1 / 29

MAS Spectral Measurements Review

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). Noteworthy Shifts During Deployments:.

asis
Download Presentation

MAS Spectral Measurements Review

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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)

  2. 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

  3. 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)

  4. 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

  5. Cary 14 Block Diagram

  6. Cary photo 1

  7. Cary photo 2

  8. Cary photo 3

  9. Cary photo 4

  10. 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

  11. Extended BB • Being rebuilt • Best Cal Method? • Automated data logging to be added

  12. Polarization Sensitivity Measurement Equipment: 30” integrating sphere VIS polarizer: extinction ratio > 99.9% in 400-700nm, size > sphere aperture NIR polarizer with mask: extinction ratio > 99.9% in 750-2000nm, 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

  13. Experiment Setup

  14. Silver: s,p reflectivity vs. angle 1.24 µ Rp Rs

  15. Silver: two-mirror throughput vs. angle Two mirrors, 45° incidence, with relative axial rotation 1.24 µ Normalized to 1 at 0°

More Related