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Changyong Cao NOAA/NESDIS/ORA Sept. 2007

Changyong Cao NOAA/NESDIS/ORA Sept. 2007. IASI and AIRS inter-comparison at the Simultaneous Nadir Overpass (SNOs) - Preliminary analysis. Selected sample. IASI and AIRS at the SNO.

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Changyong Cao NOAA/NESDIS/ORA Sept. 2007

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  1. Changyong CaoNOAA/NESDIS/ORASept. 2007 IASI and AIRS inter-comparison at the Simultaneous Nadir Overpass (SNOs) - Preliminary analysis

  2. Selected sample

  3. IASI and AIRS at the SNO • IASI and AIRS are atmospheric sounding instruments for weather applications (with good potential for climate). • IASI (8461 channels) and AIRS (2378 channels) provide spectrally resolved radiances in the 3.6-15.5 um spectral range. • Excellent agreement between them provides a quasi on-orbit standard Red= AIRS Black=IASI

  4. Spectral comparison

  5. Zoom in on Spectral

  6. Ozone channels

  7. Window channels

  8. Non-LTE channels

  9. March 27 SNO event (North Pole) Solar illumination Bias larger than the other case largely due to spatial mismatch

  10. April 19 SNO event update before the shutdown (South Pole 4/19/2007 11:29:52UTC Lat=-73.5 Lon=181.2) Cold case

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