JWST FGS & NIRISS CVAC Tests November 1, 2011 − January 25, 2012
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2012 May 17 1 JWST FGS & NIRISS CVAC Tests November 1, 2011 − January 25, 2012 Pierre Chayer, André Martel, Alex Fullerton, Ed Nelan, Kevin Volk, Anand Sivaramakrishnan, Sherie Holfeltz, Van Dixon, Paul Goudfrooij, Deepashri Thatte, Harry Ferguson Comdev Canada, CSA, UdeM, HIA FGS: Fine Guidance Sensor NIRISS: Near-InfraRed Imager & Slitless Spectrogra
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JWST FGS & NIRISS CVAC Tests November 1, 2011 − January 25, 2012. Pierre Chayer , André Martel, Alex Fullerton, Ed Nelan , Kevin Volk, Anand Sivaramakrishnan , Sherie Holfeltz , Van Dixon, Paul Goudfrooij , Deepashri Thatte , Harry Ferguson Comdev Canada, CSA, UdeM , HIA. - PowerPoint PPT Presentation
Transcript of JWST FGS & NIRISS CVAC Tests November 1, 2011 − January 25, 2012
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JWST FGS & NIRISS CVAC TestsNovember 1, 2011 − January 25, 2012
Pierre Chayer, André Martel, Alex Fullerton, Ed Nelan, Kevin Volk, Anand Sivaramakrishnan, Sherie Holfeltz,
Van Dixon, Paul Goudfrooij, Deepashri Thatte, Harry FergusonComdev Canada, CSA, UdeM, HIA
FGS: Fine Guidance SensorNIRISS: Near-InfraRed Imager & Slitless Spectrograph
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Fine Guidance Sensor (FGS) Optical Layout
2 m
100 mm
Pick-Off Mirror
TMA Mirrors
Focus Mirror
Detectors
Role of FGS: Provides centroids to the Attitude Control System.
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FGS Optical Assembly
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FGS at the David Florida Laboratory
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FGS entering chamber
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FGS Optical Assembly
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FGS in chamber
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Optical Ground System Equipment (OGSE)
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Optical Ground System Assembly (OGSE)
NIRISS
NIRISS
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Floor plan for CVAC test
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Temperature Profile
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Chamber background
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Location of OGSE Spots in G1
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Images of OGSE Sources
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Bad Pixel Maps
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IDENTIFICATION
• Identification of the Guide Star.• Full-frame: strip readout: 36 (64x2048) strips, 8 overlaps.• ID strip integration time: 0.32 sec.• Strip readout: read-read-reset-read-read CDS1 and
CDS2.• Create two lists of bright objects.• Merge the two lists one list.• Identify guide star and ref. stars Triad algorithm.• Success Guide star is identified.• ID timing: 82.12 sec, G1, 5 stars, 8 candidates.
