ccsds navigation working group david berry 10/01/2007
TRANSCRIPT
CCSDS Navigation Working Group
David Berry
10/01/2007
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Purpose
• Introduce new members of the CCSDS Navigation Working Group to the technical program of the Working Group
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Agenda
• CCSDS Overview• Navigation Working Group Overview• Navigation Working Group Documents• Q&A
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CCSDS & the Navigation Working Group
• CCSDS is an organization which acts as the “principal technical engine of ISO TC20/SC13”
• Develops international standards related to space data• Organization chart at
http://public.ccsds.org/sites/cwe/default.aspx • CCSDS consists of 6 general “Areas”• Areas are partitioned into 35 smaller groups called
“Working Groups” (WG), “Special Interest Groups” (SIG) and “Birds of a Feather Groups” (BOF)
• Each WG, SIG or BOF is associated with an Area• NAV WG is part of CCSDS Mission Operations and
Information Management Services Area (MOIMS)• Charter is to produce CCSDS Recommendations for
exchange formats of orbit, attitude, and tracking data
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CCSDS Areas (Overall Context)
Cross SupportServices
SpacecraftOnboardInterfaceServices
SpaceInternetworking
Services
SpaceLink
Services
Mission Operationsand Information
Management Services Commodity Communications &
Navigation Systems
Systems Engineering
Source: A. Hooke, NASA/JPL
GroundGround, GroundFlightOrbit Data Message (OPM/OEM), Attitude Data Message (APM/AEM), Tracking Data Message (TDM)XML Specification (NDM/XML)
FlightFlightOrbit Data Message (OPM/OEM), Attitude Data Message (APM/AEM),Tracking Data Message (TDM) XML Specification (NDM/XML)
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Standards Development Process
• A “Concept Paper” suggests need for standardization• Working Group chartered to develop Recommendation• Working Group develops material (iterative process)• Recommendation documents proceed through several
stages as they mature: Proposed (“White”), Draft (“Red”), final (“Blue”)
• White Books are internal to the Working Group• When White Book matures, promotion to Red Book• Formal Agency Review process commences (3 months)• When Agency Review is passed, prototyping (at least 2
interoperable instances) is complete and test reports filed, promotion to Blue Book occurs
• ISO standards development process is entered at an advanced stage (FDIS)
• “Green Books” are non-normative technical reports
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Nav WG Participating Membership
• The CCSDS Navigation Working Group has had regular participation from representatives of the following space agencies/organizations:• ASI• CNES• DLR• ESA • JAXA• NASA (JPL & GSFC)• ISO TC20/SC14/WG3
• Agencies that have recently named representatives to the Navigation WG are: FSA
• Other agencies that participate in CCSDS , but have not been involved in Navigation WG are: BNSC, CSA, INPE
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Nav WG Documents (“Color Coded”)
• Orbit Data Messages + Extensions
• Attitude Data Messages
• Tracking Data Message
• Navigation Data Messages / XML Specification
• Navigation Data—Definitions and Conventions
• The principal objectives for the Fall 2007 Meetings are to get the ADM and TDM to Blue Book status
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Tracking Data Message
• Standard message format for exchanging tracking data • TDM will support widely used tracking data types:
• Ground-based radiometrics: Doppler, range, angle, ΔDOR• Ancillary information (e.g., meteorological, media delays)• Extensible to future types (e.g., SC-to-SC Doppler/range)
• Work started 04/2004, became Red Book 11/2005 & 12/2006• Two Agency Review processes completed, ~270 RID’s
received, dispositioned, and added to TDM as applicable• Current level is Red Book 2.7• Prototyping is essentially complete; test plan/report written• Plan to progress to Blue Book in October 2007• Highest priority deliverable from standpoint of IOAG (the
Interagency Operations Advisory Group)
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• Write summary conclusion of test report• File prototyping test report• Petition the CCSDS Engineering Steering Group
(CESG) and CCSDS Management Council (CMC) for progression from Red Book to Blue Book
• Other desirable work• Complete XML representation of the TDM (currently
updated to R2.7 compatibility)• Agency infusion (implementation), which is a stated
priority of the IOAG
Remaining Work for “TDM Blue”
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Attitude Data Messages
• Two standard message formats for exchanging spacecraft attitude descriptions
• Attitude Parameter Message (APM) specifies an attitude state at epoch, and includes spacecraft properties, maneuvers, descriptive metadata; must be propagated
• Attitude Ephemeris Message (AEM) specifies a series of attitude states at multiple epochs, descriptive metadata, allows modeling of any number of torques
• Work started ~2003, became Red Book 11/2005• Agency Review completed 03/2006; 60+ RID’s received,
dispositioned, and added to ADM as applicable• Current level is Red Book 1.7• Prototyping is in progress• Plan to progress to Blue Book in October 2007
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• Complete design/development/testing of ADM Prototypes• In progress at CNES, NASA/GSFC
• File prototyping test report• Petition the CESG and CMC for progression from Red
Book to Blue Book
• Other desirable work• Complete XML representation of the ADM (currently
updated to R1.7 compatibility)• Agency infusion (implementation)
Remaining Work for “ADM Blue”
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Orbit Data Messages + Extensions
• Two standard message formats for exchanging orbit descriptions, soon to be three
• Orbit Parameter Message (OPM) is a state vector (position and veclocity at epoch, spacecraft properties, maneuvers, descriptive metadata); must be propagated
• Orbit Ephemeris Message (OEM) is an ephemeris (position and velocity at multiple epochs, descriptive metadata), allows modeling of any number of forces
• Work started ???, became CCSDS Blue Book 09/2004 (ISO Standard # 22644 as of 01/2006)
• Orbit Data Messages are used in daily operations• Extensions to the ODM are a current topic of the
Navigation WG via collaboration with ISO TC20/SC14, with visibility up to top levels of CCSDS and ISO TC20
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• Major Working Group Task for 2008• “Name the Baby” (new message) in the ODM• Formal Review: CCSDS Agency Review + ISO Review• Develop plan for prototyping• Complete design/development/testing of ODM
Prototypes• File prototyping test report• Petition the CESG and CMC for progression from Pink
Book to Blue Book
• Other desirable work• Complete XML representation of the ODM (currently
at 1.0 compatibility)• Agency infusion (implementation)
Remaining Work for “ODM Blue 2.0”
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Navigation Data Messages / XML Spec
• Describes an integrated XML schema for encoding the ADM, ODM, and TDM
• Directive to put Navigation WG Recommendations into XML format came from CMC ~2002
• Work started 05/2004, became Red Book 11/2005 (probably prematurely)
• One Agency Review process completed, <10 RID’s received, dispositioned, and added to NDM/XML as applicable
• Second agency review yet to be scheduled• Current level is Red Book 1.2• Plan to progress to Blue Book by end of 2008
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• Major Working Group task for 2008• Complete ADM and TDM 1.0 Blue Book progressions• Complete ODM Blue Book 2.0 (TC20/SC14 updates)• Update NDM/XML to represent final ADM, ODM, TDM• Complete Agency Review #2 (not yet scheduled)• Create prototyping plan• Complete design/development/testing of NDM/XML
Prototypes • File prototyping test report• Petition the CESG and CMC for progression from Red
Book to Blue Book
• Other desirable work• Agency infusion (implementation)
Remaining Work for “NDM/XML Blue”
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Navigation DataDefinitions and Conventions
• Contains technical material related to the Navigation Working Group Recommendations
• Non-normative document• Has a different development process (all internal to the
working group, with CESG approval)• Work started early in the history of the Navigation
Working Group• Most recent edition of the Green Book was published
11/2005• Current level is Green 2.0• Several updates to this document are in order (more
attitude info, covariance matrices, TLE overview, range units description)
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Useful Web Sites/Contacts
• Web Sites• www.ccsds.org – general web site of the CCSDS• http://cwe.ccsds.org/moims/default.aspx , then choose
the “MOIMS-NAV” tab on the far left menu• E-mail Address
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Acronyms and Abbreviations
• ADM Attitude Data Message• CCSDS Consultative Committee on Space Data
Systems• CESG CCSDS Engineering Steering Group• CMC CCSDS Management Council• ΔDORDelta Differential One-Way Ranging• ISO International Organization for Standardization• MOIMS Mission Operations & Information Mgmt
Services• NDM Navigation Data Messages• ODM Orbit Data Message• OEM Orbit Ephemeris Message• OPM Orbit Parameter Message• TDM Tracking Data Message• XML eXtensible Markup Language
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Q&A• ??? • ??? • ??? • ??? • ??? • ??? • ??? • ??? • ??? • ??? • ???