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NCC Status

NCC Status. September 25, 2012. Calvin Liang Stephanie Weiss Steve Mills NGAS A&DP. Path Forward to Investigate NCC EDR Issues. Completed In Work Planned. Proposed steps to investigate NCC issue: Collect SVDNB, GDNBO, and IVOBC granules from August 16-17 th , 2012 – Around new moon

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NCC Status

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  1. NCC Status September 25, 2012 Calvin Liang Stephanie Weiss Steve Mills NGAS A&DP

  2. Path Forward to Investigate NCC EDR Issues • Completed • In Work • Planned • Proposed steps to investigate NCC issue: • Collect SVDNB, GDNBO, and IVOBC granules from August 16-17th, 2012 – Around new moon • Construct stray light correction lookup table (LUT) from new moon data • Apply stray light correction LUT to new moon granules using NGAS stray light correction algorithm • Determine best functional fit to corrected radiances and account for night glow. (In work right now) • Produce a new GVVSSE/GVVSLE LUT based on the new functional fits. • Remove stray light in problematic granules • Run the latest version of the NCC EDR algorithm in ADL on stray light corrected granules • Inspect output to determine whether some of the problems identified in the granules go away with stray light correction • If it is found that fixing stray light does not completely solve the problems, then we will delve into the NCC EDR algorithm logic

  3. Radiance vs Solar Zenith Before Stray Light Correction Straylight Noise floor 7e-11 Current SZA cutoff = 105 C. Liang, NGAS

  4. Radiance vs Solar Zenith AfterStray Light Correction Straylight removed Need to find function(s) to fit this new area of curve Noise floor 7e-11 Some overcorrection but very little Current SZA cutoff = 105 C. Liang, NGAS

  5. Radiance vs Solar Zenith AfterStray Light Correction Straylight removed Noise floor 7e-11 Some overcorrection but very little Current SZA cutoff = 105 C. Liang, NGAS

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