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

2. 2 Purpose Introduce new members of the CCSDS Navigation Working Group to the technical program of the Working Group

3. 01/16/20073 Agenda CCSDS Overview Navigation Working Group Overview Navigation Working Group Documents Q&A

4. 01/16/20074 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 http://public.ccsds.org/sites/cwe/default.aspx 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

5. 01/16/20075 CCSDS Areas (Overall Context) Cross Support Services Spacecraft Onboard Interface Services Space Internetworking Services Space Link Services Mission Operations and Information Management Services Commodity Communications & Navigation Systems Systems Engineering Source: A. Hooke, NASA/JPL Ground  Ground, Ground  Flight Orbit Data Message (OPM/OEM), Attitude Data Message (APM/AEM), Tracking Data Message (TDM) XML Specification (NDM/XML) Flight  Flight Orbit Data Message (OPM/OEM), Attitude Data Message (APM/AEM), Tracking Data Message (TDM) XML Specification (NDM/XML)

6. 01/16/20076 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

7. 01/16/20077 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

8. 01/16/20078 Nav WG Documents (“Color Coded”) Orbit Data Messages Attitude Data Messages Tracking Data Message Navigation Data Messages / XML Specification Navigation Data—Definitions and Conventions

9. 01/16/20079 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 # 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

10. 01/16/200710 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

11. 01/16/200711 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) Remaining Work for “ADM Blue”

12. 01/16/200712 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)

13. 01/16/200713 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 Remaining Work for “TDM Blue”

14. 01/16/200714 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

15. 01/16/200715 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) Remaining Work for “NDM/XML Blue”

16. 01/16/200716 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

17. 01/16/200717 Useful Web Sites/Contacts Web Sites www.ccsds.org – general web site of the CCSDSwww.ccsds.org E-mail Address moims-nav@mailman.ccsds.org

18. 01/16/200718 Acronyms and Abbreviations ADMAttitude Data Message CCSDSConsultative Committee on Space Data Systems CESGCCSDS Engineering Steering Group CMCCCSDS Management Council ΔDORDelta Differential One-Way Ranging ISOInternational Organization for Standardization MOIMSMission Operations & Information Mgmt Services NDMNavigation Data Messages ODMOrbit Data Message OEMOrbit Ephemeris Message OPMOrbit Parameter Message TDMTracking Data Message XMLeXtensible Markup Language

19. 01/16/200719 Q&A ???