EN 16605:2024

Space - Galileo Timing Receiver - Functional and Performance Requirements and associated Tests

This document is intended to stablish and define functional and performance requirements and associated tests for Galileo Timing Receivers. This document covers the following topics related to Galileo Timing Receivers:
- GNSS constellations and frequencies processed: Galileo plus additionally GPS, with nominal mode being dual-frequency processing,
- Time scales processed, including at least Galileo System Time and Universal Time Coordinate,
- User dynamics, with two operation modes: static users with well-known and static antenna position and dynamics users with moving antenna,
- Holdover devices,
- Nominal and back-up modes, including single-frequency modes, single-constellation modes and holdover mode.
- Processing of timing integrity information disseminated by the Galileo System,
- Time Receiver Autonomous Integrity Monitoring processing,
- Anti-jamming and anti-spoofing capabilities, including Automatic Gain Control monitoring and Galileo Open Service Navigation Message Authentication processing,
- Robustness to multipath.
In addition, this document gives guidelines for the installation and maintenance of the receiver, including antenna, cabling and receiver installation, initial and periodic receiver calibration, and periodic maintenance.
On top of the functional requirements, performance requirements this document defines in terms of different key performance indicators such as:
- Accuracy, availability, continuity and integrity requirements,
- T-RAIM performances, including time to alert,
- Holdover performances including maximum degradation of the timing solution with time and maximum holdover time,
This document also gives a simple test suite to verify the most fundamental requirements of the Galileo Timing Receivers.

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

Vesolje - Časovni sprejemnik Galileo - Funkcionalne in izvedbene zahteve ter s tem povezani preskusi

General Information

• Status: Not Published
• Publication Date: 03-Dec-2024
• ICS: 33.070.40 - Satellite
• ICS: 49.140 - Space systems and operations
• Technical Committee: CEN/CLC/TC 5 - Space
• Drafting Committee: CEN/CLC/JTC 5/WG 9 - Galileo Timing Receivers
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 20-Sep-2024
• Due Date: 09-Jul-2024
• Completion Date: 20-Sep-2024
• Ref Project: oSIST prEN 16605:2024 - Space - Galileo Timing Receiver - Functional and Performance Requirements and associated Tests

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2024
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: prEN 16605
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 DRAFT
prEN 16605
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2024
ICS
English version
Space - Galileo Timing Receiver - Functional and
Performance Requirements and associated Tests
Raumfahrt - Galileo Timing Receiver - Funktions- und
Leistungsanforderungen und zugehörige Tests
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/CLC/JTC 5.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN and CENELEC 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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.Recipients of this draft are invited to submit, with their comments, notification
of any relevant patent rights of which they are aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

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. prEN 16605:2024 E
reserved worldwide for CEN national Members and for
CENELEC Members.
prEN 16605:2024 (E)
Contents
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 8
3 Terms, definitions and acronyms . 8
3.1 Acronyms . 8
3.2 Terms and definitions . 12
4 Galileo Timing Service . 17
4.1 Introduction to timing receivers and timing references . 17
4.2 Galileo Timing Service – Accuracy and Availability . 18
4.3 Galileo Timing Service –Integrity capability . 18
4.3.1 General. 18
4.3.2 Definition of a Fault-Free Timing solution . 19
4.3.3 Definition of a faulty timing solution . 19
4.3.4 High-Level Architecture of Galileo Timing Service . 19
4.3.5 Timing Flags processing . 20
4.3.6 Galileo timing receiver Decision Logic . 21
4.3.7 Time To Alert and Time To Notify . 25
4.3.8 T-RAIM Processing . 25
5 Requirements for Galileo timing receivers . 26
5.1 Definitions . 26
5.2 Minimum Equipment Characteristics . 26
5.3 Functional Requirements . 28
5.3.1 Constellations Processed . 28
5.3.2 Frequencies Processed . 28
5.3.3 Back-up Modes . 28
5.3.4 Dynamics of the User . 28
5.3.5 Time Scales . 29
5.3.6 Processing of Timing Flags and Integrity Requirements . 29
5.3.7 T-RAIM Functional Requirements and Consistency Checks . 34
5.3.8 Anti-Jamming Capabilities . 34
5.3.9 Galileo OS-NMA Processing . 36
5.3.10 Holdover Capabilities . 36
5.3.11 Multipath mitigation . 37
5.3.12 Special Configuration and Output Requirements . 37
5.4 Performance Requirements . 37
5.4.1 General. 37
5.4.2 Accuracy Requirements . 38
5.4.3 Availability Requirements . 38
5.4.4 Integrity Requirements . 39
5.4.5 T-RAIM Performances and thresholds . 41
5.4.6 Holdover Timeout . 41
6 Verification of Galileo timing receivers . 42
6.1 General. 42
6.2 Galileo timing receiver Test Policy . 42
6.3 Strategy for Galileo timing receivers Verification . 43
6.3.1 Verification Methods . 43
prEN 16605:2024 (E)
6.3.2 Galileo timing receivers Verification Strategy . 43
6.3.3 Galileo timing receiver Test Suite. 44
6.4 Test Environment . 49
6.4.1 General . 49
6.4.2 Record and Replay Test Environment . 49
6.5 Antenna conditions definition . 53
6.5.1 Open sky . 53
6.5.2 Obstructed open sky . 53
6.5.3 Light indoor . 55
6.6 Error Budgets for the Tests . 55
6.7 Traceability Matrix: Requirements vs Verification Method . 56
6.7.1 Traceability . 56
6.7.2 Receiver functionalities Verified by Review Method . 58
6.8 Galileo timing receiver tests . 58
6.8.1 Record and Replay test configuration . 58
6.8.2 Calibration of time delays . 64
6.8.3 For the Verification of Galileo timing receiver Functions (TC-01) . 64
6.8.4 GST Service Level 1 (TC-02) . 66
6.8.5 GST Service Level 2 (TC-03) . 67
6.8.6 GST Service Level 3 (TC-04) . 68
6.8.7 UTC Service Level 1 (TC-05) . 68
6.8.8 UTC Service Level 2 (TC-06) . 69
6.8.9 UTC Service Level 3 (TC-07) . 70
6.8.10 Performances in obstructed environment (TC-08). 71
6.8.11 Performances in light indoor environment (TC-09) . 72
6.8.12 Test on Robustness to Interferences: Nominal Conditions (TC-10) . 72
6.8.13 Test on Robustness to Interferences: Degraded Conditions (TC-11) . 73
6.8.14 Test on T-RAIM Performances (TC-12) . 75
6.8.15 Test on Receiver Noise
...