Physics
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987opten..26..513m&link_type=abstract
Optical Engineering (ISSN 0091-3286), vol. 26, June 1987, p. 513-519.
Physics
1
Halogen Occultation Experiment, Pointing Control Systems, Solar Sensors, Tracking Filters, Calibrating, Radiometers, Scientific Satellites, Solar Simulators, Upper Atmosphere
Scientific paper
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 at NASA Langley for the Upper Atmosphere Research Satellite. The system uses a Galilean telescope to form a solar image on a linear silicon photodiode array. The array is a self-scanned monolithic CCD. 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 700-nm operating wavelength. The design provides for loss of individual photodiode elements without loss of angular tracking capability.
Mauldin E. III L.
Mayo L. S.
Moore Alastair S.
Stump C. W.
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