1. CCSDS Navigation Working Group
David Berry
10/01/2007

2. Purpose
Introduce new members of the CCSDS Navigation Working Group to the technical program of the Working Group
10/01/2007

3. Navigation Working Group Overview Navigation Working Group Documents
Agenda
CCSDS Overview
Navigation Working Group Overview
Navigation Working Group Documents
Q&A
10/01/2007

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 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
10/01/2007

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
10/01/2007
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
10/01/2007

7. 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
10/01/2007

8. 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
10/01/2007

9. 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 & 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)
10/01/2007

10. Remaining Work for “TDM Blue”
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
10/01/2007

11. 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
10/01/2007

12. Remaining Work for “ADM Blue”
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)
10/01/2007

13. 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 # 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
10/01/2007

14. Remaining Work for “ODM Blue 2.0”
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)
10/01/2007

15. 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
10/01/2007

16. Remaining Work for “NDM/XML Blue”
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)
10/01/2007

17. 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, 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)
10/01/2007

18. Useful Web Sites/Contacts
– general web site of the CCSDS
, then choose the “MOIMS-NAV” tab on the far left menu
Address
10/01/2007

19. 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
10/01/2007

20. Q&A
???
10/01/2007