The University of Southampton
University of Southampton Institutional Repository

The temporal dynamics of calibration target reflectance

The temporal dynamics of calibration target reflectance
The temporal dynamics of calibration target reflectance
A field experiment investigated the hypothesis that the nadir reflectance of calibration surface substrates (asphalt and concrete) remains stable over a range of time-scales. Measurable differences in spectral reflectance factors were found over periods as short as 30 minutes. Surface reflectance factors measured using a dual-field-of-view GER1500 spectroradiometer system showed a relationship with the relative proportion of diffuse irradiance, over periods when solar zenith changes were minimal. Reflectance measurements were collected over precise points on the calibration surfaces using a novel mobile spectroradiometer device, and uncertainty in terms of absolute reflectance was calculated as being < 0.05% within the usable range of the instrument (400-1000nm). Multi-date reflectance factors were compared using one-way ANOVA and found to differ significantly (p = 0.001). These findings illustrate the anisotropic nature of calibration surfaces, and place emphasis on the need to minimise the temporal delay in collection of field spectral measurements for vicarious calibration or empirical atmospheric correction purposes.
Anderson, K.
ef4598bc-7bac-4a63-8d41-ec30d6cfd2b6
Milton, E.J.
f6cb5c0d-a5d4-47d7-860f-096de08e0c24
Rollin, E.M.
32665285-7f95-40a4-9775-7a9b2958f758
Anderson, K.
ef4598bc-7bac-4a63-8d41-ec30d6cfd2b6
Milton, E.J.
f6cb5c0d-a5d4-47d7-860f-096de08e0c24
Rollin, E.M.
32665285-7f95-40a4-9775-7a9b2958f758

Anderson, K., Milton, E.J. and Rollin, E.M. (2003) The temporal dynamics of calibration target reflectance. Scales and Dynamics in Observing the Environment, Nottingham, UK. 09 - 11 Sep 2003. 14 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

A field experiment investigated the hypothesis that the nadir reflectance of calibration surface substrates (asphalt and concrete) remains stable over a range of time-scales. Measurable differences in spectral reflectance factors were found over periods as short as 30 minutes. Surface reflectance factors measured using a dual-field-of-view GER1500 spectroradiometer system showed a relationship with the relative proportion of diffuse irradiance, over periods when solar zenith changes were minimal. Reflectance measurements were collected over precise points on the calibration surfaces using a novel mobile spectroradiometer device, and uncertainty in terms of absolute reflectance was calculated as being < 0.05% within the usable range of the instrument (400-1000nm). Multi-date reflectance factors were compared using one-way ANOVA and found to differ significantly (p = 0.001). These findings illustrate the anisotropic nature of calibration surfaces, and place emphasis on the need to minimise the temporal delay in collection of field spectral measurements for vicarious calibration or empirical atmospheric correction purposes.

Text
ka_RSPSoc03.pdf - Other
Download (526kB)

More information

Published date: September 2003
Additional Information: CD-ROM
Venue - Dates: Scales and Dynamics in Observing the Environment, Nottingham, UK, 2003-09-09 - 2003-09-11

Identifiers

Local EPrints ID: 5012
URI: http://eprints.soton.ac.uk/id/eprint/5012
PURE UUID: 53eed058-e2d0-4f5c-8b29-f880512f191e

Catalogue record

Date deposited: 21 May 2004
Last modified: 11 Dec 2021 13:21

Export record

Contributors

Author: K. Anderson
Author: E.J. Milton
Author: E.M. Rollin

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.

×