Cart (Loading....) | Create Account
Close category search window
 

The MODIS 2.1-μm channel-correlation with visible reflectance for use in remote sensing of aerosol

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

6 Author(s)
Kaufman, Y.J. ; NASA Goddard Space Flight Center, Greenbelt, MD, USA ; Wald, A.E. ; Remer, L.A. ; Bo-Cai Gao
more authors

A new technique for remote sensing of aerosol over the land and for atmospheric correction of Earth imagery is developed. It is based on detection of dark surface targets in the blue and red channels, as in previous methods, but uses the 2.1 μm channel, instead of the 3.75 μm for their detection. A 2.1-μm channel is present on ADEOS OCTS and GLI and planned on EOS-MODIS and EOSP, and a similar 2.2-μm channel is present on Landsat TM. The advantage of the 2.1-μm channel over the 3.75-μm channel is that it is not affected by emitted radiation. The 2.1-μm channel is transparent to most aerosol types (except dust) and therefore can be used to detect dark surface targets. Correlation between the surface reflection in the blue (0.49 μm), red (0.66 μm), and 2.1 μm is established using atmospherically corrected Landsat TM and AVIRIS aircraft images collected over the Eastern United States, Maine, and California and spectral data obtained from the ground and light aircraft near San Diego, CA. Results from a variety of surface covers show that the surface reflectance at 0.49 μm (ρ0.49) and 0.66 μm (ρ0.66) can be predicted from that at 2.2 μm (ρ2.2) within Δρ=±0.06 for ρ2.2⩽0.10, using ρ 0.492.2/4 and ρ0.662.2/2. Error in surface reflectance of 0.006 corresponds to an error in remote sensing of aerosol optical thickness, τ, of Δτ~±0.06. These relationships were validated using spectral data taken close to the surface over vegetated areas in a different biome. This method expends application of dark targets for remote sensing of aerosol to brighter, nonforested vegetation. The higher reflection of the surface at 2.2 μm than that of 3.75 μm may even enable remote sensing of dust above surfaces with reflectivity ρ2.2=0.15±0.05. For this reflectivity range the dust radiative effect at 2.2 μm is small, and the surface reflectance in the blue and red channels can be retrieved

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:35 ,  Issue: 5 )

Date of Publication:

Sep 1997

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.