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Development of Independent Rejection Algorithm for Retrieval Quality Control at AIRS Science Team Meeting

This presentation discusses the objective of developing a rejection algorithm independent of forecast SST to improve retrieval quality control for outliers and cases where cloud clearing assumptions fail, specifically focusing on the night/descending orbit and well-known stratus contaminated areas. The algorithm aims to avoid using abs(SST-NCEP) < 3 and will be implemented in the next delivery to NOAA/NRT.

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Development of Independent Rejection Algorithm for Retrieval Quality Control at AIRS Science Team Meeting

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  1. Retrieval Quality ControlAIRS Science Team MeetingGreenbelt, MarylandOctober 2003 Sung-Yung Lee, Carol Bruegge, Luke Chen, Evan Fishbein, Denise Hagan, Edward Olsen, Eric Fetzer

  2. Objective • Current rejection criteria leave many outliers • 10% overall • Unable to detect cases where cloud clearing assumptions fail • Night/Descending orbit has much more outliers • Mostly over well known stratus contaminated area • Impact above boundary layer seems small • Develop rejection algorithm independent of Forecast SST • Avoid using abs(SST-NCEP) < 3. • JPL members are studying post retrieval tests • To be implemented in the next delivery to NOAA/NRT • Early January implementation for February 2004 delievery

  3. SST Retrieval - ECMWFDescending Orbits of January 3rd, 2003

  4. SST Retrieval - ECMWFAscending Orbits of January 3rd, 2003

  5. Tb983 - Tb860Descending Orbits

  6. Tb983 - Tb860Ascending Orbits

  7. Case StudyGranule 85 of Jan 3rd, 2003 NCEP SST Obs 2616 cm-1 Br Temp

  8. Cloud Cleared Radiancesand Cloud Fraction Cloud Cleared 2616 cm-1 Cloud Fraction

  9. HHA Weak Water Line TestTb_2610 - Tb_2607 Weak Water Line Depth Scatter Diagram

  10. SST - NCEP SST - NCEP 2616 cm-1

  11. Retrieval QC Tasks

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