Fast Sweeping Interferometer with Digital Data Integration.
Final rept. 9 Oct 67-31 Dec 69,
LOWELL TECHNOLOGICAL INST RESEARCH FOUNDATION MASS
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Accurate frequency and time resolution for solar dekameter observation is obtained with an interferometer which steps within 50 msec through the band from 24 to 48 MHz using 160 kHz frequency increments. Alternatively adding and subtracting the two antenna signals at a rate of 3 kHz increases the system sensitivity by application of phase coherent detection. On-line digital integration of the interferometer data generates median values for 128 different frequencies by integrating over 40 sweeps, i.e., two seconds. The system operates with a new digital data output device that prints the median amplitudes in a way which permits easy optical recognition of the fringe pattern. Author