Accession Number:

ADA214203

Title:

Polar Bear UV Images of Airglow and Aurora-Data Reduction and Analysis

Descriptive Note:

Technical rept. Sep 1987-Sep 1988

Corporate Author:

TEL-AVIV UNIV (ISRAEL) SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1988-09-29

Pagination or Media Count:

38.0

Abstract:

The AIRS scanning ultraviolet photometer aboard the Polar Bear satellite was launched in late 1986. It was designed to obtain UV images with high spatial and wavelength resolution at several emission lines simultaneously. The objective of the program is to geometrically and photometrically calibrate the data. The processing is designed to provide kilometer-scaled images that can be projected upon various coordinate systems. These tools afford studies of the spatial and temporal variability of airglow and aurora. Each data-stream from a pass is converted to a 240 x 240 image representing 5000 x 5000km records of intensity. The major progress during the report period has been modification and development of programs to accomplish the following 1 A Chapman function correction to the solar flux dependence of the intensity, resulting with a successful daytime fit of power unity of above variable to pixel brightness. 2 Separation of night-glow domain to ordinary and continuous 24 hr night regions. 3 Projection of images onto dipole corrected geomagnetic coordinate systems. 4 Comparison of auroral arcs with known auroral oval and initiation of a UV oval from input images. Keywords Aurora Ultraviolet Image processing Airglow. jhd

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE