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Proceedings Paper

EMCOR radiometer: calibration and first tests
Author(s): Doris Maier; Niklaus A. Kaempfer; W. Amacher; M. Wuethrich; J. de la Noe; P. Ricaud; P. Baron; Gerard Beaudin; C. Viguerie; J.-R. Pardo; Juan Daniel Gallego-Puyol; Alberto Barcia; J. Cernicharo; Brian N. Ellison; Richard Siddans; David N. Matheson; Klaus Kuenzi; U. Klein; B. Franke; J. Louhi; J. Mallat; M. Gustafsson; A. Raeisaenen; Alexandre Karpov
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Paper Abstract

The objective of the European project EMCOR was the development of a heterodyne receiver for the frequency range of 201 to 210 GHz for the measurement of the amounts of various minor constituents of the stratosphere involved in ozone chemistry. In order to be able to measure even very faint spectral lines a superconducting tunnel junction has been chosen as mixer element. Additionally, special care has been taken in developing the calibration unit of the system. Besides the classical hot-cold calibration three different balancing methods can be employed: a beam-switch technique with an atmospheric reference signal, a beam switch technique with a reference signal from a variable reference load or a frequency switch technique. The system has been integrated and is currently under testing. It will be installed at the International Scientific Station Jungfraujoch in he Swiss Alps and operated within the framework of the European Alpine stations of the Network for the Detection of Stratospheric Change.

Paper Details

Date Published: 19 August 1998
PDF: 12 pages
Proc. SPIE 3503, Microwave Remote Sensing of the Atmosphere and Environment, (19 August 1998); doi: 10.1117/12.319495
Show Author Affiliations
Doris Maier, Univ. of Berne (Switzerland)
Niklaus A. Kaempfer, Univ. of Berne (Switzerland)
W. Amacher, Univ. of Berne (Switzerland)
M. Wuethrich, Univ. of Berne (Switzerland)
J. de la Noe, Observatoire de Bordeaux (France)
P. Ricaud, Observatoire de Bordeaux (France)
P. Baron, Observatoire de Bordeaux (France)
Gerard Beaudin, Observatoire de Paris (France)
C. Viguerie, Observatoire de Paris (France)
J.-R. Pardo, Observatoire de Paris (France)
Juan Daniel Gallego-Puyol, OAN (Spain)
Alberto Barcia, Observatorio Astronomico Nacional (Spain) and Ctr. Astronomico de Yebes (Spain)
J. Cernicharo, Observatorio Astronomico Nacional (Spain) and Ctr. Astronomico de Yebes (Spain)
Brian N. Ellison, Rutherford Appleton Lab. (United Kingdom)
Richard Siddans, Rutherford Appleton Lab. (United Kingdom)
David N. Matheson, Rutherford Appleton Lab. (United Kingdom)
Klaus Kuenzi, Univ. of Bremen (Germany)
U. Klein, Univ. of Bremen (Germany)
B. Franke, Univ. of Bremen (Germany)
J. Louhi, Helsinki Univ. of Technology (Finland)
J. Mallat, Helsinki Univ. of Technology (Finland)
M. Gustafsson, Helsinki Univ. of Technology (Finland)
A. Raeisaenen, Helsinki Univ. of Technology (Finland)
Alexandre Karpov, Institut de Radio Astronomie Millimetrique (United States)


Published in SPIE Proceedings Vol. 3503:
Microwave Remote Sensing of the Atmosphere and Environment
Tadahiro Hayasaka; Dong Liang Wu; Yaqiu Jin; JingShang Jiang, Editor(s)

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