4.2 Record and Replay Test Environment . 50
6.5 Antenna conditions definition . 54
6.5.1 Open sky . 54
6.5.2 Obstructed open sky . 54
6.5.3 Light indoor . 56
6.6 Error Budgets for the Tests . 56
6.7 Traceability Matrix: Requirements vs Verification Method . 57
6.7.1 Traceability . 57
6.7.2 Receiver functionalities Verified by Review Method . 59
6.8 Galileo timing receiver tests . 59
6.8.1 Record and Replay test configuration . 59
6.8.2 Calibration of time delays . 65
6.8.3 For the Verification of Galileo timing receiver Functions (TC-01) . 65
6.8.4 GST Service Level 1 (TC-02) . 67
6.8.5 GST Service Level 2 (TC-03) . 68
6.8.6 GST Service Level 3 (TC-04) . 69
6.8.7 UTC Service Level 1 (TC-05) . 69
6.8.8 UTC Service Level 2 (TC-06) . 70
6.8.9 UTC Service Level 3 (TC-07) . 71
6.8.10 Performances in obstructed environment (TC-08). 72
6.8.11 Performances in light indoor environment (TC-09) . 73
6.8.12 Test on Robustness to Interferences: Nominal Conditions (TC-10) . 73
6.8.13 Test on Robustness to Interferences: Degraded Conditions (TC-11) . 74
6.8.14 Test on T-RAIM Performances (TC-12) . 76
6.8.15 Test on Receiver Noise (TC-13) . 80
Annex A (informative) GNSS Timing Equations . 82
Annex B (informative) Guidelines for Installation and Maintenance . 85
B
...