Accession Number:

ADA235997

Title:

Analysis of IR Celestial Survey Experiment.

Descriptive Note:

Final rept. 21 Jul 86-30 Oct 89,

Corporate Author:

MISSION RESEARCH CORP SANTA BARBARA CA

Report Date:

1989-10-01

Pagination or Media Count:

214.0

Abstract:

A new computer efficient, entropy-based filter for spatial resolution improvement in images has been developed. The method, Filtered Entropy Restoration, has been applied to images constructed from IRAS telescope data. The restored images typically exhibit a factor of four improvement in spatial resolution. This work required development of a compute-efficient image construction algorithm, as the IRAS data is not in image format. Image construction required several important preprocessing steps. Development of FIER, image construction, and pre-processing algorithms are all described. IRAS is an acronym for the Infra-Red Astronomical Satellite, and the IRAS mission, a joint undertaking of the United States 50, the Netherlands 40, and Great Britain 10. IRAS was launched on 26 January 1983 and collected IR sky data continuously from 9 February 1983 through 23 November 1983, at which time the cryogen had been depleted. The primary IRAS objective was to perform a complete, very sensitive survey of the entire sky in four wavelength bands centered at 12, 25, 60, and 100 micron also referred to as IRAS Bands 1, 2, 3, and 4 respectively. Completeness of the IRAS survey was limited only by interruptions during passages through the South Atlantic Anomaly and a lunar avoidance strategy which was necessary to minimize thermal loading.

Subject Categories:

  • Infrared Detection and Detectors
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE