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Optical Engineering

Digital Solar Edge Tracker For The Halogen Occultation Experiment
Author(s): L. E. Mauldin; A. S. Moore; C. W. Stump; L. S. Mayo
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Paper Abstract

The optical and electronic design of the Halogen Occultation Experiment (HALOE) elevation sun sensor is described. The HALOE instrument is a gas-correlation radiometer now being developed by NASA Langley Research Center for the Upper Atmosphere Research Satellite (UARS). The system uses a Galilean telescope to form a solar image on a linear silicon photodiode array. The array is a self-scanned monolithic charge-coupled device. The addresses of both solar edges imaged on the array are used by the control/pointing system to scan the HALOE science instantaneous field of view (IFOV) across the vertical solar diameter during instrument calibration and then to maintain the science IFOV 4 arcmin below the top edge during the science data occultation event. Vertical resolution of 16 arcsec and a radiometric dynamic range of 100 are achieved at the 0.7 µm operating wavelength. The design provides for loss of individual photodiode elements without loss of angular tracking capability.

Paper Details

Date Published: 1 June 1987
PDF: 7 pages
Opt. Eng. 26(6) 266513 doi: 10.1117/12.7974107
Published in: Optical Engineering Volume 26, Issue 6
Show Author Affiliations
L. E. Mauldin, NASA Langley Research Center (United States)
A. S. Moore, NASA Lanalev Research Center (United States)
C. W. Stump, NASA Langley Research Center (United States)
L. S. Mayo, NASA Langley Research Center (United States)

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