Accession Number:

ADA229524

Title:

Minimum Required Signal for LIMARS Experiments

Descriptive Note:

Corporate Author:

WRIGHT RESEARCH AND DEVELOPMENT CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1990-10-31

Pagination or Media Count:

42.0

Abstract:

This report determines the minimum detectable signal required to perform the Laser Imaging and Ranging System experiment. LIMARS is a direct detection laser radar using a novel receiver scheme to produce a pixel- registered range image without scanning. This work was motivated by the need to size the transmitter laser which, for this experimental system, is a NdYAG laser operation at 1.06 microns. The laser must produce at least the minimum detectable power at the detector for the experimental conditions. The minimum detectable power is that power which just exceeds the noise for given probabilities of detection and false alarm. The author included contributions of noise from scene emission, scene reflection, and internal sources, and considered experiments in the Bldg 620 Tower and Bldg 622 Collimator. For the Tower experiment, in the worst case of reflected sunlight there are 410 rms noise electrons per pixel. In the Collimator experiment, internal noise of 100 rms noise electrons per pixel dominates. The author wrote a computer program to plot the probability of detection as a function of signal electrons for given probability of false alarm and number of noise electrons using Poisson statistics. Speckle was not included in this program.

Subject Categories:

  • Lasers and Masers
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE