EN 17350:2020
(Main)SCM - Scheduling and Commanding Message - Standard
SCM - Scheduling and Commanding Message - Standard
1.1 Purpose:
The "Scheduling and Commanding Messages" (SCM) specifies a standard format for observing system commanding and scheduling. This document aims to ease the planning and operation processes and to reduce the effors from researchers that use several different observing systems and/or simulation software products.
The SCM establishes a common language for exchanging information on planning, scheduling, and executing observations of celestial objects. In the end this will:
a) Facilitate interoperability and enable consistent warning between data originators who supply celestial observations and the entities or researchers who use it; and
b) Facilitate the automation of observation processes.
1.2 Applicability:
The SCM is applicable to ground-based activities related to the planning, scheduling, and execution of the observations of celestial objects. It is used by planning software, scheduling software, telescope commanding software. It is applicable for optical telescopes.
SCM - Planungs- und Befehlsnachricht - Standard
1.1 Zweck:
Planungs- und Kommando-Nachricht (en: Scheduling and Commanding Messages, SCM) legt ein Standardformat für die Zeitplanung und Befehlserteilung von Beobachtungssystemen fest. Dieses Dokument soll Planungs- und Betriebsprozesse vereinfachen und den Aufwand für Forscher reduzieren, die mehrere verschiedene Beobachtungssysteme und/oder Simulationssoftwareprodukte verwenden.
Die SCM legt eine allgemeine Sprache für den Austausch von Informationen zu Planung, Zeitplanung und Durchführung von Beobachtungen von Himmelskörpern fest. Dadurch wird letztlich Folgendes erreicht:
a) die Interoperabilität wird vereinfacht und das Ausgeben einheitlicher Warnungen zwischen Datenurhebern, die Himmelsbeobachtungen durchführen, und den Stellen oder Forschern, die diese Daten nutzen, ermöglicht und
b) die Automatisierung von Beobachtungsprozessen wird vereinfacht.
1.2 Anwendbarkeit:
Der SCM-Standard ist auf bodengestützte Aktivitäten hinsichtlich der Planung, Zeitplanung und Durchführung von Beobachtungen von Himmelskörpern anwendbar. Er wird von Planungssoftware, Terminplanungssoftware und Teleskop-Befehlssoftware eingesetzt. Er ist bei optischen Teleskopen anwendbar.
SCM - Message de planification et de commande - Norme
1.1 Objet :
Le « SCM » (Scheduling and Commanding Message) spécifie un format normalisé pour les commandes et la planification du système d'observation. Le présent document vise à faciliter les processus de planification et d'exploitation et à alléger le travail des chercheurs qui utilisent plusieurs systèmes d'observation et/ou logiciels de simulation différents.
Le SCM définit un langage commun permettant d'échanger des informations sur la planification, l'ordonnancement et la réalisation d'observations d'objets célestes. Au final, cela permettra :
a) de faciliter l'interopérabilité et de transmettre des notifications cohérentes entre les émetteurs de données qui fournissent les observations célestes et les entités ou les chercheurs qui les utilisent ; et
b) de faciliter l'automatisation des processus d'observation.
1.2 Applicabilité :
Le SCM s'applique aux activités au sol liées à la planification, à l'ordonnancement et à la réalisation d'observations d'objets célestes. Il est utilisé par des logiciels de planification, d'ordonnancement et de commande de télescope. Il s'applique aux télescopes optiques.
SCM - Obrazec za časovno razporejanje in vodenje - Standardizirani format
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2020
SCM - Obrazec za časovno razporejanje in vodenje - Standardizirani format
SCM - Scheduling and Commanding Message - Standard
Raumfahrt - Überwachung der Weltraumlageerfassung - Planungs- und Kommando-
Nachricht
SCM - Message de planification et de commande - Norme
Ta slovenski standard je istoveten z: EN 17350:2020
ICS:
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 17350
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2020
ICS 49.140
English version
SCM - Scheduling and Commanding Message - Standard
SCM - Message de planification et de commande - SCM - Planungs- und Befehlsnachricht - Standard
Norme
This European Standard was approved by CEN on 17 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 17350:2020 E
reserved worldwide for CEN national Members and for
CENELEC Members.
Contents Page
European foreword . 4
0 Introduction . 5
0.1 Document structure . 5
0.2 Verbal conventions . 5
1 Scope . 6
1.1 Purpose . 6
1.2 Applicability . 6
2 Normative references . 6
3 Terms, definitions, symbols and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Symbols and abbreviations . 9
4 Overview — Context of the document . 10
5 General nature of the standard — Documentation within the format . 11
6 SCM structure and content . 11
6.1 General structure . 11
6.2 Nested logical segments in the format. 15
6.3 Auxiliary messages . 15
6.4 General rules . 15
6.5 OS Control Computer and OS Scheduler Inputs . 17
6.6 Quantization of Commands/Requests . 18
6.7 Parameter Types . 18
7 Detailed SCM Syntax . 19
7.1 Introduction: First-Level Structure . 19
7.2 Definition of the segment 'header' . 20
7.3 Definition of the segment 'metaData' . 21
7.4 Definition of the segment 'commonData' . 23
7.5 Definition of the segment 'command' . 23
7.6 Definition of the segment 'scheduleRequest' . 34
7.7 Macros . 46
8 Sequence higher level structures . 46
8.1 Higher Level logical structures (“sequence” segments) . 46
8.2 Handling of FITS header keywords — General expected behaviour in regard to
writing to FITS headers . 49
Annex A (informative) Commanding and Scheduling Message background . 50
Annex B (informative) Examples . 51
B.1 Commanding a Series of Observations . 51
B.2 Requesting Follow-up observations two hours apart . 54
Annex C (informative) Survey Strategy Types and Related Parameter Requirements —
Description of Survey Strategies . 59
C.1 General . 59
C.2 Parameter Requirements for Survey Strategy Type 1 (vertical strip) . 61
C.3 Parameter Requirements for Survey Strategy Type 2 (horizontal strip) . 61
C.4 Parameter Requirements for Survey Strategy Type 3 (free mosaic) . 61
Annex D (informative) Handling of Filter Requests . 62
D.1 Filter specification. 62
D.2 Specifying narrowband filter types (wavelength value) . 63
Bibliography . 64
European foreword
This document (EN 17350:2020) has been prepared by Technical Committee CEN/CLC/JTC 5 “Space”,
the secretariat of which is held by DIN.
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 elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to announce this Technical Specification: 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 the
United Kingdom.
0 Introduction
0.1 Document structure
Clause 2 provides an overview of the SCM.
Clause 3 describes the scope and general nature of the SCM.
Clause 4 describes the general format of the SCM standard.
Clause 5 describes the detailed syntax of SCM communications.
Clause 6 provides additional information about headers.
Annex A (informative) provides SCM background.
Annex B (informative) provides SCM examples.
Annex C (informative) describes the survey strategy types and related parameter requirements.
Annex D (informative) informs about the handling of filter requests.
0.2 Verbal conventions
The following conventions apply:
a) 'shall' implies a requirement;
b) 'should' implies a recommendation;
c) 'may' implies a permission; and
d) 'is', 'are', and 'will' denote factual statements.
1 Scope
1.1 Purpose
The “Scheduling and Commanding Messages” (SCM) specifies a standard format for observing system
commanding and scheduling. This document aims to ease the planning and operation processes and to
reduce the efforts from researchers that use several different observing systems and/or simulation
software products.
The SCM establishes a common language for exchanging information on planning, scheduling, and
executing observations of celestial objects. In the end this will:
a) Facilitate interoperability and enable consistent warning between data originators who supply
celestial observations and the entities or researchers who use it; and
b) Facilitate the automation of observation processes.
1.2 Applicability
The SCM is applicable to ground-based activities related to the planning, scheduling, and execution of
the observations of celestial objects. It is used by planning software, scheduling software, telescope
commanding software. It is applicable for optical telescopes.
2 Normative references
There are no normative references in this document.
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
3.1.1
Observing System Command File
“observation plan”
data file which is used to control an observing system (OS), which contains absolute information on
actions the OS is due to perform, e.g. absolute times and sky coordinates for observations, and which is
read by an OS control computer that still processes part of their content (e.g. conversion of equatorial
coordinates to telescope hardware coordinates, execution of pre-defined standard routines for
calibration processes that are called by a single entry in the command file, etc.) and sends commands to
the hardware drivers
3.1.2
Observing System Scheduler Input File
“scheduler request”
data file providing input to an observation scheduler
Note 1 to entry: Opposed to Observing system command files, these files usually do not contain absolute
information on when an OS is due to perform a certain action, but rather constraints that allow a scheduler to
flexibly allocate the requested actions. The scheduler, on the other hand, can write command files which are
subsequently passed on to an OS control computer.
3.1.3
Hardware Driver Input
commands that are produced by an OS control computer and are selectively sent to the according
hardware drivers, e.g. the telescope mount drivers, dome drivers, etc.
3.1.4
Near-Earth Object
NEO
Solar System objects whose orbit brings them into close proximity with the Earth, which all have a
...
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