1 JWST Functional Flow Diagrams and Schematic Block Diagrams
Dec 14, 2015
1
JWST Functional Flow Diagramsand Schematic Block Diagrams
2
JWST Operational Phases and System Functional Breakdown
Pre-Launch Phase
Approval to ship to the Launch Site
Final Count Down Start
Launch PhaseDeployment & TrajectoryCorrection Phase
Cruise & CommissioningPhase
ObservatorySep from LV
Primary & SecondaryMirror Deployment
Normal Science Operations Phase
Observatory Commissioned
3
JWST Phases and System Functional Breakdown
Pre-Launch Phase
Approval to ship to the Launch Site
Final Count Down Start
Launch PhaseDeployment & TrajectoryCorrection Phase
Cruise & CommissioningPhase
ObservatorySep from LV
Primary & SecondaryMirror Deployment
Normal Science Operations Phase
Observatory Commissioned
Perform Fault Detection and Correction
Generate and Distribute Power
Maintain Observatory Temperatures
Protect Observatory Components from Environments
Collect, Process & Store Engineering Data Downlink Engineering Data Evaluate and Trend Engineering Data
Plan Engineering Activities Uplink Commands Process, Store & Distribute Commands
Determine Orbit&
4
JWST Phases and System Functional Breakdown
Pre-Launch Phase
Approval to ship to the Launch Site
Final Count Down Start
Launch PhaseDeployment & TrajectoryCorrection Phase
Cruise & CommissioningPhase
ObservatorySep from LV
Primary & SecondaryMirror Deployment
Normal Science Operations Phase
Observatory Commissioned
Perform Fault Detection and Correction
Manage Observatory Momentum
Point the Observatory
Generate and Distribute Power
Maintain Observatory Temperatures
Protect Observatory Components from Environments
&
Collect, Process & Store Engineering Data Downlink Engineering Data Evaluate and Trend Engineering Data
Plan Engineering Activities Uplink Commands Process, Store & Distribute Commands
Determine Orbit
Separate from LV
Deploy SA andAcquire SunNull Rates Deploy
HGADeploy Aft& Forward Sunshield
Deploy OTETower
DeploySunshield
DeploySMSS
DeployPM Wings
PerformMCC1
5
JWST Phases and System Functional Breakdown
Pre-Launch Phase
Approval to ship to the Launch Site
Final Count Down Start
Launch PhaseDeployment & TrajectoryCorrection Phase
Cruise & CommissioningPhase
ObservatorySep from LV
Primary & SecondaryMirror Deployment
Normal Science Operations Phase
Observatory Commissioned
Perform Fault Detection and Correction
Manage Observatory Momentum
Point the Observatory
Generate and Distribute Power
Maintain Observatory Temperatures
Protect Observatory Components from Environments
&
Collect, Process & Store Engineering Data Downlink Engineering Data Evaluate and Trend Engineering Data
Plan Engineering Activities Uplink Commands Process, Store & Distribute Commands
Determine Orbit Perform MCC2 Perform MCC2 Perform L2 Orbit Insertion
OTE WF Alignment and Phasing ISIM and SI Initialization and Calibration
Acquire Targets
Manage Vibration
Maintain Fine Pointing Small / Medium Angle Maneuver&
6
JWST Phases and System Functional Breakdown
Pre-Launch Phase
Approval to ship to the Launch Site
Final Count Down Start
Launch PhaseDeployment & TrajectoryCorrection Phase
Cruise & CommissioningPhase
ObservatorySep from LV
Primary & SecondaryMirror Deployment
Normal Science Operations Phase
Observatory Commissioned
Perform Fault Detection and Correction
Manage Observatory Momentum
Slew the Observatory
Generate and Distribute Power
Maintain Observatory Temperatures
Protect Observatory Components from Environments
&
Collect, Process & Store Engineering Data Downlink Engineering Data Evaluate and Trend Engineering Data
Plan Engineering Activities Uplink Commands Process, Store & Distribute Commands
Determine Orbit Perform Orbit Maintenance
Perform WFSC
Plan Science Operations
Perform Science Observations
Perform SI CalibrationsUplink Observation Plan
Process/ Store ScienceData
DownlinkScienceData
GroundProcessScienceData
GenerateObservation Plan Cmds
&
Acquire Targets
Manage Vibration
Maintain Fine Pointing Small / Medium Angle Maneuver&
7
JPLDeep Space
Network(DSN)
JWST Communications System Architecture
GSFCFlight
DynamicsFacility (FDF)
STScI Science & Operations Center (S&OC)
FlightOperationsSubsystem
(FOS)
DataManagementSubsystem
(DMS)
WavefrontSensing &
Control Exec(WFSC Exec)
ProposalPlanning
Subsystem(PPS)
OperationsScript
Subsystem(OSS)
ProjectReference DB
Subsystem(PRDS)
ObservatorySimulators(OTB/STS)
Madrid
NA
SA
Inte
gra
ted
Ser
vice
s N
etw
ork
(N
ISN
)
L2 Point
Launch Segment
Observatory Segment
L2 Transfer Trajectory
Ground Segment
Goldstone Canberra
L2 Lissajous Orbit The launch vehicle injects observatory into an L2 transfer
trajectory
The observatory operates at L2 point for 5 years with a goal of 10 years, providing imagery and spectroscopy in the Near and Mid Infrared wavebands.
The Ground Segment receives downloads of science data and sends command uploads during daily 4 hour contacts
Ground Segment uploads plans to the Observatory ~once a week and the observatory autonomously executes these plans
NASA ProvidedCommunicationAsset for Early
Orbit Phase
8
Observatory Schematic Block Diagram
ISIM COMMC&DH
Omni
HGA
MIRI FPE
Ka-Band Modulator
( x2)
Ka-Band TWTA (x 2)
Switches
OTE
EPS
ACS
Reaction Wheels
(x 6)
Propulsion (Bi-Prop )
SecondaryCombustionAugmented
Thrusters(x 4)
MRE -4 STMs(x 8)
Region 1 Region 2 Region 3
Legends :
ISIM 1553 B-I
Spacewire Discrete -pt to pt
Region 1-(within Si /OA ) Region 2-(within IEC )Region 3-(within spacecraft
bus)
WingDeployment Acts
(x 2) &Latch Acts (x8)
Primary Mirror
Secondary Mirror
Tertiary Mirror
photons
Hexapod(6 DOF)
Hexapod(7 DOF )
x18
Primary Power
Fine Sun Sensors (x2)
Wheel Drive Electronics (x6)
Command Telemetry Processor
NIRSpec
FGS
NIRCam
Sunshield
40 Ah NiH 2
Battery
Coarse Sun Sensors (x4)
Valve Drive Electronics (x 2)
Inertial Reference Unit (1)Tower
Actuators
SMSS Deploy
ActActuator
Drive Unit
SunshieldAct (x6)
RS422
Cold Junction
Box
Solid State Recoder
S/C-ISIM 1553 B-SI
Solar Array
Regulators (x2)
Solar Array (3 panels )
(x2)
S/ C 1553 B-S
Telemetry Acquisition
Unit
M otor Switching Relay
Region 3
Analog /Bilevel
Compressor Assembly
Cooling Lines
Radiator Heat
Switches
Contn Ctrl Htrs
Cryo Tem p
Sensors
MIRI
FGS Guiders FPE /ICE
FGS TF FPE /ICE /TCE
CCE -JT(x2)
CCE -PC(x2)
ISIM Command
& Data Handling
(x2)
IRSU
NIRSpec FPE /ICE /MCE
Star Trackers ( x3)
Solar
ArrayAct (x2)
High Gain Antenna Act (x2)
Mechanical I /F
DIT CE ( x2)
FSM Act
LVDS
Power
Control Unit
S-Band Transponder (x2)
Orientation Drive Electronics with Resolver (x2)
NIRCam FPEs /ICE
MIRI FPE /ICE
9
JWST Phases and System Functional Breakdown
Pre-Launch Phase
Approval to ship to the Launch Site
Final Count Down Start
Launch PhaseDeployment & TrajectoryCorrection Phase
Cruise & CommissioningPhase
ObservatorySep from LV
Primary & SecondaryMirror Deployment
Normal Science Operations Phase
Observatory Commissioned
Perform Fault Detection and Correction
Manage Observatory Momentum
Point the Observatory
Generate and Distribute Power
Maintain Observatory Temperatures
Protect Observatory Components from Environments
And
Collect, Process & Store Engineering Data Downlink Engineering Data Evaluate and Trend Engineering Data
Plan Engineering Activities Uplink Commands Process, Store & Distribute Commands
Determine Orbit Perform Orbit Maintenance