CCSDS Navigation Working Group David Berry 10/01/2007

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

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

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 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

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

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

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

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

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

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

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

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

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 10/01/2007

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

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

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

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

Useful Web Sites/Contacts 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 moims-nav@mailman.ccsds.org 10/01/2007

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 10/01/2007

Q&A ??? 10/01/2007