An acousto-optical radiospectrometer system for 22 GHz region line observations

Details An acousto-optical radiospectrometer system for 22 GHz region line observations An acousto-optical radiospectrometer system for 22 GHz region line observations

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....98...15m&link_type=abstract

Astronomy and Astrophysics, vol. 98, no. 1, May 1981, p. 15-18.

Physics

Optics

10

Acousto-Optics, Line Spectra, Radio Spectroscopy, Spectrometers, Spectrum Analysis, Water Masers, Computer Techniques, High Resolution, Laser Applications, Modulators, Photometers, Ultrasonic Radiation, Water Vapor

Scientific paper

A low-cost, 1024-channel, high-resolution acousto-optical spectrometer for 22-GHz region (H2O, NH3) observations constructed at the University of Helsinki Observatory is described. It is noted that the bandwidth of the spectrometer is 11.1 MHz and the resolution 20 kHz, corresponding to 150 km/sec and 0.27 km/sec, respectively. Tests are described which show the spectrometer to be stable enough for on-off-cycle times of at least 100 sec. It is noted that the spectrometer has been used for preliminary water vapor observations with good results.

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