Share Email Print

Proceedings Paper

Ultraviolet and visible imaging and spectrographic imaging (UVISI) experiment
Author(s): James F. Carbary; Edward Hugo Darlington; Kevin J. Heffernan; Terry J. Harris; Ching-I. Meng; Mark J. Mayr; Patrick J. McEvaddy; Keith Peacock
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The ultraviolet and visible imaging and spectrographic imaging (UVISI) experiment consists of five spectrographic imagers and four imagers. These nine sensors provide spectrographic and imaging capabilities from approximately equals 110 nm to approximately equals 900 nm. The spectrographic imagers (SPIMs) share an off-axis parabolic design in which selectable slits (1.00 degree(s) X 0.10 degree(s) or 1.00 degree(s) X 0.05 degree(s)) provide spectral resolutions between approximately equals 0.5 nm and approximately equals 4.0 nm. SPIM image planes have programmable spectral dimensions with 68, 136, or 272 pixels and programmable spatial dimensions with 5, 10, 20, 40 pixels. A scan mirror sweeps the slit through a second spatial dimension and generates a spectrographic image once every 5, 10, or 20 seconds. The four imagers provide narrow-field and wide-field viewing. Each imager has a six-position filter wheel that selects various spectral regimes and neutral densities. Each of the nine sensors use intensified CCD detectors that have an intrascene dynamic range of approximately equals 103 and an interscene dynamic range of approximately equals 105; neutral density filters provide an additional dynamic range of approximately equals 102-3. An automatic gain control adjusts the intensifiers to scenes of varying intensity. UVISI also includes an image processing system that uses the raw data from any single imager to acquire and track targets of various sizes, shapes, and brightnesses. The image processor relays its results to a master tracking system that uses the UVISI data (as well as other data) to point the satellite in real time. UVISI will be launched on the MSX satellite in late 1994 and will investigate a multitude of celestial, atmospheric, and point sources during its planned five-year lifetime.

Paper Details

Date Published: 22 July 1994
PDF: 9 pages
Proc. SPIE 2217, Aerial Surveillance Sensing Including Obscured and Underground Object Detection, (22 July 1994); doi: 10.1117/12.179940
Show Author Affiliations
James F. Carbary, Johns Hopkins Univ. (United States)
Edward Hugo Darlington, Johns Hopkins Univ. (United States)
Kevin J. Heffernan, Johns Hopkins Univ. (United States)
Terry J. Harris, Johns Hopkins Univ. (United States)
Ching-I. Meng, Johns Hopkins Univ. (United States)
Mark J. Mayr, Johns Hopkins Univ. (United States)
Patrick J. McEvaddy, Johns Hopkins Univ. (United States)
Keith Peacock, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 2217:
Aerial Surveillance Sensing Including Obscured and Underground Object Detection
Ivan Cindrich; Nancy DelGrande; Sankaran Gowrinathan; Peter B. Johnson; James F. Shanley, Editor(s)

© SPIE. Terms of Use
Back to Top