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Wide-band heterodyne submillimetre wave spectrometer for planetary atmospheres

Show simple item record Schlecht, Erich 2010-08-18T23:28:14Z 2010-08-18T23:28:14Z 2010-03-23
dc.identifier.citation 21st International Symposium On Space Terahertz Technology, Oxford University, 23-25 March, 2010 en_US
dc.identifier.clearanceno 10-1617
dc.description.abstract We present calculations and measurements on a passive submillimetre wave spectroscopic sounder to gather data on the thermal structure, dynamics and composition of the upper atmosphere of a planet, e.g. the stratosphere of Jupiter, or the entire thickness of the atmosphere of Mars. The instrument will be capable of measuring wind speeds, temperature, pressure, and key constituent concentrations in the stratosphere of the target planet. This instrument consists of a Schottky diode based front end and a digital back-end spectrometer. It differs from previous space-based spectrometers in its combination of wide tunability (520-590 GHz), and rapid frequency switching between widely spaced lines within that range. This will enable near simultaneous observation of multiple lines, which is critical to the reconstruction of atmospheric pressure and density versus altitude profiles. At the same time frequency accuracy must be high to enable wind speeds to be determined directly by measurement of the line’s Doppler shift. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2010. en_US
dc.subject Schottky diodes en_US
dc.subject Schottky mixer en_US
dc.subject Submillimeter en_US
dc.title Wide-band heterodyne submillimetre wave spectrometer for planetary atmospheres en_US
dc.type Preprint en_US

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