Validation of MODIS Aerosol Optical Depth Retrieval Over Land
Aerosol optical depths are derived operationally for the first time over land in the visible wavelengths by MODIS (Moderate Resolution Imaging Spectroradiometer) onboard the EOSTerra spacecraft. More than 300 Sun photometer data points from more than 30 AERONET (Aerosol Robotic Network) sites global...
Main Authors: | , , , , , , |
---|---|
Language: | unknown |
Published: |
2001
|
Subjects: | |
Online Access: | http://hdl.handle.net/2060/20010119957 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:20010119957 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:20010119957 2023-05-15T13:06:03+02:00 Validation of MODIS Aerosol Optical Depth Retrieval Over Land Einaudi, Franco Remer, L. A. Chu, D. A. Tanre, D. Kaufman, Y. J. Ichoku, C. Holben, B. N. Unclassified, Unlimited, Publicly available [2001] application/pdf http://hdl.handle.net/2060/20010119957 unknown Document ID: 20010119957 http://hdl.handle.net/2060/20010119957 No Copyright CASI Earth Resources and Remote Sensing 2001 ftnasantrs 2015-03-15T02:27:37Z Aerosol optical depths are derived operationally for the first time over land in the visible wavelengths by MODIS (Moderate Resolution Imaging Spectroradiometer) onboard the EOSTerra spacecraft. More than 300 Sun photometer data points from more than 30 AERONET (Aerosol Robotic Network) sites globally were used in validating the aerosol optical depths obtained during July - September 2000. Excellent agreement is found with retrieval errors within (Delta)tau=+/- 0.05 +/- 0.20 tau, as predicted, over (partially) vegetated surfaces, consistent with pre-launch theoretical analysis and aircraft field experiments. In coastal and semi-arid regions larger errors are caused predominantly by the uncertainty in evaluating the surface reflectance. The excellent fit was achieved despite the ongoing improvements in instrument characterization and calibration. This results show that MODIS-derived aerosol optical depths can be used quantitatively in many applications with cautions for residual clouds, snow/ice, and water contamination. Other/Unknown Material Aerosol Robotic Network NASA Technical Reports Server (NTRS) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Earth Resources and Remote Sensing |
spellingShingle |
Earth Resources and Remote Sensing Einaudi, Franco Remer, L. A. Chu, D. A. Tanre, D. Kaufman, Y. J. Ichoku, C. Holben, B. N. Validation of MODIS Aerosol Optical Depth Retrieval Over Land |
topic_facet |
Earth Resources and Remote Sensing |
description |
Aerosol optical depths are derived operationally for the first time over land in the visible wavelengths by MODIS (Moderate Resolution Imaging Spectroradiometer) onboard the EOSTerra spacecraft. More than 300 Sun photometer data points from more than 30 AERONET (Aerosol Robotic Network) sites globally were used in validating the aerosol optical depths obtained during July - September 2000. Excellent agreement is found with retrieval errors within (Delta)tau=+/- 0.05 +/- 0.20 tau, as predicted, over (partially) vegetated surfaces, consistent with pre-launch theoretical analysis and aircraft field experiments. In coastal and semi-arid regions larger errors are caused predominantly by the uncertainty in evaluating the surface reflectance. The excellent fit was achieved despite the ongoing improvements in instrument characterization and calibration. This results show that MODIS-derived aerosol optical depths can be used quantitatively in many applications with cautions for residual clouds, snow/ice, and water contamination. |
author |
Einaudi, Franco Remer, L. A. Chu, D. A. Tanre, D. Kaufman, Y. J. Ichoku, C. Holben, B. N. |
author_facet |
Einaudi, Franco Remer, L. A. Chu, D. A. Tanre, D. Kaufman, Y. J. Ichoku, C. Holben, B. N. |
author_sort |
Einaudi, Franco |
title |
Validation of MODIS Aerosol Optical Depth Retrieval Over Land |
title_short |
Validation of MODIS Aerosol Optical Depth Retrieval Over Land |
title_full |
Validation of MODIS Aerosol Optical Depth Retrieval Over Land |
title_fullStr |
Validation of MODIS Aerosol Optical Depth Retrieval Over Land |
title_full_unstemmed |
Validation of MODIS Aerosol Optical Depth Retrieval Over Land |
title_sort |
validation of modis aerosol optical depth retrieval over land |
publishDate |
2001 |
url |
http://hdl.handle.net/2060/20010119957 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
CASI |
op_relation |
Document ID: 20010119957 http://hdl.handle.net/2060/20010119957 |
op_rights |
No Copyright |
_version_ |
1766401493317976064 |