UNIDEF   23986
UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICO PARA LA DEFENSA
Unidad Ejecutora - UE
artículos
Título:
Wave Radiometer Installation In Río Gallegos, Southern Argentina
Autor/es:
P. F. ORTE, J. SALVADOR, E. WOLFRAM, R. D'ELIA, T. NAGAHAMA, Y. KOJIMA, R. TANADA, T. KUWAHARA, A. MORIHIRA, E. QUEL AND A. MIZUNO
Revista:
Proc. SPIE
Editorial:
International Conference on Applications of Optics and Photonics
Referencias:
Lugar: Braga; Año: 2011 p. 1201 - 1205
ISSN:
1996-756X
Resumen:
With the aim of contribution to the study of atmospheric ozone layer, a new sensitive radiometer for atmospheric minor constituents has been installed in the Observatorio Atmosférico de la Patagonia Austral, División LIDAR, CEILAP(CITEDEF-CONICET), in October 2010. This observatory is established in the city of Rio Gallegos (51º 36’ S, 69º 19’W), Argentina, close to the spring ozone hole.  The millimeter wave radiometer was developed in STEL (SolarTerrestrial Environment Laboratory), Nagoya University, Japan. This passive remote sensing instrument is able tomeasure the ozone (O) amount in the high stratosphere and mesosphere continuously and automatically with a high timeresolution. The millimeter wave radiometer ozone profiles will be supplemented with the ozone profiles obtained fromthe DIAL system existent in the observatory. 3The millimeter wave radiometer is based on the spectral signal detection from the atmosphere due to the molecularrotational transition of molecules under study. The operation is based on a superheterodyne system which uses aSuperconductor-Insulator-Superconductor (SIS) mixer receiver operating at 203.6GHz. The SIS mixer junction consistsof a sandwich structure of Nb/AlOx/Nb, and is cooled to 4.2K with a closed cycle He-gas refrigerator. Two additionalheterodyne-mixed stages are realized with the aim to shift the measured spectral line until a frequency around of 500MHz. A FFT (Fast Fourier Transform) spectrometer system is used as a back end.  The aims of this work are to show the potential of the millimeter wave radiometer installed in the subpolar latitudes closeto the polar ozone hole and to present the preliminary result of the first measurements.