Abstract
EMCOR is a heterodyne receiver for the frequency range of 201 to 210 GHz. It has been designed for ground-based measurements of various minor constituents of the stratosphere involved in ozone chemistry. Since the aim was the detection of faint spectral lines, a superconducting tunnel junction has been chosen as mixer element and special care has been taken in developing the calibration unit of the system. The front-end is completed by a quasi-optical system, a solid state local oscillator with electronic tuning and a HEMT pre-amplifier. In the back-end an acousto-optical spectrometer is employed to analyse the signal. A PC controls the whole system. The instrument has been installed at a high mountain site in the Swiss Alps.
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Maier, D., Kämpfer, N., de la Noë, J. et al. European Minor Constituent Radiometer: A New Millimeter Wave Receiver for Atmospheric Research. International Journal of Infrared and Millimeter Waves 22, 1555–1575 (2001). https://doi.org/10.1023/A:1015091928090
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DOI: https://doi.org/10.1023/A:1015091928090