Doppler-independent selective heterodyne radiometry for detection of remote species

Details Doppler-independent selective heterodyne radiometry for detection of remote species Doppler-independent selective heterodyne radiometry for detection of remote species

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975rsci...46.1313t&link_type=abstract

Review of Scientific Instruments, vol. 46, Oct. 1975, p. 1313-1317.

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Applications

Doppler Effect, Heterodyning, Molecular Spectra, Radiation Detectors, Radiometers, Bandpass Filters, Bandwidth, Dicke Radiometers, Frequency Measurement, Frequency Shift, Line Spectra, Quantum Theory, Signal Reception, Signal To Noise Ratios, White Noise

Scientific paper

A multiple-frequency heterodyne radiometer is proposed for the detection of radiation from known species moving with unknown velocities. Expressions for the signal-to-noise ratio and the minimum detectable total power are obtained for sinusoidal signals and for Gaussian signals with both Gaussian and Lorentzian spectra. In distinction to the conventional system, knowledge of absolute line rest frequencies and a stable tunable local oscillator are not required. The system may find use in the detection of certain remote species, such as interstellar molecules and pollutants. A number of potential applications are examined.

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