Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/institute/stuc/oct06-presentations/WFC3.pdf Дата изменения: Wed Apr 18 00:53:04 2007 Дата индексирования: Sat Dec 22 17:15:54 2007 Кодировка: Поисковые слова: http astrokuban.info astrokuban

WFC3 Status
· Instrument re-integration underway
­ Electronics mostly completed box level testing (MEB2 open issue)
· All four Interpoint converter upgraded in LVPS

­ Filter issues all resolved
· · · · UVIS ghosts fixed and SOFA at GSFC in acceptance testing F588N replaced with F200LP (filter glass chipping issue) IR Grisms rebuilt and installed (rotation and focus problem fixed) F093W replaced with F140W in IR channel

­ SMGT scheduled for February 2007 ­ Thermal vacuum test #2 starting in early March (old IR detector) ­ Thermal vacuum test #3 late summer (new IR detector)

· WFC3 SOC met at STScI October 12-13 · New version of "mini-Handbook" released
January 18/19, 2006 Wide Field Camera 3 Monthly Status Review 1

IR Detector Status
· IR2 (FPA 64, substrate on ­ proton glow risk)
­ Successfully completed acceptance testing, thermal vacuum characterization and alignment verification ­ Currently at GSFC awaiting integration for instrument-level TVac-2

· IR1 (FPA 129, substrate removed, new BCS)
­ Encountered an electrical open on pre-amp board during build ­ Recovery plan likely to succeed but some noise risk ­ Performance significantly exceeds FPA 64 prior to glow issue

· IR3 (enclosure parts nearly complete)
­ Late November selection of FPA ­ FPA 148 from Teledyne Imaging Sensors (formerly Rockwell Scientific)
· First promising part from "SR Lot 4" · E x p e c t 5 -7 a d d itio n a l p a rts to c h o o s e fro m b y m id N o v e m b e r

­ Earlier SR parts have significant liens (2 appear flyable)

January 18/19, 2006

Wide Field Camera 3 Monthly Status Review

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Calibration Plans
· Steps towards calibration of WFC3
­ ­ ­ ­ Component calibrations of filters (extensive and documented effort) Thermal vacuum calibration Servicing Mission Orbital Verification (SMOV) Cycle 17 Calibration

· System Level Thermal Vacuum Testing
­ TV#2 calibrates UVIS channel and validates SI overall ­ TV#3 calibration IR channel plus contingency ­ New calibrations based on ACS and NICMOS experience
· IR b ia s v s . in s tru m e n t b u s v o lta g e

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Deep survey mode UVIS and IR biases and darks

SLTV#2
UVIS IR Totals
January 18/19, 2006

SMS's
80 61 141

Reviewed Revised/Ready
61 41 102 49 41 90

Delivered
27 18 45

Built

Wide Field Camera 3 Monthly Status Review

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UVIS SLTV Procedures
Proc
VE00 UV01 UV02 UV03 UV04 UV05 UV06 UV07 UV08 UV11 UV12 UV14 UV15

Description
OS Verification Darks CTE Gain Linearity (pt src) Linearity (full frame) Charge Injection Subarray Darks/Bias Shutter Performance Encircled Energy Image Stability Filter Throughput (Wide, Med) System Throughput

Proc Proc
UV16 UV17 UV19 UV20 UV21 UV22 UV23 UV24 UV25 UV26 UV27 UV28 UV31

Description Descrip
Detector Cutoff Filter Throughput (Narrow) Filter Red Leaks Filter Flats (external) Grism Flats Fringing Filter Flats (internal cal sys) Grism Dispersion Ghosts Chip Gap Behavior Light Leaks Science Monitor Electronic Crosstalk
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January 18/19, 2006

Wide Field Camera 3 Monthly Status Review

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IR SLTV Procedures
Proc
VE00 IR01 IR02 IR03 IR04 IR05 IR08 IR11 IR12 IR13 IR14 IR15 IR16

Description
OS Verification Darks & Thermal Background Gain Linearity (pt src) Linearity (full field) Subarray Darks Encircled Energy Filter Throughput Detector Cutoff Filter Flats (external) Grism Flats Filter Flats (internal cal sys) Grism Dispersions

Proc
IR17 IR18 IR19 IR21 IR22 IR23

Description
Ghosts & Scattered Light Light Leaks Science Monitor Readnoise vs. Gain Subarray Photometry Electronic Crosstalk

January 18/19, 2006

Wide Field Camera 3 Monthly Status Review

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On-Orbit Calibration
· SMOV Requirements Review conducted Fall 2003
­ Delta review schedule for Dec 2006 ­ Team is developing an implementation schedule

· Items of note:
­ enable initiation of GO science at earliest possible time (~3 months) ­ Bright Earth avoidance to protect WFC3 Pick Off Mirror (POM) ­ 3 weeks outgas required prior to detector cooldown (both channels)

· Design:
­ ­ ­ ­ Reuse as much as possible of the ACS SM3B approach (targets,etc.) Leverage off proposals and experience with SLTV Three sections: engineering, optical alignment, calibration Minimal "special commanding" (only memory dump)

· Cycle 17 Science Calibration planning to start this winter
­ Mainly detailed decisions on what to include in SMOV and what to defer ­ Expect inputs and review by SOC and STUC as this progresses
January 18/19, 2006 Wide Field Camera 3 Monthly Status Review 6

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