A simplified approach to low height determination.
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Authors
Gerhan, Charles F.
Subjects
Advisors
Date of Issue
1962-06
Date
Publisher
Language
en_US
Abstract
In this report a method of height determination using ground reflected energy is analyzed and the results of relevant tests performed are reported and discussed. The approach considered differs from conventional radio altimetry in that time delay measurement is not employed. The simplicity of required equipment suggests the likelihood of space, weight, and power consumption savings. As the primary result, it is shown that an oscillator's frequency may be related to the separation between its load antenna and a reflecting surface toward which it is radiating. The resulting relationship is periodic with the frequency alternately deviating positively and negatively about a center value. The center frequency occurs at quarter wave length intervals in antenna-to-reflecting surface separation. The height information available is less than that obtained from a conventional radio altimeter, but it may be useful in some applications.
Type
Thesis