Communications: directive radio wave systems and devices (e.g. – Directive – Including a radiometer
Patent
1995-07-31
1998-03-03
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a radiometer
356216, G01S 302
Patent
active
057240434
ABSTRACT:
An apparatus for measuring the properties of the tropopause includes a variable frequency microwave radiometer operating over a range of from about 118.0 to about 119.0 GHz. The radiometer receives as an input a frequency selector signal and produces as an output a measured power level at a measurement frequency corresponding to the input frequency selector signal. The apparatus further includes a feedback controller having as an input the measured power level and producing as an output the frequency selector signal. The feedback controller varies the frequency selector signal to a target frequency so as to produce a minimum value in the measured power level. The tropopause equivalent altitude is determined from the target frequency.
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Peirce James L.
Savage Richard C.
Denson-Low W. K.
Grunebach G. S.
Hughes Aircraft Company
Phan Dao L.
Sales M. W.
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