JWST Functional Flow Diagrams and Schematic Block Diagrams

JWST Functional Flow Diagrams and Schematic Block Diagrams 1

JWST Operational Phases and System Functional Breakdown Approval to ship to the Launch Site Final Count Down Start Pre-Launch Phase Observatory Sep from LV Launch Phase Primary & Secondary Mirror Deployment & Trajectory Correction Phase Observatory Commissioned Cruise & Commissioning Phase Normal Science Operations Phase 2

JWST Phases and System Functional Breakdown Approval to ship to the Launch Site Final Count Down Start Pre-Launch Phase Observatory Sep from LV Launch Phase Primary & Secondary Mirror Deployment & Trajectory Correction Phase Observatory Commissioned Cruise & Commissioning Phase Normal Science Operations Phase Perform Fault Detection and Correction Collect, Process & Store Engineering Data Downlink Engineering Data. Evaluate and Trend Engineering Data Plan Engineering Activities Uplink Commands & Process, Store & Distribute Commands Determine Orbit Generate and Distribute Power Maintain Observatory Temperatures Protect Observatory Components from Environments 3

JWST Phases and System Functional Breakdown Approval to ship to the Launch Site Final Count Down Start Pre-Launch Phase Separate from LV Null Rates Observatory Sep from LV Deployment & Trajectory Correction Phase Launch Phase Deploy SA and Acquire Sun Primary & Secondary Mirror Deployment Observatory Commissioned Cruise & Commissioning Phase Normal Science Operations Phase Deploy HGA Perform MCC 1 Determine Orbit Deploy Aft & Forward Sunshield Deploy OTE Tower Deploy Sunshield Deploy SMSS Deploy PM Wings Perform Fault Detection and Correction Collect, Process & Store Engineering Data Downlink Engineering Data. Evaluate and Trend Engineering Data Plan Engineering Activities Uplink Commands & Process, Store & Distribute Commands Manage Observatory Momentum Point the Observatory Generate and Distribute Power Maintain Observatory Temperatures Protect Observatory Components from Environments 4

JWST Phases and System Functional Breakdown Approval to ship to the Launch Site Final Count Down Start Pre-Launch Phase Observatory Sep from LV Primary & Secondary Mirror Deployment & Trajectory Correction Phase Launch Phase Observatory Commissioned Cruise & Commissioning Phase Normal Science Operations Phase OTE WF Alignment and Phasing. ISIM and SI Initialization and Calibration Determine Orbit Perform MCC 2 Perform L 2 Orbit Insertion Perform Fault Detection and Correction Collect, Process & Store Engineering Data Downlink Engineering Data. Evaluate and Trend Engineering Data Plan Engineering Activities Uplink Commands & Process, Store & Distribute Commands Manage Observatory Momentum Acquire Targets Point the Observatory Maintain Fine Pointing Small / Medium Angle Maneuver & Manage Vibration Generate and Distribute Power Maintain Observatory Temperatures Protect Observatory Components from Environments 5

JWST Phases and System Functional Breakdown Approval to ship to the Launch Site Final Count Down Start Pre-Launch Phase Observatory Sep from LV Primary & Secondary Mirror Deployment & Trajectory Correction Phase Launch Phase Cruise & Commissioning Phase Perform Science Observations Plan Science Operations Uplink Observation Plan Generate Observation Plan Cmds & Perform SI Calibrations Perform WFSC Determine Orbit Observatory Commissioned Process / Store Science Data Normal Science Operations Phase Downlink Science Data Ground Process Science Data Perform Orbit Maintenance Perform Fault Detection and Correction Collect, Process & Store Engineering Data Downlink Engineering Data. Evaluate and Trend Engineering Data Plan Engineering Activities Uplink Commands & Process, Store & Distribute Commands Manage Observatory Momentum Acquire Targets Slew the Observatory Maintain Fine Pointing Small / Medium Angle Maneuver & Manage Vibration Generate and Distribute Power Maintain Observatory Temperatures Protect Observatory Components from Environments 6

JWST Communications System Architecture L 2 Lissajous Orbit Observatory Segment L 2 Point l The launch vehicle injects observatory into an L 2 transfer trajectory l The observatory operates at L 2 point for 5 years with a goal of 10 years, providing imagery and spectroscopy in the Near and Mid Infrared wavebands. l The Ground Segment receives downloads of science data and sends command uploads during daily 4 hour contacts l Ground Segment uploads plans to the Observatory ~once a week and the observatory autonomously executes these plans L 2 Transfer Trajectory Madrid Goldstone. Canberra JPL Deep Space Network (DSN) Launch Segment NASA Integrated Services Network (NISN) NASA Provided Communication Asset for Early Orbit Phase STSc. I Science & Operations Center (S&OC) Ground Segment Observatory Simulators (OTB/STS) Flight Operations Subsystem (FOS) GSFC Flight Dynamics Facility (FDF) Data Management Subsystem (DMS) Operations Script Subsystem (OSS) Project Reference DB Subsystem (PRDS) Wavefront Sensing & Control Exec (WFSC Exec) Proposal Planning Subsystem (PPS) 7

Observatory Schematic Block Diagram 8

JWST Phases and System Functional Breakdown Approval to ship to the Launch Site Final Count Down Start Pre-Launch Phase Observatory Sep from LV Launch Phase Primary & Secondary Mirror Deployment & Trajectory Correction Phase Observatory Commissioned Cruise & Commissioning Phase Normal Science Operations Phase Perform Fault Detection and Correction Collect, Process & Store Engineering Data Downlink Engineering Data. Evaluate and Trend Engineering Data Plan Engineering Activities Uplink Commands Process, Store & Distribute Commands Manage Observatory Momentum And Point the Observatory Determine Orbit Perform Orbit Maintenance Generate and Distribute Power Maintain Observatory Temperatures Protect Observatory Components from Environments 9