NDLI: A fast and sensitive new satellite so2 retrieval algorithm based on principal component analysis: application to the ozone monitoring instrument

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A fast and sensitive new satellite so2 retrieval algorithm based on principal component analysis: application to the ozone monitoring instrument

Content Provider	NASA Technical Reports Server (NTRS)
Author	Bhartia, Pawan K. Krotkov, A. Joiner, Joanna Li, Can
Copyright Year	2013
Description	We describe a new algorithm to retrieve SO2 from satellite-measured hyperspectral radiances. We employ the principal component analysis technique in regions with no significant SO2 to capture radiance variability caused by both physical processes (e.g., Rayleigh and Raman scattering and ozone absorption) and measurement artifacts. We use the resulting principal components and SO2 Jacobians calculated with a radiative transfer model to directly estimate SO2 vertical column density in one step. Application to the Ozone Monitoring Instrument (OMI) radiance spectra in 310.5-340 nm demonstrates that this approach can greatly reduce biases in the operational OMI product and decrease the noise by a factor of 2, providing greater sensitivity to anthropogenic emissions. The new algorithm is fast, eliminates the need for instrument-specific radiance correction schemes, and can be easily adapted to other sensors. These attributes make it a promising technique for producing longterm, consistent SO2 records for air quality and climate research.
File Size	917169
Page Count	5
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20140011341
Archival Resource Key	ark:/13960/t2m66hc9r
Language	English
Publisher Date	2013-11-22
Access Restriction	Open
Subject Keyword	Principal Component Analysis Sulfur Dioxide Ozone Monitoring Instrument (omi) Absorption Spectroscopy Rayleigh Scattering Satellite-borne Instruments Bias Variability Measuring Instruments Principal Components Analysis Ozone Air Quality Sulfur Dioxides Algorithms Radiance Radiative Transfer Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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