CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Microwave radiometer to retrieve temperature profiles from the surface to the stratopause

O. Stähli ; A. Murk ; N. Kämpfer ; C. Mätzler ; Patrick Eriksson (Institutionen för rymd- och geovetenskap, Global miljömätteknik och modellering)
Atmospheric Measurement Techniques (1867-8548). Vol. 6 (2013), 9, p. 2477-2494.
[Artikel, refereegranskad vetenskaplig]

TEMPERA (TEMPERature RAdiometer) is a new ground-based radiometer which measures in a frequency range from 51-57 GHz radiation emitted by the atmosphere. With this instrument it is possible to measure temperature profiles from ground to about 50 km. This is the first ground-based instrument with the capability to retrieve temperature profiles simultaneously for the troposphere and stratosphere. The measurement is done with a filterbank in combination with a digital fast Fourier transform spectrometer. A hot load and a noise diode are used as stable calibration sources. The optics consist of an off-axis parabolic mirror to collect the sky radiation. Due to the Zeeman effect on the emission lines used, the maximum height for the temperature retrieval is about 50 km. The effect is apparent in the measured spectra. The performance of TEMPERA is validated by comparison with nearby radiosonde and satellite data from the Microwave Limb Sounder on the Aura satellite. In this paper we present the design and measurement method of the instrument followed by a description of the retrieval method, together with a validation of TEMPERA data over its first year, 2012.

Nyckelord: WATER-VAPOR, CLOUD LIQUID, OCCULTATION, ATMOSPHERE, RADIOSONDE, NETWORK, SYSTEM, LIDAR



Denna post skapades 2013-11-04. Senast ändrad 2014-09-02.
CPL Pubid: 186038

 

Läs direkt!

Lokal fulltext (fritt tillgänglig)

Länk till annan sajt (kan kräva inloggning)