Performance Analysis of IRTOOL Ray Refraction Program and Comparison to LWKD and PIRAM Marine Boundary Layer Programs

Abstract

The prediction of mirage conditions by the IRTOOL engagement simulation program has been evaluated by comparison with experimental visible and IR observations extracted from the MAPTIP experiment data base. IRTOOL predictions have also been compared with the LWKD and PIRAM Boundary Layer programs for identical input conditions. For sensors located above about 20 meters the values of Minimum Mirage Range and Maximum Inter-Vision Range become inconsistent and all models show similar mirage threshold performance offset internally and from the measurements by approximately 1-3 km (5-20%). This may be related to uncertainties in the temperature profiles generated from Boundary Layer models. Variations of 2-4 deg C in Air Sea Temperature are insufficient to account for the observed deviations.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1998
Accession Number
ADA360095

Entities

People

  • Antonios Georgopoulos

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • C4I
  • Ground and Sea Platforms
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Temperature
  • Atmospheric Motion
  • Barometric Pressure
  • Boundaries
  • Boundary Layer
  • Computer Programming
  • Computer Programs
  • Computers
  • Detection
  • Detectors
  • Layers
  • Measurement
  • Meteorology
  • Refraction
  • Refractive Index
  • Temperature Gradients
  • Wave Propagation

Fields of Study

  • Physics

Readers

  • Atmospheric Remote Sensing.
  • Computational Modeling and Simulation
  • Spectroscopy.