Radiance and atmosphere propagation-based method for the target range estimation

Hoonkyung Cho; Joohwan Chun

doi:10.1117/12.920882

18 May 2012 Radiance and atmosphere propagation-based method for the target range estimation

Hoonkyung Cho, Joohwan Chun

Proceedings Volume 8354, Thermosense: Thermal Infrared Applications XXXIV; 835413 (2012) https://doi.org/10.1117/12.920882
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

Target range estimation is traditionally based on radar and active sonar systems in modern combat system. However, the performance of such active sensor devices is degraded tremendously by jamming signal from the enemy. This paper proposes a simple range estimation method between the target and the sensor. Passive IR sensors measures infrared (IR) light radiance radiating from objects in dierent wavelength and this method shows robustness against electromagnetic jamming. The measured target radiance of each wavelength at the IR sensor depends on the emissive properties of target material and is attenuated by various factors, in particular the distance between the sensor and the target and atmosphere environment. MODTRAN is a tool that models atmospheric propagation of electromagnetic radiation. Based on the result from MODTRAN and measured radiance, the target range is estimated. To statistically analyze the performance of proposed method, we use maximum likelihood estimation (MLE) and evaluate the Cramer-Rao Lower Bound (CRLB) via the probability density function of measured radiance. And we also compare CRLB and the variance of and ML estimation using Monte-Carlo.

Citation Download Citation

Hoonkyung Cho and Joohwan Chun "Radiance and atmosphere propagation-based method for the target range estimation", Proc. SPIE 8354, Thermosense: Thermal Infrared Applications XXXIV, 835413 (18 May 2012); https://doi.org/10.1117/12.920882

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KEYWORDS

Chromium

Infrared sensors

Transmittance

Statistical analysis

Atmospheric propagation

Infrared radiation

Sensors

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