NASA NTRS · 19730011748
Infrared horizon locator
Abstract
A precise method and apparatus for locating the earth's infrared horizon from space that is independent of season and latitude is described. First and second integrations of the earth's radiance profile are made from space to earth with the second delayed with respect to the first. The second integration is multiplied by a predetermined constant R and then compared with the first integration. When the two are equal the horizon is located.
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Jalink, A., Jr.. 1973-01-30. Infrared horizon locator. https://ntrs.nasa.gov/citations/19730011748
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