4.4.9 - Telemetry Tracking & Command Subsystem (TT&C)

4.4.9-6 Level 2 Tasks

Tasks Applicable Mission Phases Description SFWC Artifacts References
4.4.9-6-1 Ensure reliability engineering analyses demonstrate that design life and mean mission duration requirements are satisfied Phase B | Phase C | Phase D1 | Ensure worst-case analyses, component stress levels, failure mode and effects critical analysis and reliability analyses support mission life. Ensure independent risk assessment performed of all identified single point failures. Evaluate electrical and mechanical worst case design for boxes/components. Ensure preliminary results reported at Preliminary Design Review, and updated/final results reported at Critical Design Review. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.9-6-2 Ensure subsystem specific analyses demonstrate that design requirements are satisfied Phase B | Phase C | Phase D1 | Examine analysis results and methodologies of thermal, coupled loads, link, radiation, slosh, software throughput, etc. as applicable. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.9-6-3 Ensure independent modeling and simulation applicable to the subsystem design are performed Phase A | Phase B | Phase C | Phase D1 | Ensure areas of design and/or operational risk in the subsystem are identified which would benefit from an independent analysis or simulations to validate contractor predictions and tradeoffs. Examples are circuit analysis, thermal, coupled loads analysis. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.9-6-4 Ensure review of thermal vacuum or thermal balance test data (model) for component temperatures Phase B | Phase C | Phase D1 | Provide summary of, and detailed report (for PDR, present what has been completed, or indicate a due date when the item will be completed). NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
4.4.9-6-5 Ensure digital data bus loading analysis is adequate and complete Phase B | Phase C | Ensure the use of STD 1553 (or similar). NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.9-6-6 Ensure electrical interface analyses for all interfaces are adequate and complete Phase B | Phase C | Phase D1 | Ensure power subsystem user specifications are flowed down to all active T&C unit specifications. NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.9-6-7 Ensure radiation analyses for units are adequate and complete Phase B | Phase C | Phase D1 | NA NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.9-6-8 Ensure Single Event Upset analysis is adequate and complete Phase B | Phase C | Phase D1 | NA NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.9-6-9 Ensure timing analyses for all up-link rates are adequate and complete Phase B | Phase C | Phase D1 | NA NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2, Testing of SV TT&C chapter
4.4.9-6-10 Ensure analysis to show adequate digital data bus (DDB) margins for commands and FM housekeeping functions is adequate and complete Phase B | Phase C | Phase D1 | NA NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.9-6-11 Ensure analysis to show adequate margin in number of command and telemetry ports available is adequate and complete Phase B | Phase C | NA NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.9-6-12 Ensure analysis to show adequate telemetry bandwidth margin is adequate and complete Phase A | Phase B | Phase C | Phase D1 | Ensure bandwidth and telemetry links contain sufficient margin. NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.9-6-13 Ensure range error drift, carrier, sub-carrier stability analyses are adequate and complete Phase B | Phase C | Phase D1 | NA NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2