Share Email Print
cover

Proceedings Paper

Synthetic Aperture Imaging With A Pulsed Co2 Tea Laser
Author(s): C . C. Aleksoff; J. S. Accetta; L. M. Peterson; A. M. Tai; A. Klooster; K. S. Schroeder; R. M. Majewski; J. O. Abshier; M. Fee
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A new indoor SAL (synthetic aperture LADAR) test range is described that uses a pulsed CO2 TEA laser as the transmitter source. This monostatic range can be used to produce high-resolution 3-D synthetic aperture (range-Doppler) images of targets. The SAL is a homodyne based receiver system that uses a long path reference signal with a frequency offset generated via an acousto-optic cell. The TEA laser is a multicavity system that is stepped through a series of single frequencies to obtain the ranging information. The transmission frequencies are monitored and controlled by heterodyning part of the trans-mission signal against a stable low-pressure CW CO2 laser. Azimuth (Doppler) information is generated by stepping through a series of angles on a gimbaled transmit/receive mirror. The target and SAL are mounted on different vibration isolated tables. Motion monitoring interferometers between the tables furnish motion compensation data for the image processing stage while range variations are automatically corrected during data gathering. The TEA laser is run at up to 100 pulses per second. Both the received pulse and the trans-mitted pulse are recorded by a high speed wavefrom digitizer system. This data, along with motion compensation and reference data, is used to produce imagery via Fourier transform based processing.

Paper Details

Date Published: 24 September 1987
PDF: 13 pages
Proc. SPIE 0783, Laser Radar II, (24 September 1987); doi: 10.1117/12.940575
Show Author Affiliations
C . C. Aleksoff, Environmental Research Institute of Michigan (United States)
J. S. Accetta, Environmental Research Institute of Michigan (United States)
L. M. Peterson, Environmental Research Institute of Michigan (United States)
A. M. Tai, Environmental Research Institute of Michigan (United States)
A. Klooster, Environmental Research Institute of Michigan (United States)
K. S. Schroeder, Environmental Research Institute of Michigan (United States)
R. M. Majewski, Environmental Research Institute of Michigan (United States)
J. O. Abshier, Environmental Research Institute of Michigan (United States)
M. Fee, Environmental Research Institute of Michigan (United States)


Published in SPIE Proceedings Vol. 0783:
Laser Radar II
Richard J. Becherer; Robert C. Harney, Editor(s)

© SPIE. Terms of Use
Back to Top