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Simulation of error in optical radar range measurements.

S Der1, B Redman, R Chellappa

  • 1U.S. Army Research Laboratory, Ft. Belvoir, Virginia 22060, USA.

Applied Optics
|February 9, 2008
PubMed
Summary

This study presents a computer simulation to analyze laser radar range accuracy, considering atmospheric and target effects. Simulation results were validated against field test data for improved range measurement precision.

Area of Science:

  • Optics and Photonics
  • Computer Simulation
  • Remote Sensing

Background:

  • Pulsed laser radars (LIDAR) are crucial for remote sensing.
  • Accurate range measurements are vital for LIDAR applications.
  • Atmospheric and target characteristics can significantly impact LIDAR performance.

Purpose of the Study:

  • To develop and validate a computer simulation for assessing range accuracy in pulsed laser radars.
  • To investigate the influence of atmospheric conditions, target properties, and sensor parameters on range measurement errors.
  • To compare simulation outcomes with real-world field test data.

Main Methods:

  • Development of a comprehensive computer simulation model.
  • Inclusion of parameters such as speckle, turbulence, and near/far-field effects.

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  • Simulation of arbitrary target geometries and various atmospheric conditions.
  • Direct detection using p-i-n or avalanche photodiodes.

    • Main Results:

    • The simulation accurately models range errors for laser radars with accuracies smaller than the pulse width.
    • It accounts for complex interactions between laser pulses, atmospheric media, and target surfaces.
    • Validated simulation data shows good agreement with field-collected range error data.

    Conclusions:

    • The developed computer simulation is a valuable tool for predicting and understanding range errors in pulsed laser radars.
    • This simulation aids in optimizing LIDAR system design and operational parameters for enhanced accuracy.
    • The findings contribute to improving the reliability of remote sensing and target detection technologies.