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Servicing Mission 4 - Revisited

Ken SembachSTScI Hubble Project Scientist

April 27, 2009

27-Apr-2009 K. Sembach 2Photo Credit: Michael Brown, floridatoday.com (September. 20, 2008)

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27-Apr-2009 K. Sembach 4Photo Credit: NASA (April 17, 2009)

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Photo Credit: NASA / Kim Shiflett (April 18, 2009)

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Payload canister lift, Pad 39A(April 18, 2009)

Photo Credit: NASA / Kim Shiflett (April 18, 2009)

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Rescue Orbiter (Endeavor) grapples SM4 Orbiter (Atlantis)Rescue Orbiter (Endeavor) grapples SM4 Orbiter (Atlantis)

Crew Transfer is via EVACrew Transfer is via EVA• Only SM4 crew goes EVA, not LON crewOnly SM4 crew goes EVA, not LON crew

• Atlantis RMS used if available, but not mandatoryAtlantis RMS used if available, but not mandatory

LON Rescue Mission to SM4 (STS-400)

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LDRI/IDC WLE and Nose Cap Surveys • LDRI prime sensor (No daylight required, sensor has illuminator)• IDC “bonus coverage/best effort imagery ”• If IDC imagery resolution adequate, then it will be used to clear areas of

interest (AOI), thus not requiring dedicated focused inspection.

ITVC Tile Acreage Survey• Replaces Flight Day 3 “RPM Photography” performed on ISS Missions• Totally re-designed contingency tile survey that was originally planned for STS-114

Flight Day 2Flight Day 2SurveysSurveys

LDRI = Laser Dynamic Range ImagerLDRI = Laser Dynamic Range ImagerLCS = Laser Camera SystemLCS = Laser Camera SystemIDC = Digital CameraIDC = Digital CameraITVC = Intensified Television CameraITVC = Intensified Television Camera

Robotic arm extension -Orbiter Boom Sensing System (OBSS) is used.

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Photo Credit: NASA / Cory Huston (April 3, 2009)

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Michael Massimino (Mission Specialist)

Michael Good (Mission Specialist)

Gregory Johnson (Pilot)

Scott Altman (Commander)

Megan McArthur (Mission Specialist)

John Grunsfeld (Mission Specialist)

Andrew Feustel (Mission Specialist)

STS-125 Crew

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Photo Credit: NASA / Kim Shiflett (March 18, 2009)

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27-Apr-2009 K. Sembach 14Photo Credit: NASA / Kim Shiflett (April 2, 2009)

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Hubble Servicing Mission 4

• Replacement Science Instrument Control & Data Handling Unit• Two new science instruments• Wide Field Camera 3 (WFC3) and the Cosmic Origins Spectrograph (COS)

• Replacement of batteries (needed for power during orbital night)• Replacement of gyros (used to determine HST pointing)• Replacement of one of the three Fine Guidance Sensors (FGS)• Repair of the Space Telescope Imaging Spectrograph (STIS)• Repair of the Advanced Camera for Surveys (ACS)• Replacement of thermal blankets (used to maintain temperature)• Installation of Soft Capture Mechanism (SCM)

• NET May 11, 2009 on Space Shuttle Atlantis (STS-125)

Key Elements

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Equipment Bays 5 - 10

Bay 5

Bay 7 Bay 8

Bay5Bay5TransmittersTransmitters

Solid State RecordersSolid State Recorders

Bays 6, 9Bays 6, 9Reaction wheelsReaction wheels

Bay 7Bay 7Various electronicsVarious electronics

Bay 8Bay 8Safing electronicsSafing electronics

Science tape recorderScience tape recorderRetrieval mode gyrosRetrieval mode gyros

Bay 10Bay 10SI C&DHSI C&DH

Data Interface Unit 5Data Interface Unit 5Electronic Control UnitsElectronic Control Units

Bay 6 Bay 9

Bay 10

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• NASA Standard Spacecraft Computer (NSSC-1)• Standard Interface

(STINT)• Memory modules

• Power Control Unit (PCU)

• Control Unit / Science Data Formatter (CU/SDF)

• Remote Interface Unit (RIU)

• Multiplexed Data Bus (MDB)

Science Instrument Control & Data Handling (SI C&DH) Unit on Bay 10 door

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SI C&DH2 Ready for Flight (April 2, 2009)

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Cosmic Origins Spectrograph

Wide Field Camera 3

Fine Guidance Sensor

Rate Sensor Units

Batteries

Flight Support System

Super Lightweight Interchangeable Carrier

Orbital Replacement Unit Carrier

Multi-use Logistic Equipment Carrier

Soft Capture Mechanism

IMAX

HST Servicing Mission 4 (SM4) Configuration

Airlock

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SM4 Configuration (side view)

Carrier origins with respect to Orbiter origin:

SLIC ORUC FSS MULE

Xo = 833.0” Xo = 998.2” Xo = 1075.2” Xo = 1126.33”

Yo = 0.0” Yo = 0.0” Yo = 0.0” Yo = 0.0”

Zo = 414.0” Zo = 414.0” Zo = 300.0” Zo = 300.0”

Orbiter Coordinate System (Xo, Yo, Zo) is orthogonal to all carrier axes.

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STScI Participation During SM4• SMS generation / schedulingSMS generation / scheduling

• Preparation of HST for capture and initiation of activities after releasePreparation of HST for capture and initiation of activities after release

• Last data obtained up to launch + a few hoursLast data obtained up to launch + a few hours

• Aliveness/functional test analysesAliveness/functional test analyses

• Evaluation of test results (telemetry / science data), anomaly resolutionEvaluation of test results (telemetry / science data), anomaly resolution

• Engineering supportEngineering support

• Telemetry monitoring, anomaly resolution, information and data distributionTelemetry monitoring, anomaly resolution, information and data distribution

• Project management support at JSC and GSFCProject management support at JSC and GSFC

• Anomaly resolution, replanningAnomaly resolution, replanning

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We’re Ready For Launch!We’re Ready For Launch!

STS-124 Launch (Discovery) on May 31, 2008

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