CCSDS Navigation Working Group David Berry 01/16/2007

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

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

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 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

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

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

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

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

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 # 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 01/16/2007

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

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

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

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

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

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

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

Useful Web Sites/Contacts www.ccsds.org – general web site of the CCSDS E-mail Address moims-nav@mailman.ccsds.org 01/16/2007

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

Q&A ??? 01/16/2007