EN 16603-60-20:2020

SLOVENSKI STANDARD
01-november-2020
Nadomešča:
SIST EN 16603-60-20:2014
Vesoljska tehnika - Terminologija v zvezi s senzorji za zaznavanje zvezd in
specifikacija lastnosti
Space engineering - Star sensor terminology and performance specification
Raumfahrttechnik - Terminologie und Leistungsspezifikation für Sternensensoren
Ingénierie spatiale - Specification des performances et terminologie des senseurs
stellaires
Ta slovenski standard je istoveten z: EN 16603-60-20:2020
ICS:
01.040.49 Letalska in vesoljska tehnika Aircraft and space vehicle
(Slovarji) engineering (Vocabularies)
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 16603-60-20
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2020
ICS 01.040.49; 49.140
Supersedes EN 16603-60-20:2014
English version
Space engineering - Star sensor terminology and
performance specification
Ingénierie spatiale - Terminologie et spécification des Raumfahrttechnik - Terminologie und
performances des capteurs stellaires Leistungsspezifikation für Sternensensoren
This European Standard was approved by CEN on 20 May 2020.

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, Turkey and United Kingdom.

CEN-CENELEC Management Centre:
Rue de la Science 23, B-1040 Brussels
© 2020 CEN/CENELEC All rights of exploitation in any form and by any means Ref. No. EN 16603-60-20:2020 E
reserved worldwide for CEN national Members and for
CENELEC Members.
Table of contents
European Foreword . 5
Introduction . 7
1 Scope . 8
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 10
3.1 Terms from other standards . 10
3.2 Terms specific to the present standard . 10
3.3 Abbreviated terms. 29
3.4 Nomenclature . 30
4 Functional requirements . 31
4.1 Star sensor capabilities . 31
4.1.1 Overview . 31
4.1.2 Cartography . 32
4.1.3 Star tracking . 33
4.1.4 Autonomous star tracking . 33
4.1.5 Autonomous attitude determination . 34
4.1.6 Autonomous attitude tracking . 35
4.1.7 Angular rate measurement . 35
4.1.8 (Partial) image download. 36
4.1.9 Sun survivability . 37
4.2 Types of star sensors . 37
4.2.1 Overview . 37
4.2.2 Star camera . 37
4.2.3 Star tracker . 37
4.2.4 Autonomous star tracker . 38
4.3 Reference frames . 38
4.3.1 Overview . 38
4.3.2 Provisions . 38
4.4 On-board star catalogue . 38
5 Performance requirements . 40
5.1 Use of the statistical ensemble . 40
5.1.1 Overview . 40
5.1.2 Provisions . 41
5.2 Verification methods . 42
5.2.1 Overview . 42
5.2.2 Provisions for single star performances . 42
5.2.3 Provisions for attitude performances . 42
5.2.4 Provision for tests . 42
5.3 <> . 43
5.4 General performance requirements . 43
5.5 General performance metrics . 45
5.5.1 Overview . 45
5.5.2 Bias . 45
5.5.3 Thermo elastic error . 46
5.5.4 FOV spatial error . 46
5.5.5 Pixel spatial error . 47
5.5.6 Temporal noise . 48
5.5.7 Aberration of light . 49
5.5.8 Measurement date error . 50
5.5.9 Measured output bandwidth . 50
5.6 Cartography . 50
5.7 Star tracking . 51
5.7.1 Additional performance conditions . 51
5.7.2 Single star tracking maintenance probability . 51
5.8 Autonomous star tracking . 51
5.8.1 Additional performance conditions . 51
5.8.2 Multiple star tracking maintenance level . 52
5.9 Autonomous attitude determination . 52
5.9.1 General . 52
5.9.2 Additional performance conditions . 52
5.9.3 Verification methods . 53
5.9.4 Attitude determination probability . 53
5.10 Autonomous attitude tracking . 54
5.10.1 Additional performance conditions . 54
5.10.2 Maintenance level of attitude tracking . 55
5.10.3 Sensor settling time . 56
5.11 Angular rate measurement . 56
5.11.1 Additional performance conditions . 56
5.11.2 Verification methods . 56
5.12 Mathematical model . 57
5.13 Robustness to solar events . 57
5.13.1 Additional robustness conditions . 57
5.13.2 Continuity of tracking during a solar event . 58
5.13.3 Ability to solve the lost in space problem during a solar event . 59
5.13.4 Flux levels . 59
Bibliography . 88

Figures
Figure 3-1: Star sensor elements – schematic . 13
Figure 3-2: Example alignment reference frame . 15
Figure 3-3: Boresight reference frame . 16
Figure 3-4: Example of Inertial reference frame . 16
Figure 3-5: Mechanical reference frame . 17
Figure 3-6: Stellar reference frame . 18
Figure 3-7: Schematic illustration of reference frames . 18
Figure 3-8: Schematic timing diagram . 20
Figure 3-9: Field of View . 22
Figure 3-10: Aspect angle to planetary body or sun . 23
Figure 4-1: Schematic generalized Star Sensor model . 32

Figure B-1 : Rotational and directional Error Geometry . 65
Figure F-1 : Angle rotation sequence . 76
Figure H-1 : Example of detailed data sheet . 82

Tables
Table C-1 : Minimum and optional capabilities for star sensors . 69
Table G-1 : Contributing error sources . 78
Table I-1 : Command table . 84
Table I-2 : Telemetry table . 86

European Foreword
This document (EN 16603-60-20:2020) has been prepared by Technical
Committee CEN-CENELEC/TC 5 “Space”, the secretariat of which is held by
DIN.
This standard (EN 16603-60-20:2020) originates from ECSS-E-ST-60-20C Rev. 2.
This European Standard shall be given the status of a national standard, either
by publication of an identical text or by endorsement, at the latest by February
2021, and conflicting national standards shall be withdrawn at the latest by
February 2021.
Attention is drawn to the possibility that some of the el
...