nasa hq office of space flight nasa data systems standards program ( ndssp ) nasa’s ccsds...

Page: AZD - 1 September 21, 2002

NASA HQOffice of Space Flight

• NASA DATA SYSTEMS STANDARDS PROGRAM ( NDSSP ) •

NASA’s CCSDS REORGANIZATION PROPOSAL

NASA DATA SYSTEMS STANDARDS PROGRAM (NDSSP)

CCSDS Reorganization(US Proposal)

Andrew Z. DowenNDSS Program Manager

818/354-8191

[email protected]





Drivers for change: NASA’s future mission requirements Technical discipline alignment

Current Organization & Work Item Allocation Results of Re-Organization

New Organization Re-allocation of Work Items Panel SLC (Space Link Communications)

Content and Deliverables Panel SDT (Space Data Transfer)

Content and Deliverables Panel SSA (Space System Applications)

Content and Deliverables

AGENDA





INCREASED SPACE SEGMENT CAPBILITIES More miniaturization, more missions, more bang for the buck Higher date rates, more powerful onboard processing Constellations and Formation Flying

Inter Spacecraft Communications Positioning Relative to Each Other

Autonomous Exploration Less reliance on “Joystick Operations.” Dynamic Response to Environment (Precision EDL, Rendezvous & Docking)

Highly networked Re-configurable web of orbiting and landed sensors for in-situ, long-term and detailed

observation, prediction and analysis.

HIGHLY DISTRIBUTED MULTI-ORGANIZATION DESIGN AND OPERATIONS TEAMS

NASA’S FUTURE: MORE MISSIONS, MORE COMPLEXITY





A1 A2 AnDiscipline 1:

ApplicationsA1 A2 An

Space Data Systems: Technical Disciplines

InternetSpace Networks

Discipline 2:

Networking

PointTo

Point

PointTo

Point

Discipline 3:

Wireless Links





New Organization Associates related tasks and technical disciplines within new

organizational elements RE-Allocates work items New Panels clarify responsibilities for wireless links, data networking

services, and end-to-end application services Groups tasks in related technical domains Provides for better skills mix within Panels Maintains most interfaces within Panels, but some cross-support needed

Finally provides a clear home for architecture and end to end activities Provides for end to end view for some services Cross-cuts space / ground boundary Clean boundary between Applications and Communications

Clearly describes the role of the Technical Steering Group (TSG)

Results of Re-Organization





Consultative Committee for Space Data Systems (CCSDS)Current Organization & Work Item Allocation

Industry Associates ISO/TC20/SC13

Liaisons

PPAANN EELL 33

SPACELINK

EXTENTION

PPAA NN EELL 22

INFORMATION

INTERCHANGE

SERVICES

SPACE

COMMUNICATIONS

PPAA NN EELL 11

MANAGEMENTMANAGEMENT

COUNCILCOUNCIL

Technical Steering GroupSecretariatXML WGArch WGS/C M&C WG

Pgm A - Data Admin & Data ManagementPgm B - Data StructuresPgm C - LanguagesPgm D - S/W ImplementationPgm E - Data Archives

WG 1 - SLE Mgmt Svc & Ref ArchWG 2/3 - SLE Transfer Svc SpecWG 5 - SLE Transfer Svc API & Security

P1A - Space LinksP1B - CodingP1C - CompressionP1E - RF& ModulationP1F - Upper Layer Protocols & ServicesP1J - NavigationP1K - S/C Onboad I/F





Consultative Committee for Space Data Systems (CCSDS)New Organization & Re-Allocation of Work Items

Tasks: 2.1-2.5, 3.1, 3.2, 3.4, 3.54.6, 4.7, 5.5

ARCHITECTURE BOARD

WG E – Data Archiving

PANEL SLC

Space Link Communications





Re-allocation of Work Items Conceptual Approach:

Associate like items of work based upon the ISO layer the work is at and affinities with similar tasks

Include consideration of the service interfaces elements expose to users Where cross panel considerations arise ensure that responsibility is clearly

assigned to just one working group (e.g. Nav & Trk has responsibility for their product files, the means to deliver them, and the link layer observables used to generate them)

Rationale Panel SLC includes all link and physical layer work Panel SDT includes all network, transport and data transfer services,

including their associated user applications Panel SSA includes all of the system level and applications level services

Results of Re-Organization





The Architecture Board is considered to be a permanent element of the MC

Responsible for a clear description, evolution and control of the architecture

Responsible for documenting and maintaining the documents related to the CCSDS Domain architecture

Responsible to resolve architecture issues brought to it from MC and TSG

Membership (approved by MC): Delegates nominated by the Panels based upon their technical expertise

No more than 7 members

Chief ArchitectSelected from and by members

Two years nominal term, may be extended

Results of Re-Organization (Cont.)





Technical Steering Group (TSG) is a truly technical entityResponsible for:

Cross panel system engineering

Architecture implementation

TSG Chairman appointed by MCTwo years nominal term, may be extended

Responsible for technical progress and direction of TSG tasks

Promotes cross-panel awareness of the status and nature of the CCSDS program

Prepares executive summary of TSG progress and reports to the MC

Resolves cross panel issues

TSG Members Panel and sub-panel chairs or their nominees

Selected technical experts

Others by invitation






Panel SLC (Space Link Communications) Content

WG A - Space Links WG B – Coding WG C – Compression WG D - RF & Modulation WG E - Optical Comm

• Includes all physical and link layer standards• Supports any future work across coding / modulation boundary, and any

interactions between compression, link and coding layers• Compression is included because it has skills in common with coding and

there may be interactions• Includes new optical comm physical and link layer standards as they are

required and any mods to existing standards to accommodate characteristics of optical comm






Panel SLC (Space Link Communications) Products

WG A - Space Links Revised Prox-1 Red Book and Green Book for Space Link Identifiers,

include SAMU Update Prox-1 Reference Implementation to conform to revised Red Book Studies of Unified Link Layer & DVB-S Application Profiles for Mars

WG B – Coding Coding Green Book Study of high rate codes and integrated coding & modulation approaches

WG C – Compression WG D - RF & Modulation

Modulation Green Book with Power and Bandwidth Efficient modulation approaches

Studies of H/W distortions and effects of UWB emissions WG E - Optical Comm

Optical Comm coping and modulation standards Pink Sheets for other link layer books as needed






Results of Re-Organization (Cont.) Panel SDT (Space Data Transfer)

Content WG A - Upper Layer Protocols & Internet Services WG B - S/C Onboard I/F, including Message Transfer & Middleware Svcs WG C - Product Transfer Svcs (include SLE & CFDP) Includes all network, transport, and upper layer data transfer

standards and any related data transfer application interfaces Includes all SCPS protocols and data transfer applications, gets

support from Panel SSA for security Includes S/C onboard I/F includes all layers up to message transfer

and middleware from old P1K. includes S/C specific services like C&DA, will get support from Panel SSA for S/C Mon & Con Deliverables

Supports Panel SSA for message & file transfer and for service product transfer (Operability, Nav & Tracking)

Includes new IPN protocols such as bundling and any related data transfer application interfaces

Will include interfaces to commodity service providers as needed





Results of Re-Organization (Cont.) Panel SDT (Space Data Transfer)

Deliverables WG A - Upper Layer Protocols & Internet Services

SCPS extensions and sustainment Distribute & support infusion

WG B - S/C Onboard Interfaces, including Message Transfer & Middleware Svcs Draft Red Books for SOIF Data Link and Physical layers Draft red Books for SOIF Network and Transport layers Draft Red Book for Message Transfer Service Develop reference implementation of Message Transfer Service API Internet in Space Application profile

WG C - Product Transfer Svcs (include SLE & CFDP) SLE Transfer Service Blue Books (RAF, RCF, CLTU) Draft CFDP revised Red Book with extended procedures & Store &

Forward Overlay (SFO) Update Reference Implementation to conform to new Red Book Draft Red Book for File and Data Product Management





Results of Re-Organization (Cont.) Panel SSA (Space System Applications)

Content WG A - Operability Standards (to include S/C M&C) WG B - Service Request & Management (include XML) WG C - Tracking & Navigation WG D – Security WG E – Data Archiving Operability Standards will include S/C Monitor and Control as well as

looking at end to end issues like power and thermal management, data management & accountability, distributed system management

Service Request & Management interfaces focus on operational interfaces developed using XML. This will include common data dictionary, glossary, operational interface identification and access mechanisms, and basic standards for operational information exchange.

Tracking and Navigation includes orbital data and ephemeris exchange, gets support from SDT for data transfer and SLC for observables

Security is a cross-cutting concern at all layers of the stack, provides support to other Panels as needed





Results of Re-Organization (Cont.) Panel SSA (Space System Applications)

Deliverables WG A - Operability Standards (to include S/C M&C)

Study on applicability of monitor & control approaches to space WG B - Service Request & Management (include XML)

Draft SLE SM/SR XML specification Draft standard data element & glossary specification using XML Draft standard schema for packaging data in XML for interchange

WG C - Tracking & Navigation Draft Red Book for attitude, environmental models and astrodynamical

constant interchange Blue Book for Trajectory Data interchange, including transfer service

spec WG D – Security

Updated Security Green Book Draft Space Communication System Security Threat Assessment

WG E – Data Archiving

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