"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review1 WIDE FIELD CAMERA 3 HOME PAGE: wfc3.gsfc.nasa.govwfc3.gsfc.nasa.gov TIPS – June 27, 2002 IR Filter Wheel UVIS Surrogate Detector Flight SOFA

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review2 STScI work –Mini-Handbook completed (M. Giavalisco, ed.) and in SOC review/comment phase –Ground system development on schedule –UVIS and IR test images received last week from Ball Good implications for test benches/simulators/FSW Key element for maintaining STScI work flow Close to starting timing tests on benches for ops software –Ongoing analysis and calibration Stiavelli and Hartig ready to support encircled energy test Robberto et al supporting detector characterization Reid/Bartko/Kutina -- science ground cal plan Lupie working filter issues STScI Highlights

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review3 Optics bench buildup at Ball on schedule for late August shipment to GSFC –IR/UVIS corrector mech and UVIS surrogate detector –SOFA received from Moog (flight qual complete) –IR surrogate ready for bench (IR qual has vacuum) GSFC preparations –Enclosure buildup and testing on track –Stimulus assembled and getting ready for Therm Vac –VCHP thermal vac complete Schedule metric value for May is 44% against the SM4 launch date of March 1, 2004 Instrument Assembly Highlights

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review4 Instrument Level I&T Flow at GSFC Jamie Dunn Start Elec Integ. on Flt Enclosure Crew Familiarizations Deliver to HST Optical Assy Integration Match Mate Fit Check Performance Test Integrate Flight Detectors Complete Elec Integration Metrology & WSIPE fit check Acoustic Test Magnetic SurveyEMI / EMC Test Mass Properties TB / TV and Calibration Ship to KSC WFC3 SMGT HFMS Fit Check Launch Integrated SMGT

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review5 Optical Assembly Integration Progress Mark Bergeland Deliver OA to GSFC UVM2 IR Fold Mirror Optical Bench in WFAS Selectable Optical Filter Assembly (EMU) Alignment Cubes Chief Ray Target Plate UVM1 UVIS Corrector Mechanism IRM1 Pickoff Mirror UVIS Detector Assy Surrogate SEP ‘ OCT ‘ NOV ‘ DEC ‘ JAN ‘ FEB ‘02 MAR ‘ APR ‘02 MAY ‘ JUN ‘02 JUL ‘ AUG ‘02 SEP ‘ IR Detector Assembly Surrogate Calibration Subsystem IR Corrector Mechanism IRM2 Mini-Stimulus Alignment in WFAS Channel Select Mech (CSM) UVIS Shutter Assembly Optical Baffles and UVIS Post-Flash Flight SOFA IR Cold Enclosure Assembly Refractive Corrector Plate (RCP) Cold Enclosure IR Filter Wheel

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review6 IR Filter Wheel Populated Blank F160W F125W G141 F110W F105W F098W G102 F093M F153M F139M F127M F128N F130N F132N F126N F167N F164N

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review7 Detectors Continue To Progress Well Through Assembly Flight UVIS-1 Flight UVIS-2 – Completed base disc assembly – Sealed base disc assembly to external ring assembly – Began base disc assembly

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review8 IR Detector Hardware Qual assy after vacuum acquisition and pinchoff Surrogate assy integration is nearly complete

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review9 IRM2 Alignment Fixture and Bench Installation View From IR Detector Mechanism Side View Alignment Fixture Reticle Mirror Alignment Fixture Z Reference Tooling Ball Corrector Mechanism

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review10 Completed VCHP Performance Thermal Vacuum Test Optical Bench Cold Plate VCHP/CCHP Interface VCHP and Reservoir Main Radiator Simulator

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review11 CASTLE TELESCOPE RIAF OFF-LOAD FIXTURE ISOLATION CRADLE ELECTRICAL CABLES CASTLE Integrated to the RIAF POINT TARGET ASSEMBLY CATHETOMETER STEERING MIRROR ASSEMBLY BALANCE WEIGHTS

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review12 Electronics Boxes behind –Parts shortages being worked; GSFC assuming some IR detector performance –HST Project has agreed to Lot 7 at Rockwell –Installing IR#32 (low QE part into Build 1) TECFIRE –Redesign complete with review on 1 July –Uses 18 (originally 3) TECs with conductive felt (GELVET) Possible problem with pinholes in UV filters –Being assessed but may require in-situ painting Problem Areas

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review13 GSFC and Ball Are Splitting The Remaining Electronics Effort Bob Parizek HST Power Command/ Housekeeping RIU LVPS Control Section Support Electronics Section UVIS CEB IR DEB Housekeeping Data (Thermistors) Calibration Lamp Controller Optical Assy CSM Correctors (2) IR Filter Wheel UVIS Shutter SOFA Cal Lamps Science Data Formatter Thermal Controllers (4) & Radiator TEC 1. Only one side shown 2. Cross-strapping not shown 3. Not shown: - RIU Expander Unit - Heater Power Distribution Box UVIS Detector IR Detector Filter Box MEB = redundant boxes = redundant circuitry on the PWAs SOFA Relay Responsibility color code: GFE GSFC Builds/Tests Ball DesignBall Delivers Functional Unit Ball Delivers Tested Unit

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review14 IR Detector Status In May, IPT and SOC believed that Lot 6 parts were acceptable –QE problem solved but noise still high –Subsequent DCL testing shows very poor stability over many hours Ball overheated IR FPA#50 (50C limit; reached ~75C) –Science IPT and SOC selected FPA #32 is the best device for IR Build 1, due to the uncertainty in our ability to calibrate a device like FPA #50 We have 3 other Lot 6 parts (only 1 other part similar to #32) –A second full process review at Ball week of July 8 or 15 IR FPA Lot 7 starting at Rockwell Scientific –Well understood why Lot 6 QE much improved –Good reason advanced why #32&#34 have much better stability –These involve separate process steps physically well separated in detector –Expect delivery to DCL in October and to Ball in early January Has schedule implications for thermal vac and ground calibration

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review15 IR Detector QE

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review16 TECFIRE Cornelis de Kramer Original (Soldered) New (Solderless)

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review17 Original Design With Solder Interfaces To TECs TECs Radiator Heat Pipes Soldered Interfaces

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review18 Non-Loaded TEC Configuration With GELVET  TEC Housing w/ Flexures (titanium) Bevel Washers (8x) Interface to Flex Pipe (Aluminum) Interface to Radiator HP (Aluminum or Copper?) IR Detector Flex HP Condenser Saddle Spreader/U HP

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review19 Dual substrate filter with gap – UVIS 15(F300X). Pinholes were found by Barr in UVIS 1,2,and 15 and ‘painted’ over. Single substrate filter – UVIS 03 (F275W), Pinholes found before and after installation in filter wheel and thermal vacuum cycles at Moog. Thin Aluminum coating Thin Aluminum type coatings used in some UV filters are highly susceptible to pinholes UVIS-UV Filter Construction

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review20 UV Filters Transmission Curve UVIS 03 (F275W) UVIS 15 (F300X)

"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure." 25 June, 2002WFC3 Monthly Status Review21 Pinhole Assessment Ongoing