Ames Research Center Airborne Sensor Facility MAS Spectral Measurements Review Period covered:March 2001 – March 2003 Deployments:Texas 2001 (3/15-4/5/01)

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Presentation transcript:

Ames Research Center Airborne Sensor Facility MAS Spectral Measurements Review Period covered:March 2001 – March 2003 Deployments:Texas 2001 (3/15-4/5/01) CLAMS (7/9-8/2/01) CAMEX (8/15-9/26/01) CRYSTAL (7/1-7/30/02) Texas 2002 (11/19-12/12/02) THORPEX (2/1-4/10/03) Period covered:March 2001 – March 2003 Deployments:Texas 2001 (3/15-4/5/01) CLAMS (7/9-8/2/01) CAMEX (8/15-9/26/01) CRYSTAL (7/1-7/30/02) Texas 2002 (11/19-12/12/02) THORPEX (2/1-4/10/03)

Ames Research Center Airborne Sensor Facility Noteworthy Shifts During Deployments: TX 01 : spectral shifts: p2=+8nm, p3=+10nm, p4=+20nm CLAMS : very small shifts but p2 out of spec going in CAMEX4: no shifts in ports 1, 2, and 4. uneven shift in port 3 (0nm in b26 to –30nm in b41) CRYSTAL: spectral shifts: p1=+1nm, p3=+25nm, p4=+3nm band 45 failed in the field – not available for post-deployment calibration TX 02: spectral shifts: p2=+2nm, p3=-1nm, p4=+5nm THORPEX : spectral shifts: p2=+1nm, p3=+1nm, p4=+16nm TX 01 : spectral shifts: p2=+8nm, p3=+10nm, p4=+20nm CLAMS : very small shifts but p2 out of spec going in CAMEX4: no shifts in ports 1, 2, and 4. uneven shift in port 3 (0nm in b26 to –30nm in b41) CRYSTAL: spectral shifts: p1=+1nm, p3=+25nm, p4=+3nm band 45 failed in the field – not available for post-deployment calibration TX 02: spectral shifts: p2=+2nm, p3=-1nm, p4=+5nm THORPEX : spectral shifts: p2=+1nm, p3=+1nm, p4=+16nm

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility 30” Sphere Stability Measurement dates: May 2001 (John Cooper with 746/ISIC) June 2001 (Pavel Hajek with ASD September 2001 (Pavel Hajek with ASD) December 2001 (Pavel Hajek with ASD) April 2002 (Pavel Hajek with ASD) June 2002 (John Cooper with 746/ISIC, Pavel Hajek with ASD) September 2002 (Pavel Hajek with ASD) December 2002 (Pavel Hajek with ASD) March 2003 (Pavel Hajek with ASD) Measurement dates: May 2001 (John Cooper with 746/ISIC) June 2001 (Pavel Hajek with ASD September 2001 (Pavel Hajek with ASD) December 2001 (Pavel Hajek with ASD) April 2002 (Pavel Hajek with ASD) June 2002 (John Cooper with 746/ISIC, Pavel Hajek with ASD) September 2002 (Pavel Hajek with ASD) December 2002 (Pavel Hajek with ASD) March 2003 (Pavel Hajek with ASD)

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility Cary 14 Spectrophotometer Upgraded to modern computer controls (OLIS) –But is still large, heavy –But, has great optics (and we have it) Options for use in calibration transfer: –45° mirror –Transfer integrating sphere –Fiber-optic head Upgraded to modern computer controls (OLIS) –But is still large, heavy –But, has great optics (and we have it) Options for use in calibration transfer: –45° mirror –Transfer integrating sphere –Fiber-optic head

Ames Research Center Airborne Sensor Facility Cary 14 Block Diagram

Ames Research Center Airborne Sensor Facility Cary photo 1

Ames Research Center Airborne Sensor Facility Cary photo 2

Ames Research Center Airborne Sensor Facility Cary photo 3

Ames Research Center Airborne Sensor Facility Cary photo 4

Ames Research Center Airborne Sensor Facility New 30” Sphere 12 lamps, 30W ea. 2/3 of old sphere rad. Vertical or horizontal orientation Labview Controlled Power supplies, metering mounted on unit 12 lamps, 30W ea. 2/3 of old sphere rad. Vertical or horizontal orientation Labview Controlled Power supplies, metering mounted on unit

Ames Research Center Airborne Sensor Facility Extended BB Being rebuilt Best Cal Method? Automated data logging to be added Being rebuilt Best Cal Method? Automated data logging to be added

Ames Research Center Airborne Sensor Facility Polarization Sensitivity Measurement Equipment:30” integrating sphere VIS polarizer: extinction ratio > 99.9% in nm, size > sphere aperture NIR polarizer with mask: extinction ratio > 99.9% in nm, size = 3*3 inches Procedure: Record sphere radiance for max and min positions of polarizer. Calculate percentage difference. Repeat for 15 and 20 degree MAS tilt Equipment:30” integrating sphere VIS polarizer: extinction ratio > 99.9% in nm, size > sphere aperture NIR polarizer with mask: extinction ratio > 99.9% in nm, size = 3*3 inches Procedure: Record sphere radiance for max and min positions of polarizer. Calculate percentage difference. Repeat for 15 and 20 degree MAS tilt

Ames Research Center Airborne Sensor Facility Experiment Setup

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility

Ames Research Center Airborne Sensor Facility Silver: s,p reflectivity vs. angle Rp Rs 1.24 µ

Ames Research Center Airborne Sensor Facility Silver: two-mirror throughput vs. angle 1.24 µ Normalized to 1 at 0° Two mirrors, 45° incidence, with relative axial rotation