The University of Southampton
University of Southampton Institutional Repository

Validation of the MODIS reflectance product under UK conditions

Validation of the MODIS reflectance product under UK conditions
Validation of the MODIS reflectance product under UK conditions
Surface reflectance obtained from remote sensing data is the main input to almost all remote sensing applications. The availability and special characteristics of MODIS products have led to their use worldwide. Validation of the MODIS reflectance product is then crucial to provide information on uncertainty in the reflectance data, and in other MODIS products and in the applied surface-atmosphere models. Airborne CASI and SPOT data, collected during the NCAVEO 2006 Field Campaign, were applied to validate daily MODIS reflectance data over a site in southern England. The difference in the view geometry of at-nadir CASI and SPOT data and off-nadir MODIS data was dealt with using a semi-empirical bidirectional reflectance distribution function (BRDF) model. The validation results showed that for our particular study site, the absolute errors in the MODIS reflectance product were too large to allow the albedo data to be used directly in climate models. The errors were mainly related to the uncertainties in the MODIS atmospheric variables, the BRDF model, and undetected clouds and cloud shadows. More generally, the study highlights the extreme difficulty of achieving pixel-level validation of coarse spatial resolution satellite sensor data in an environment in which the atmosphere is constantly changing, and in which the landscape is characterised by high space-time heterogeneity
0143-1161
7376-7399
Khavarian Nehzak, Hassan
1fedf36e-ab5e-4a01-9237-4564bc5a5455
Atkinson, P.M.
96e96579-56fe-424d-a21c-17b6eed13b0b
Milton, E.J.
f6cb5c0d-a5d4-47d7-860f-096de08e0c24
Stewart, J.B.
d0bd260d-bbe6-4959-97a2-43a975eecf42
Khavarian Nehzak, Hassan
1fedf36e-ab5e-4a01-9237-4564bc5a5455
Atkinson, P.M.
96e96579-56fe-424d-a21c-17b6eed13b0b
Milton, E.J.
f6cb5c0d-a5d4-47d7-860f-096de08e0c24
Stewart, J.B.
d0bd260d-bbe6-4959-97a2-43a975eecf42

Khavarian Nehzak, Hassan, Atkinson, P.M., Milton, E.J. and Stewart, J.B. (2013) Validation of the MODIS reflectance product under UK conditions. International Journal of Remote Sensing, 34 (20), 7376-7399. (doi:10.1080/01431161.2013.82036).

Record type: Article

Abstract

Surface reflectance obtained from remote sensing data is the main input to almost all remote sensing applications. The availability and special characteristics of MODIS products have led to their use worldwide. Validation of the MODIS reflectance product is then crucial to provide information on uncertainty in the reflectance data, and in other MODIS products and in the applied surface-atmosphere models. Airborne CASI and SPOT data, collected during the NCAVEO 2006 Field Campaign, were applied to validate daily MODIS reflectance data over a site in southern England. The difference in the view geometry of at-nadir CASI and SPOT data and off-nadir MODIS data was dealt with using a semi-empirical bidirectional reflectance distribution function (BRDF) model. The validation results showed that for our particular study site, the absolute errors in the MODIS reflectance product were too large to allow the albedo data to be used directly in climate models. The errors were mainly related to the uncertainties in the MODIS atmospheric variables, the BRDF model, and undetected clouds and cloud shadows. More generally, the study highlights the extreme difficulty of achieving pixel-level validation of coarse spatial resolution satellite sensor data in an environment in which the atmosphere is constantly changing, and in which the landscape is characterised by high space-time heterogeneity

This record has no associated files available for download.

More information

Published date: 30 July 2013
Organisations: Global Env Change & Earth Observation

Identifiers

Local EPrints ID: 353764
URI: http://eprints.soton.ac.uk/id/eprint/353764
ISSN: 0143-1161
PURE UUID: ff5bd0cd-9e76-4e8d-bca5-191121357ffb
ORCID for P.M. Atkinson: ORCID iD orcid.org/0000-0002-5489-6880

Catalogue record

Date deposited: 17 Jun 2013 09:03
Last modified: 15 Mar 2024 02:47

Export record

Altmetrics

Contributors

Author: Hassan Khavarian Nehzak
Author: P.M. Atkinson ORCID iD
Author: E.J. Milton
Author: J.B. Stewart

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×