1. CCSDS Navigation Working Group
David Berry
01/16/2007

2. Purpose
Introduce new members of the CCSDS Navigation Working Group to the technical program of the Working Group
01/16/2007

3. Navigation Working Group Overview Navigation Working Group Documents
Agenda
CCSDS Overview
Navigation Working Group Overview
Navigation Working Group Documents
Q&A
01/16/2007

4. 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
CCSDS consists of 6 general “Areas”
Areas are partitioned into 34 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
01/16/2007

5. CCSDS Areas (Overall Context)
FlightFlight
Orbit Data Message (OPM/OEM),
Attitude Data Message (APM/AEM),
Tracking Data Message (TDM)
XML Specification (NDM/XML)
Spacecraft
Onboard
Interface
Services
Space
Internetworking
Services
Mission Operations
and Information
Management Services
Commodity
Communications & Navigation Systems
Space
Link
Services
GroundGround, GroundFlight
Orbit Data Message (OPM/OEM),
Attitude Data Message (APM/AEM),
Tracking Data Message (TDM)
XML Specification (NDM/XML)
Systems Engineering
Cross Support
Services
01/16/2007
Source: A. Hooke, NASA/JPL

6. 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
01/16/2007

7. Nav WG Participating Membership
The CCSDS Navigation Working Group has had regular participation from representatives of the following space agencies:
CNES
DLR
ESA
JAXA
NASA (JPL & GSFC)
Agencies that have recently named representatives to the Navigation WG are: ASI, FSA, ISO TC20/SC14/WG3
Other agencies that participate in the overall CCSDS standards development process, but have not been involved in Navigation WG are: BNSC, CSA, INPE
01/16/2007

8. Nav WG Documents (“Color Coded”)
Orbit Data Messages
Attitude Data Messages
Tracking Data Message
Navigation Data Messages / XML Specification
Navigation Data—Definitions and Conventions
01/16/2007

9. Two standard message formats for exchanging orbit descriptions
Orbit Data Messages
Two standard message formats for exchanging orbit descriptions
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 # 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
01/16/2007

10. 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 1.4
Plan to progress to Blue Book in 2007
01/16/2007

11. Remaining Work for “ADM Blue”
Complete design/development/testing of ADM Prototypes
Planned by CNES, NASA/GSFC
Petition the CCSDS Engineering Steering Group and CCSDS Management Council for progression from Red Book to Blue Book
Other desirable work
Complete XML representation of the ADM
Agency infusion (implementation)
01/16/2007

12. Standard message format for exchanging tracking data
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
One Agency Review process completed, ~180 RID’s received, dispositioned, and added to TDM as applicable
Second agency review commenced 12/2006
Current level is Red Book 2.0
Plan to progress to Blue Book in 2007
Highest priority deliverable from standpoint of IOAG (the Interagency Operations Advisory Group)
01/16/2007

13. Remaining Work for “TDM Blue”
Complete Agency Review #2 (27-Dec-2006 to 30-Mar-2007)
Complete design/development/testing of TDM Prototypes
Planned by DLR, ESA, NASA/JPL
Petition the CCSDS Engineering Steering Group and CCSDS Management Council for progression from Red Book to Blue Book
Other desirable work
Complete XML representation of the TDM
Agency infusion (implementation), which is a stated priority of the IOAG
01/16/2007

14. 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 1.1 (1.2 in progress)
Plan to progress to Blue Book in late 2007 / early 2008
01/16/2007

15. Remaining Work for “NDM/XML Blue”
Complete ADM Blue Book progression
Complete TDM Blue Book progression
Update NDM/XML to represent final ADM and TDM
Complete Agency Review #2 (not yet scheduled)
Complete design/development/testing of NDM/XML Prototypes
No plan for this yet
Petition the CCSDS Engineering Steering Group and CCSDS Management Council for progression from Red Book to Blue Book
Other desirable work
Agency infusion (implementation)
01/16/2007

16. Navigation Data Definitions 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)
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
No current plan to update this document
01/16/2007

17. Useful Web Sites/Contacts
– general web site of the CCSDS
Address
01/16/2007

18. Acronyms and Abbreviations
ADM Attitude Data Message
CCSDS Consultative Committee on Space Data Systems
CESG CCSDS Engineering Steering Group
CMC CCSDS Management Council
ΔDOR Delta 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
01/16/2007

19. Q&A
???
01/16/2007