1. STS-125 Hubble Space Telescope(HST) Servicing Mission 4 (SM4) Overview Presented By: Jerry L. Ross October 6, 2009 Prague, Czech Republic 1

2. Wide Field Planetary Camera 2 COSTAR Gyros Solar Arrays Launch! Imaging Spectrograph Near Infrared Camera Fine Guidance Sensor Gyros Advanced Computer Fine Guidance Sensor Advanced Camera Solar Arrays Power Control Unit NICMOS Cooling System Gyros Wide Field Camera 3 Cosmic Origins Spectrograph Batteries Fine Guidance Sensor STIS Repair ACS Repair New Outer Blanket Layer Soft Capture Mechanism SM1 SM2 SM3A SM3B SM4 De-Orbit Mission HUBBLE MISSIONS 1990 1993 1997 1999 2002 2009 NET 2020 2 070108_PMB_SM4_Overview_PAO.ppt 2

3. HST SM4 Flight Crew Scott Altman Greg Johnson Megan McArthur John Grunsfeld Drew Feustel Mike Good Mike Massimino 3

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5. STS-400 is being prepared as the rescue mission for STS-125. It will be processed in parallel with STS-125 and will be available for launch if needed HST Launch on Need (LON) Rescue Mission STS-400 5

6. Flight Support System Super Lightweight Interchangeable Carrier Orbital Replacement Unit Carrier Multi-use Logistic Equipment Carrier HST Servicing Mission 4 (SM4) Configuration 6

7. SI C&DH (Bay 10) SI C&DH 7

8. WFC3 will be the first Hubble wide-field camera spanning Ultraviolet – Visible - Infrared 8

9. Battery Bays (2 & 3) Bays 2 and 3 Bays 2 Bays 3 9

10. Battery Details 10

11. Rate Sensor Unit (RSU) HST Rate Gyro Assembly (RGA) Rate Sensor Unit and Electronic Control Unit

12. COS will be the most sensitive UV spectrograph ever to fly on Hubble 12

13. ACS Worksite CCD Electronics Box (CEB) Radiators 13

14. ACS Worksite/Tools View from bottom of ACS looking up Cover Plate (32 Non-Captive Fasteners) Grid – To Be Cut 14

15. Grid Cutter 15

16. Fastener Capture Plate 16

17. Card Removal from ACS Card Extraction Tool 17

18. CEB Replacement Module Power Supply Module Power Connectors ACS Repair 18

19. L-Handle EVA Handle MEB Cover LVPS-2 Card (Internal) STIS Cover Clamp Fastener Capture Plate The Fastener Capture Plate is attached to the STIS MEB cover and is used to capture the 111 screws that EVA astronauts will remove in order to gain access to the failed LVPS-2 power supply card 19

20. Low Voltage Power Supply (LVPS) Card 20

21. STIS Card Removal 21

22. FGS R&R Access to HST Access to FSIPE 22

23. Soft Capture Mechanism SCM attached to HST EM Soft Capture Mechanism (SCM) Fitcheck with Lightweight Berthing and Positioning System (BAPS) ring The Soft Capture Mechanism will be attached to the aft bulkhead of Hubble during SM4. It greatly increases the likelihood of a successful autonomous rendezvous and capture. It is a risk reduction opportunity for a future de-orbit mission 23

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