Chapter 18
SOME RESEARCH AND APPLICATIONS IN THE
CSIRO (AUSTRALIA) EARTH OBSERVATION
CENTRE ON SCENE BRIGHTNESS DUE TO BRDF
David L. Jupp
CSIRO Earth Observation Centre, Australia.
1.
INTRODUCTION
A range of Earth Observation research activities in CSIRO (Australia) are
promoted and coordinated through a unit called the CSIRO Earth
Observation Centre (EOC, see http://www.eoc.csiro.au). The EOC
has been formed to coordinate CSIRO Earth Observation activities in
generic science. It is developing and supporting activities aimed at
establishing coordinated validation missions, and calibration and validation
sites in Australia to develop long term high quality data and well
characterized land surface parameters. The sites provide potential validation
for a range of products of satellite global measurements programs.
CSIRO Earth Observation scientists engage in a number of related
research and applications oriented projects involving land surface reflectance
anisotropy. In particular, these involve the issue of scene brightness, or
BRDF (Bidirectional Reflectance Distribution Function or variation in scene
radiance with Sun and look position) effects. A fundamental theme of the
work is to test/establish the existence of a stable underlying “typology” of
BRDF directly attributable to land surface spectral and structural parameters
that will allow sensible selections of the “shape functions” used in correction
and inversion algorithms. This requires the existence and use of wellestablished field sites and a range of measurements other than radiometer
data. There now exist established sites and there are important canopy and
161
M.M. Verstraete et al. (eds.), Observing Land from Space: Science, Customers and Technology, 161–173.
© 2000 Kluwer Academic Publishers. Printed in the Netherlands.
SOME RESEARCH AND APPLICATIONS IN THE
CSIRO (AUSTRALIA) EARTH OBSERVATION
CENTRE ON SCENE BRIGHTNESS DUE TO BRDF
David L. Jupp
CSIRO Earth Observation Centre, Australia.
1.
INTRODUCTION
A range of Earth Observation research activities in CSIRO (Australia) are
promoted and coordinated through a unit called the CSIRO Earth
Observation Centre (EOC, see http://www.eoc.csiro.au). The EOC
has been formed to coordinate CSIRO Earth Observation activities in
generic science. It is developing and supporting activities aimed at
establishing coordinated validation missions, and calibration and validation
sites in Australia to develop long term high quality data and well
characterized land surface parameters. The sites provide potential validation
for a range of products of satellite global measurements programs.
CSIRO Earth Observation scientists engage in a number of related
research and applications oriented projects involving land surface reflectance
anisotropy. In particular, these involve the issue of scene brightness, or
BRDF (Bidirectional Reflectance Distribution Function or variation in scene
radiance with Sun and look position) effects. A fundamental theme of the
work is to test/establish the existence of a stable underlying “typology” of
BRDF directly attributable to land surface spectral and structural parameters
that will allow sensible selections of the “shape functions” used in correction
and inversion algorithms. This requires the existence and use of wellestablished field sites and a range of measurements other than radiometer
data. There now exist established sites and there are important canopy and
161
M.M. Verstraete et al. (eds.), Observing Land from Space: Science, Customers and Technology, 161–173.
© 2000 Kluwer Academic Publishers. Printed in the Netherlands.