Status of SSI ArchitectureGreen Book

Scott Burleigh, JPLLena Braatz, Booz Allen Hamilton

2 November 2011

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Charter

• Develop a CCSDS Green Book to serve as the “SSI Architecture Document” mandated by the “Operations Concept for a Solar System Internetwork (SSI)”.– Interoperability Plenary 1 (IOP-1) established the Interagency

Operations Advisory Group (IOAG) in 1997.– IOAG chartered Space Internetworking Strategy Group (SISG) in 2007.– SISG submitted preliminary SSI Ops Concept to IOP-2 in 2008.– IOP-2 directed IOAG to complete the SSI Ops Concept and create an

SSI Architecture document.– In 2010, IOAG submitted the final SSI Ops Concept and asked CCSDS to

write the SSI Architecture document.

• Complete by fall 2012, in time for IOP-3.

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Guidelines

• Provide further definition of the elements and services identified in the SSI Ops Concept.

• Audience is top-level Agency management.• Should give a clear picture of what is entailed in setting up a

basic space network, and then how to interconnect multiple networks.

• Keep it brief. Additional engineering detail will be provided in the Cross-Support Services Architectural Definition Document.

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Development Process

• Iterative document development, cycling between Scott and Lena.

• First complete draft distributed to review team on 10 October 2011: 64 pages including Annexes.

• Periodic review telecons by Consensus Team:– Gian Paolo Calzolari, Wolfgang Hell, Chris Taylor (ESA)– Chad Edwards, Mike Kearney, Dave Israel (NASA)– Vassilios Tsaoussidis, EU Space Internetworking Center

• First telecon was 11 October 2011.

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Document Structure

• Overview– Transition from simple mission communications model to more

complex topologies including cross-support.– Features of SSI: global support, local control, resource protection.– Using the SSI: earth orbiters, deep space, relay operations.– Provisioning: resources required for SSI operation.

• Stage 1 (basic automation): core functionality• Stage 2 (cross-support): extended functionality• Stage 3 (network automation): advanced functionality• Annexes: definitions of terms and acronyms, formal definition

of Ops Concept ideas

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SAMPLE DIAGRAM FLOW

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Mission information flow

Engineering information flow

SSI automated data communications

Alternative SSI automated data communications

Co-located elements

Administrative responsibility

SSI node

Crew and/or instrument

Spacecraft

Lander

Earth/Planetary Station

User/provider organization (e.g., Earth/Planetary Station Control Center, Spacecraft MOC, Science Operations Center, science data user, etc.)

Legend for network Operation Diagrams

Authority A

Authority B

Authority A

Authority B

Authority B

Authority C