24-Jun-2008K. Sembach 1 What’s Happening During Hubble Servicing Mission 4? Ken Sembach STScI Hubble Project Scientist.

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Presentation transcript:

24-Jun-2008K. Sembach 1 What’s Happening During Hubble Servicing Mission 4? Ken Sembach STScI Hubble Project Scientist

24-Jun-2008K. Sembach 2 Hubble Has Improved Over Time Servicing missions have improved Hubble’s vision… Hubble sees farther and with greater clarity than any ground-based optical telescope Hubble will be even more powerful after SM4. WFPC1WFPC2

24-Jun-2008K. Sembach 3 Hubble Servicing Mission 4 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) Scheduled for October 8, 2008 on Space Shuttle Atlantis (STS-125) Key Elements

24-Jun-2008K. Sembach 4 New Hubble Science Instruments Wide Field Camera 3 (Panchromatic Imaging) Two channels cover near-ultraviolet to near-infrared wavelengths Wide field imaging from 200 to 1700 nm Greater sensitivity, wider field of view Replaces WFPC2 during SM4 Cosmic Origins Spectrograph (Ultraviolet Spectroscopy) Far-ultraviolet channel (110 nm nm) Improves HST sensitivity by at least 10x Near-ultraviolet channel (180 nm nm) Replaces COSTAR during SM4

24-Jun-2008K. Sembach 5 End-to-end measurements demonstrate the dramatic near-ultraviolet and near-infrared advantages of WFC3 over other instruments WFC3: The Next Step in HST Imagers May 2008

24-Jun-2008K. Sembach 6 WFC3 Configuration B-Latch

24-Jun-2008K. Sembach 7 WFC3 Science Themes What are dark energy and dark matter? How and when did galaxies first assemble? How universal are the processes of star formation in galaxies? How do stars evolve, and what is their distribution of masses? How does star-formation and planetary disk formation depend on environmental conditions? What is the composition of planets, comets, and minor planets in our Solar System (and beyond)?

24-Jun-2008K. Sembach 8 WFC3 Panchromatic Imaging of Star-Forming Regions Ultraviolet observations reveal young stars that are flooding their surroundings with intense ultraviolet light. Infrared observations penetrate deeper into regions heavily obscured by dust.

24-Jun-2008K. Sembach 9 COS Bench and Optical Layout Main Electronics Box Remote Interface Unit FUV Detector Electronics Box Aperture Mechanism Optics Select Mechanism–1 Optics Select Mechanism–2 FUV Detector A Cal Platform NUV Detector A FUV MCP Detector NUV MAMA Detector Calibration Platform OSM-1 OSM-2 NUV Collimator NUV Camera Mirrors (3) Aperture Mechanism

24-Jun-2008K. Sembach 10 COS Science Themes What is the large-scale structure of matter in the Universe? How did galaxies form out of the intergalactic medium? What types of galactic halos and outflowing winds do star-forming galaxies produce? How were the chemical elements for life created in massive stars and supernovae? How do stars and planetary systems form from dust grains in molecular clouds? What is the composition of planetary atmospheres and comets in our Solar System (and beyond)?

COS Spectroscopy of the Cosmic Web COS will greatly increase the number of quasar sight lines explored by Hubble. Cosmic web absorption features In just a few days, COS can sample as much of the Universe as all existing STIS observations of quasars have probed!

24-Jun-2008K. Sembach 12 COS Will Explore Galactic Outflows Galaxies power strong winds that blow dust, gas, and heavy elements into the intergalactic medium. Credit: X-ray: NASA / CXC / JHU / D.Strickland; Optical: NASA / ESA / STScI / AURA / The Hubble Heritage Team; IR: NASA / JPL-Caltech / Univ. of AZ /C. Engelbracht M82

24-Jun-2008K. Sembach 13 EVA Timeline STS-125 Crew Megan McArthur (Mission Specialist) Michael Good (Mission Specialist) Gregory Johnson (Pilot) Scott Altman (Commander) John Grunsfeld (Mission Specialist) Michael Massimino (Mission Specialist) Andrew Feustel (Mission Specialist)

24-Jun-2008K. Sembach 14 Radial Bay Instrument Replacement The new Wide Field Camera 3 (WFC3) will replace the existing Wide Field Planetary Camera 2 (WFPC2). WFPC1 removal during SM1 (December 1993)

24-Jun-2008K. Sembach 15 Axial Bay Instrument Replacement Faint Object Camera removal during SM3B (Bay 3, -V2: Currently contains ACS) COSTAR installation during SM1 (Bay 4, -V2)

24-Jun-2008K. Sembach 16

24-Jun-2008K. Sembach 17 Battery Replacement 2 NiH 2 Battery Modules 3 batteries per module 22 cells per battery Batteries now on Hubble are originals Original BMA installed in HST Bay 2 ( second BMA is in Bay 3 ) BMA (SN 1033) (with lid removed) Battery Isolation Switch

24-Jun-2008K. Sembach 18 New Outer Blanket Layers (NOBLs) Multi-layer insulation (MLI) protects Hubble Multi-layer insulation (MLI) protects Hubble Thermal control of critical Equipment Bays Thermal control of critical Equipment Bays Degrading from environmental exposure Degrading from environmental exposure NOBLs NOBLs Stainless steel panels with MLI Stainless steel panels with MLI NOBLs already installed on Bays 1, 6, 9, and 10 NOBLs already installed on Bays 1, 6, 9, and 10 NOBLs 8, 5, and 7 (#8 currently on EVA day 4) NOBLs 8, 5, and 7 (#8 currently on EVA day 4) +V3 Light Shield and SM2 installed patches Bay 6, before and after NOBL installation SM1SM2SM3B

24-Jun-2008K. Sembach 19 NOBLs for Equipment Bays 5, 7, and 8 Bay 5 Bay 7Bay 8 Bay5Transmitters Solid State Recorders Bay 7 Various electronics Bay 8 Safing electonics Science tape recorder Retrieval mode gyros

24-Jun-2008K. Sembach 20

24-Jun-2008K. Sembach 21 STIS Instrument Repair Remove EVA handle Install fastener capture plate 107 fasteners! Remove Main Electronics Box (MEB) cover Extract faulty card Insert replacement card Install MEB replacement cover MEB-1 Cover EVA Handle LVPS-2 MEB1 with cover removed

24-Jun-2008K. Sembach 22 STIS Repair Tools and Replacement Cover Fastener Capture Plate (FCP) captures bolts/washers Card-lok Manipulation Tool (CMT) releases card Card Extraction/Insertion Tool (CEIT) Card Transport Enclosure (CTE) MEB Replacement Cover No bolts necessary! CMT CEIT CTE Replacement Cover FCP

24-Jun-2008K. Sembach 23 ACS Instrument Repair CCD Electronics Box (CEB) access Cut EMI screen 32 fasteners Remove cover Extract 4 cards MEB1 / LVPS2 Inside Possible ESM Interference For Panel Removal WFC CEB Inside ESM ACS Mockup HRC CEB Inside Power Connector

24-Jun-2008K. Sembach 24 ACS FCP and Screen Cutter Fastener Capture Plate (FCP) EMI Screen Cutter

24-Jun-2008K. Sembach 25 ACS Instrument Repair Install CEB-R and LVPS-R New WFC CEB-R HRC CEB (unaltered) New LVPS-R Power Output Element (POE) Power Input Element (PIE) ACS input power socket Connection to HST power

24-Jun-2008K. Sembach 26 It takes thousands of people across this country to make a Hubble Servicing Mission successful!