Spectron SE590 Radiometer
OTTER Data Description
Date:
March 3, 1992
Instrument Description:
The Spectron instrument is a portable, battery-powered
spectroradiometer, weighing about 1 kg, with interchangeable detector
heads. The three measurement heads have the following spectral ranges:
350-1100 nm, 400-800 nm, and a shortwave infrared (SWIR) head with a
1100-2500 nm range.
Each of the detector heads uses a diffraction grating to disperse the
incoming light onto a linear photodiode array. The signal is conducted to
the controller electronics via a cable. The controller is microprocessor
based and processes the signal from the detector head. Integration times
are from 1/60 sec to 1.0 sec. The integration time can be automatically
selected by the instrument or manually chosen by input from a key pad.
The SWIR head always collects data with a 1.0 sec integration time.
The SE590 can use an AC/DC converter instead of battery power. The
instrument stores data in 16-bit words. The visable-to-near infrared
heads record data in 256 channels and the SWIR head in 66 channels.
Scans can be internally averaged.
Data can be output to a laptop computer through an RS 232 port, an
oscilloscope, or to a built-in tape recorder. Data processing by the laptop
computer results in an output file normalized to counts/sec.
OTTER Use of Spectron Radiometers:
This instrument has been used to take spectra of foliage, ground, and
asphalt samples in the field and dried plant specimens in the laboratory.
See the description of data collection by each investigator in the
database.
OTTER Data Acquisition:
Sites where Spectron data have been gathered are shown below broken
down according to OTTER investigator. Consult the database for specific
dates of acquisition and for the materials for which spectra were taken.
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Freemantle Goward ISTS* Johnson Strahler
Site**
C. H. X X X X
W. W. X X
Scio X X X X X
S. P. X X X X X
Met. X X X X X
Jun. X X X X X
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* personnel from the Institute for Space and Terrestrial Science gathered
these data
**Site Abbreviations: C. H. = Cascade Head; W. W. = Warings Woods; S. P. =
Santiam Pass; Met. = Metolius; Jun. = Juniper
Data Decommutation:
(See listing of OTTER contacts below)
OTTER contacts (these are scientists who have contributed Spectron data
to the database):
James. R. Freemantle
Earth Observations Laboratory
Institute for Space and Terrestrial Science
4850 Keele Street, North York, Ontario
CANADA, M3J 3K1
Tel: 416/665-5405,
Dr. Sam Goward
Dept. of Geography
University of Maryland
College Park, MD 20742
Tel: 301/405-4055
Lee F. Johnson
TGS Technology, Inc.
MS 242-4, Ames Research Center
Moffett Field, Calif. 94035
Tel: 415/604-3331
Dr. John. R. Miller
Earth Observations Laboratory
Institute for Space and Terrestrial Science
4850 Keele Street
North York, Ontario
CANADA, M3J 3K1
Tel: 416/736-2100, ext. 77729
Dr. Alan Strahler
Department of Geography
Boston University
Boston, Massachusetts 02215
Tel: 617/353-5984
References:
Hall, F. , D. Strebel, J. Nickeson, and S Goetz. 1991. Radiometric
rectification: Towards a common radiometric response among multidata,
multi-sensor images. Remote Sensing of Environment 35:11-27.
Miller J, C. Elvidge, B. Rock, and J. Freemantle. 1990. An airborne
perspective on vegetation phenology from the analysis of AVIRIS data sets
over the Jasper Ridge Biological Preserve. Proceedings IGARSS'90
Washington, D. C., pp 565-568, May 20-24.
Reflectance Calibration Standards, Labsphere, Inc. P.O. Box 70, North
Sutton, NH, USA 03260.
Schott, J. , C. Salvaggio, and W. Volchok. 1988. Radiometric scene
normalization using pseudoinvariant features. Remote Sensing of
Environment 26:1-16.
SE590 Field-Portable Data-logging Spectroradiometer Operating Manual,
Spectron Engineering, Inc. 225 Yuma Court, Denver CO 80223 USA.
author and date of extract: Jay Skiles, March 3, 1992