Sensor-fusion field experiment in forest ecosystem dynamics
1990
An extensive multisensor airborne and field campaign was conducted in the Northern Experimental
Forest near Bangor, Maine, during September 1989 to acquire a data set to allow us to test various
modeling hypotheses concerning the interaction of optical, thermal, and microwave electromagnetic
radiation within northern coniferous forest canopies and their underlying backgrounds. This experiment
represents a significant component of a Forest Ecosystem Dynamics project, which is concerned
with the response of northern forests to climatic and other environmental changes. Extensive
ground control information, basic remote-sensing measurements, and comprehensive calibration data
were obtained to support the interpretation of numerous airborne sensor measurements and to provide
both static and dynamic biophysical input parameters to electromagnetic scattering and absorption
models. Aircraft instruments deployed included a multifrequency, quadpolarized synthetic
aperture radar, a solid-state array bidirectional imager, and the Thematic Mapper Simulator. In
addition, a suite of helicopter-borne nonimaging systems was utilized, consisting of a multifrequency
laser polarimeter and both narrow- and broad-band spectrometers. This paper presents background
on this first Forest Ecosystems Dynamics field campaign, provides a progress report on the
analysis of the collected data and related modeling activities, and outlines plans for future experiments
at different points in the phenological cycle.
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