On the infra-red brightness level increase caused by the sun light during the eclipse period

Details On the infra-red brightness level increase caused by the sun light during the eclipse period On the infra-red brightness level increase caused by the sun light during the eclipse period

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983msct.rept..101k&link_type=abstract

In its Meteorological Satellite Center Tech. Note, No. 8, 1983 p 101-107 (SEE N84-18796 09-47)

Mathematics

Logic

Brightness, Solar Eclipses, Sunlight, Ghosts, Infrared Radiation, Meteorological Satellites

Scientific paper

A ghost image of the Sun was noticed in the GMS-2 visible imagery taken at 1600 GMT, 13th April 1982, in the last stage of the eclipse of the Sun at the satellite. An increase of infra-red radiance level of space was also found as an east-west band near the northern Earth edge in the previous observation, made at 1200 GMT of the same day. To investigate the cause of these phenomena, nine infra-red observations were examined from three other eclipse periods of the GMS-2. To make easier the identification of increased level band, specially enhanced (the coldest regions enhanced) pictures were provided. The degree of level increase was 3 to 8 levels (full range, 256 levels) and the width of increased level band was about 60 scan lines. To make clear possible relation of the sun light to these phenomena, a comparison was made between the position in the imagery and the width of the observed level increase and the calculated Sun's position and effective width in the imagery. These two observed and calculated factors agreed well. This phenomenon was not found in GMS imageries.

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