562
Figure 3 a and b). For the atmospherically
corrected high spectral resolution FLI data, first
derivative calculations over the red edge region
(0.68 to 0.80 microns) can be performed. The
extended spectral range of the AVIRIS sensor
allows a study of the NIR region of the
spectrum.
Some problems were encountered with the
processing of both AVIRIS and FLI data. If raw
224 spectral channel AVIRIS data is used,
overlapping spectral channels from different
spectrometers must be masked in the software
using a user input channel masking vector. The
data is converted to reflectance during the
calibration stage using ground truth data. Each
image is calibrated in reflectance units using a
different calibration file and required a slightly
different channel masking vector. The current
approach easily allowed different calibration files
and masking vectors to be used for each image
but a more efficient solution would be to store
these in an image header record lessening the
chance of a mix-up in calibration files.
CONCLUSIONS
The current emphasis has been on a flexible,
expandable software environment, which allows
an analyst to interact with the data set,
displaying reflectance spectra and defining
interpretation algorithms. This feature is
considered important because of the difficulty of
assessing an optimum approach to dealing with
hyperspectral imagery. In the future we plan to
incorporate new interpretation algorithms suited
to imaging spectrometery data and remote
sensing applications.
REFERENCES
Freemantle, J. R. and Miller J. R., 1987. Spatial
Patterns in Atmospheric Aerosols from CZCS
Images Over the Great Lakes. Proceedings of
the 11th Canadian symposium on Remote
Sensing, University of Waterloo, Waterloo,
Ontario, Canada.
Miller, J. R., Hare, E. W., Hollinger, A. B. and
Sturgeon, D. R., 1987. Imaging Spectrometry as
a Tool for Botanical Mapping. SPIE Proceedings
Vol. 834. "Imaging Spectroscopy II".
Miller, J. R., Elvidge, C. D., Rock, B. N. and
Freemantle, J. R., 1990a. An Airborne
Perspective on Vegetation Phenology from the
Analysis of AVIRIS Data Sets Over the Jasper
Ridge Biological Preserve. Proceedings of the
IGRSS/URSI International Symposium,
University of Maryland, Washington, D.C., USA.
Miller, J. R., Hare, E. W., Wu, J., 1990b.
Quantitative Characterization of the Vegetation
Rededge Reflectance: An Inverted-Gaussian
Reflectance Model. Int. J. of Remote Sensing
(In Press).
PCI Inc., 1989a. Pace Programmer’s Manual, PCI
Inc Richmond Hill, Ontario, Canada.
PCI Inc., 1989b. PCIDSK Database Reference
Manual, PCI Inc Richmond Hill, Ontario,
Canada.
Rock, B. N., Miller, J. R., Moss, D. M.,
Freemantle, J. R. and Boyer M. G., 1990.
Spectral Characterization of Forest Damage
Occurring on Whiteface Mountain, NY- Studies
with the Fluorescence Line Imager (FLI) and
Ground-based Spectrometers. SPIE Proceedings
Vol. 1298, " Imaging Spectroscopy of the
Terrestrial Environment".