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Proceedings Paper

Preliminary results for HCHO and BrO from the EOS-Aura Ozone Monitoring Instrument
Author(s): Thomas P. Kurosu; Kelly Chance; Christopher E. Sioris
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Paper Abstract

The Ozone Monitoring Instrument (OMI), a nadir-viewing near-UV/Visible CCD spectrometer, was launched on NASA's EOS-Aura satellite platform on 15 July 2004 into a sun-synchronous, polar orbit with an equator crossing time of 13:45h (ascending node). OMI measurements cover the spectral region of 270-500 nm with a spectral resolution between 0.42 nm and 0.63 nm and a nominal ground footprint of 13x24 km2 at nadir. Global coverage is achieved in one day. The very high spatial resolution of OMI measurements set a new standard for trace gas and air quality monitoring from space. Combined with daily global coverage, this significantly advances our ability to answer outstanding questions on air chemistry, including the determination of BrO sources in mid and low latitudes, BrO-O3 anti-correlations as a function of latitude, and the production of formaldehyde in cities of the developing world. We give an overview of the OMI instrument and introduce the operational trace gas retrieval scheme for BrO, HCHO, and OClO that is based on a direct, non-linear fitting approach of observed radiances, including corrections for spectral undersampling. We present first results for tropospheric BrO and HCHO, an important element in air quality monitoring. Only limited results are currently available for OClO, an element in the destruction cycle of polar stratospheric ozone, due to the lack of OMI observations at a time of the year where OClO loading is significantly above the detection limit from space.

Paper Details

Date Published: 30 December 2004
PDF: 8 pages
Proc. SPIE 5652, Passive Optical Remote Sensing of the Atmosphere and Clouds IV, (30 December 2004); doi: 10.1117/12.578606
Show Author Affiliations
Thomas P. Kurosu, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Kelly Chance, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Christopher E. Sioris, Harvard-Smithsonian Ctr. for Astrophysics (United States)

Published in SPIE Proceedings Vol. 5652:
Passive Optical Remote Sensing of the Atmosphere and Clouds IV
Si Chee Tsay; Tatsuya Yokota; Myoung-Hwan Ahn, Editor(s)

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