SIST EN 16605:2025
(Main)Space - Galileo Timing Receiver - Functional and Performance Requirements and associated Tests
Space - Galileo Timing Receiver - Functional and Performance Requirements and associated Tests
This document specifies the functional and performance requirements and associated tests for Galileo
timing receivers. The approach for this document is that of a performance based, meaning that no specific
algorithm implementation is required. Instead, performance requirements are specified together with a
corresponding test suite for verification.
This document is applicable to the Galileo chipset. This document does not apply to other sensors and/or
additional processing that a higher synchronization Unit can implement on top of the Galileo chipset.
This document is applicable to the following aspects related to Galileo timing receivers:
— GNSS constellations and frequencies processed: Galileo Dual-Frequency. Other modes are optional,
as explained below;
— time scales, including Galileo System Time and Coordinated Universal Time;
— Services Levels, this document covers the 2 levels of Service for GST and for UTC to be provided by
Galileo Time Service in the first place. The document also anticipates a third Service Level to be
provided in the future, for which an update of the document will be needed;
— user dynamics: fixed users, defined as static users with precise knowledge of the antenna position, is
the baseline mode;
— processing of Timing Service Message disseminated by the Galileo System;
— local timing integrity barriers: As a minimum, Time Receiver Autonomous Integrity Monitoring
processing (T-RAIM);
— robustness to interferences;
— Galileo Open Service Navigation Message Authentication processing;
— robustness to multipath.
This document does not apply to the processing of GPS constellation but this does not preclude
Manufacturers to implement GPS processing within the Galileo timing receivers, even if not addressed in
this document. The use of other GNSS constellations is not forbidden by this document but the
requirements and tests are defined considering Galileo-only, including those related to the integrity of
the timing solution.
This document does not apply to single-frequency modes. This does not preclude manufacturers to
implement single-frequency modes within the Galileo timing receivers, even if not addressed in this
document, as a back-up of the nominal Dual-Frequency mode, and reversion mechanisms. It is important
to remark that the integrity of the timing solution is only specified for Galileo Dual-Frequency mode.
The Galileo timing receivers is only applicable to users operating in static conditions. This document does
not apply to moving users.
On top of the functional requirements, performance requirements are specified in this document in terms
of different key performance indicators such as:
— accuracy, availability and integrity requirements;
— local barriers, T-RAIM performances.
This document also provides the verification matrix and specifies the test suite to verify the most
fundamental requirements of the Galileo timing receivers.
Finally, this document specifies a subclause dedicated to guidelines for the installation and maintenance
of the Galileo timing receivers. This is a comprehensive subclause, including provisions for the antenna,
cabling and receiver installation, as well as the calibration of time delays.
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
Ta dokument določa funkcionalne in izvedbene zahteve ter s tem povezane preskuse za časovne sprejemnike Galileo. Pristop za ta dokument temelji na zmogljivosti, kar pomeni, da ni potrebna nobena posebna implementacija algoritma. Namesto tega so izvedbene zahteve določene skupaj z ustreznim preskuševalnim nizom za preverjanje.
Ta dokument se uporablja za nabor čipov Galileo. Ta dokument se ne uporablja za druge senzorje in/ali dodatno obdelavo, ki jo sinhronizacijska enota višje ravni lahko izvede poleg nabora čipov Galileo.
Ta dokument se uporablja za naslednje vidike v zvezi s časovnimi sprejemniki Galileo:
– obdelane konstelacije in frekvence GNSS: dvofrekvenčni sprejemnik Galileo. Drugi načini so izbirni, kot je pojasnjeno v nadaljevanju;
– časovne okvire, vključno s sistemskim časom Galileo in koordiniranim univerzalnim časom;
– ravni storitev, pri čemer ta dokument zajema dve ravni storitev za sistemski čas Galileo (GST) in za koordinirani univerzalni čas (UTC),
ki ju v prvi vrsti zagotavlja storitev za določanje točnega časa Galileo. Dokument predvideva tudi tretjo raven storitev, ki bo zagotovljena v prihodnosti, za kar bo potrebna posodobitev dokumenta;
– dinamiko uporabnikov: fiksni uporabniki, opredeljeni kot statični uporabniki z natančnim poznavanjem položaja antene, so osnovni način;
– obdelavo sporočila storitve za določanje točnega časa, ki ga razširja sistem Galileo;
– ovire v zvezi s celovitostjo določanja točnega lokalnega časa: vsaj obdelava samostojnega spremljanja celovitosti prek časovnega sprejemnika (T-RAIM);
– odpornost na motnje;
– obdelavo avtentikacije navigacijskih sporočil z odprto storitvijo Galileo;
– odpornost na večpotje.
Ta dokument se ne uporablja za obdelavo konstelacije GPS, vendar to proizvajalcem ne preprečuje, da v časovnih sprejemnikih Galileo izvajajo obdelavo GPS, tudi če ni obravnavana v tem dokumentu. Ta dokument ne prepoveduje uporabe drugih konstelacij GNSS, vendar so zahteve in preskusi opredeljeni zgolj glede na sistem Galileo, vključno s tistimi v zvezi s celovitostjo rešitve za določanje točnega časa.
Ta dokument se ne uporablja za enofrekvenčne načine. Vendar to proizvajalcem ne preprečuje, da v časovnih sprejemnikih Galileo izvajajo enofrekvenčne načine, tudi če niso obravnavani v tem dokumentu, kot nadomestilo nominalnega dvofrekvenčnega načina, in mehanizme preusmeritve. Pomembno je opozoriti, da je celovitost rešitve za določanje točnega časa določena samo za dvofrekvenčni način sistema Galileo.
Časovne sprejemnike Galileo lahko uporabljajo samo uporabniki v statičnih pogojih. Ta dokument se ne uporablja za premikajoče se uporabnike.
Poleg funkcionalnih zahtev so v tem dokumentu določene tudi izvedbene zahteve za različne ključne kazalnike uspešnosti, kot so:
– zahteve glede natančnosti, razpoložljivosti in celovitosti;
– lokalne ovire, izvajanje samostojnega spremljanja celovitosti prek časovnega sprejemnika.
Ta dokument zagotavlja tudi metriko preverjanja in določa preskuševalni niz za preverjanje najosnovnejših zahtev časovnih sprejemnikov Galileo.
Ta dokument ima tudi podtočko, namenjeno smernicam za namestitev in vzdrževanje časovnih sprejemnikov Galileo. To je obsežna podtočka, ki vključuje tudi določbe za namestitev antene, kablov in sprejemnika ter umerjanje zakasnitev.
General Information
Standards Content (Sample)
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
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