A model-based aircraft identification technique and its performance at Long Jump IV

Ramesh Sharma

doi:10.1117/12.2300204

29 January 1991 A model-based aircraft identification technique and its performance at Long Jump IV

Ramesh Sharma

Proceedings Volume 1725, Targets, Backgrounds, and Discrimination; 172504 (1991) https://doi.org/10.1117/12.2300204
Event: Infrared Information Symposia, 1989, Ann Arbor, MI, United States

Abstract

An IRAMMP field measurement exercise was conducted during July 1990 in the Florida Keys. The purpose of the exercise was to investigate horizon radiance phenomenology and associated clutter structure. In the exercise both the IRAMMP sensor and a PtSi imager were used. The sensors were located 31 m above the surface of the water in a ocean side apartment building. The IRAMMP sensor is a dual band 120 element radiometric scanner with an IFOV of 250 microradians. The PtSi sensor was a commercial staring instrument with a 85 microradian IFOV. High quality digital data were obtained on a number of days and nights over a three week time span. In most of the data sequences a bright IR point source on a small boat was observed as it transited over the horizon. The precise range to the point source was recorded at all times. An excellent set of meteorological "ground truth" data was collected in conjunction with a parallel NRL/NOSC field exercise called KEY90. This paper is a partial report on results obtained from the analysis of data from the Florida field measurements. Emphasis in this paper will be on three aspects of the low horizon phenomenology. These are: 1) the form of the radiance profile singularity in the vicinity of the horizon line, 2) the appearance of a point source as it traverses the horizon, and 3) the solar glitter pattern seen on the water under a favorable illumination geometry.

Citation Download Citation

Ramesh Sharma "A model-based aircraft identification technique and its performance at Long Jump IV", Proc. SPIE 1725, Targets, Backgrounds, and Discrimination, 172504 (29 January 1991); https://doi.org/10.1117/12.2300204

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