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Gary Hodges

Gary Hodges. MFRSR – Multi-Filter Rotating Shadowband Radiometer MFR – Multi-Filter Radiometer NIMFR – Normal Incidence Multi-Filter Radiometer NFOV – Narrow Field-Of-View. Sept 2007. 1. 2. 4. 5. 3. 6. 8. 7. 10. 9. 11. 12. 15. 13. 16. 18. 19. 20. 22. 24. 27. Oct 2008. 1.

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Gary Hodges

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  1. Gary Hodges MFRSR – Multi-Filter Rotating Shadowband Radiometer MFR – Multi-Filter Radiometer NIMFR – Normal Incidence Multi-Filter Radiometer NFOV – Narrow Field-Of-View

  2. Sept 2007 1 2 4 5 3 6 8 7 10 9 11 12 15 13 16 18 19 20 22 24 27

  3. Oct 2008 1 2 4 5 3 6 8 7 10 9 11 12 15 13 16 18 19 20 22 24 27

  4. System Deployment • Occurred primarily over the past year • Completed Sept 08 Problems Encountered • Communication problems – Solved • Discovered an issue with some band motors – Solved • Heater board failures (Pt. 1) – Solved • Heater board failures (Pt. 2) – Investigating • Reading the head ID – Investigating

  5. Cosine Bench Comparisons before and after move to SGP

  6. Visible MFRSR Spectral Bench • ¼ m monochrometer by Spectral Products • 175 W xenon arc lamp • Scans between 390 nm and 1000 nm • Data acquisition with Keithley DMM 2000-20 • Automated computer controlled operation

  7. Calibration and Data Hierarchy Summary • a0: Raw data. No corrections, calibrations, etc. • b1: Nominally calibrated. These are lamp calibrated data. Cosine corrections and nighttime offsets have been applied, as well as diffuse corrections. • c1: Langley calibrated data. Continuously calibrated using Gueymard extra-terrestrial spectra. Available on an approximately month-delayed basis.

  8. Continuing with c1 data • Filename format is xxxmfrsraod1michyy.c1 • Copious data are included in each file, e.g., • Calibrated Data • AOD • Rayleigh Optical Depth • Ozone Information • Cosine Corrections • Filter Function Information • Nighttime Offset Information • Diffuse Correction • …And the list goes on

  9. Historical Data • Gets same treatment as current, with one main difference. Lamp (dark) data are used instead of actual nighttime measurements. • Have currently processed: • TWP (C1, 2 and 3) • NSA (C1 and 2; NIMFRs C1 and 2) • SGP (EF1, 2, 3, 4, 5, 6, 13 and C1)

  10. Maintenance Effort 19980601 - 19981028

  11. Inventory

  12. What’s Left? • Upgrade the TWP and NSA sites • Add high latitude functionality • Add “stutter” mode to improve large particle retrievals. Being addressed in ECR-00688.

  13. Summary • The SGP sites have all been completed • All are currently functioning • Effort to maintain network going forward is relatively low • Will upgrade TWP next and NSA if code is modified

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