Scientific and Technical Aerospace Reports Volume 38 July 28, 2000

20000064076 Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA USA
Interferometer Designs for the Terrestrial Planet Finder
Lawson, P. R., Jet Propulsion Lab., California Inst. of Tech., USA; Dumont, P. J., Jet Propulsion Lab., California Inst. of Tech.,
USA; Colavita, M. M., Jet Propulsion Lab., California Inst. of Tech., USA; Optical and IR Interferometry from Ground and Space;
1999, pp. 207-212; In English; No Copyright; Avail: CASI; A02, Hardcopy; A01, Microfiche
The Terrestrial Planet Finder (TPF) is a space-based infrared interferometer that will combine high sensitivity and spatial
resolution to detect and characterize planetary systems within 15 pc of our sun. TPF is a key element in NASA’s Origins Program
and is currently under study in its Pre-Project Phase. We review some of the interferometer designs that have been considered for
starlight nulling, with particular attention to the architecture and subsystems of the central beam-combiner.
Author
Infrared Interferometers; Infrared Detectors; Terrestrial Planets; Planetary Systems; Space Exploration
20000064529 Geological Survey, Denver, CO USA
Geometric Correction of AVIRIS Imagery Using On-Board Navigation and Engineering Data
Clark, Roger N., Geological Survey, USA; Livo, K. Eric, Geological Survey, USA; Kokaly, Raymond F., Geological Survey,
USA; Summaries of the Seventh JPL Airborne Earth Science Workshop January 12-16, 1998; Dec. 19, 1998; Volume 1, pp. 57-65;
In English; See also 20000064520; No Copyright; Avail: CASI; A02, Hardcopy; A04, Microfiche
From 1989 through 1997 the NASA Airborne Visible and Infrared Imaging Spectrometer (AVIRIS) has been flown on multiple
flights on an ER-2 aircraft at approximately 20 km altitude. At the USGS, AVIRIS data have been used to make materials maps
(e.g. see our web site http://speclab.cr.usgs.gov) but registration to a map base using classical control point registration methods
with n-term polynomial or rubber sheeting image warping techniques has not fulfilled our expectations or needs, despite significant
investment in people time. The Jet Propulsion Laboratory AVIRIS Data Facility delivers numerous engineering, aircraft state,
and Global Positioning System (GPS) data sets that can be used to facilitate geometrical rectification of the imagery. Using the
JPL data, combined with Digital Elevation Models (DEM), which can crudely, but adequately, be derived from atmospheric
absorptions in the AVIRIS data, complete geometric correction appears possible. This paper derives the equations and compares
the magnitudes of effects of the ER-2 plane motions on the AVIRIS imagery using example 1995 data over Arches National Park.
Derived from text
Data Processing; Geometric Accuracy; Geometric Rectification (Imagery); Image Processing
20000064534 Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA USA
Quantum Efficient Detectors for Use in Absolute Calibration
Faust, Jessica, Jet Propulsion Lab., California Inst. of Tech., USA; Eastwood, Michael, Jet Propulsion Lab., California Inst. of
Tech., USA; Pavri, Betina, Jet Propulsion Lab., California Inst. of Tech., USA; Raney, James, Jet Propulsion Lab., California Inst.
of Tech., USA; Summaries of the Seventh JPL Airborne Earth Science Workshop January 12-16, 1998; Dec. 19, 1998; Volume
1, pp. 97-103; See also 20000064520; No Copyright; Avail: CASI; A02, Hardcopy; A04, Microfiche
The trap or quantum efficient detector has a quantum efficiency of greater than 0.98 for the region from 450 to 900 nm. The
region of flattest response is from 600 to 900 nm. The QED consists of three windowless Hamamatsu silicon detectors. The QED
was mounted below AVIRIS to monitor the Spectralon panel for changes in radiance during radiometric calibration. The next step
is to permanently mount the detector to AVIRIS and monitor the overall radiance of scenes along with calibration.
Author
Airborne Equipment; Calibrating; Infrared Spectrometers; Radiance; Radiometers; Ion Traps (Instrumentation); Radiation
Detectors
20000064535 Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA USA
Thermal Stability of the AVIRIS On-Board Calibrator
Faust, Jessica, Jet Propulsion Lab., California Inst. of Tech., USA; Eastwood, Michael, Jet Propulsion Lab., California Inst. of
Tech., USA; Sarture, Chuck, Jet Propulsion Lab., California Inst. of Tech., USA; Williams, Orlesa, Jet Propulsion Lab., California
Inst. of Tech., USA; Summaries of the Seventh JPL Airborne Earth Science Workshop January 12-16, 1998; Dec. 19, 1998; Volume
1, pp. 105-110; In English; See also 20000064520; No Copyright; Avail: CASI; A02, Hardcopy; A04, Microfiche
The AVIRIS On-Board Calibrator (OBC) provides essential data for refining the calibration of each AVIRIS data run. Annual
improvement to the AVIRIS sensor and laboratory calibration accuracy has resulted in increasingly high demands on the stability
of the OBC. Since the 1995 flight season, the OBC could track the stability of the spectrometer alignment to the 2% level, a significant
improvement over previous years. The major contributor to this 2% stability was the conversion from a constant-current bulb
power supply to an intensity-based active feedback power supply. Given the high sensor signal-to-noise ratio, improving the OBC
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