Reflectance properties of West African savanna trees from ground radiometer measurements. II. Classification of components

N. P. Hanan, S. D. Prince, J. Franklin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The reflectance properties in the red and near-infrared of three Sahelian tree species were measured using a pole-mounted radiometer, and classified depending on their location over the canopy. A geometrical description of the patterns of shadow and sunlight on and beneath a model tree when viewed from above is given and six components defined. These components are: 1) sunlit soil, 2) sunlit canopy over sunlit soil, 3) sunlit canopy over shaded soil, 4) shaded canopy over shaded soil, 5) shaded canopy over sunlit soil and 6) shaded soil. The classification differs from the four-component model of Li and Strahler in that the presence or absence of shadow on the ground is considered. The average reflectances differ between components in the red, but in the near-infrared no statistical differences were observed. The results for the red waveband suggest that the presence of shadow on the ground under these fairly open canopies is important in determining the reflectance of the components. -from Authors

Original languageEnglish (US)
Pages (from-to)1081-1097
Number of pages17
JournalInternational Journal of Remote Sensing
Volume14
Issue number6
StatePublished - 1993
Externally publishedYes

Fingerprint

Radiometers
radiometer
savanna
reflectance
canopy
Soils
soil
near infrared
Infrared radiation
Poles

ASJC Scopus subject areas

  • Computers in Earth Sciences

Cite this

Reflectance properties of West African savanna trees from ground radiometer measurements. II. Classification of components. / Hanan, N. P.; Prince, S. D.; Franklin, J.

In: International Journal of Remote Sensing, Vol. 14, No. 6, 1993, p. 1081-1097.

Research output: Contribution to journalArticle

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