München 2004 – scientific programme

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UP: Umweltphysik

UP 17: Poster: Atmosph
äre und Messtechnik

UP 17.7: Poster

Tuesday, March 23, 2004, 14:00–16:00, Schellingstr. 3

Airborne microwave observations of stratospheric trace gases during SCIAMACHY validation campaigns — •Jayanarayanan Kuttippurath, Holger Bremer, Armin Kleinboehl, Harry Kuellmann, and Klaus Kuenzi — Institute of Environmental Physics, University of Bremen

The Airborne Submillimeter Radiometer is a heterodyne sensor. It operates in a tuning frequency range of 604 GHz to 662 GHz and is equipped with two spectrometers namely, AOS and CTS. The AOS has a total bandwidth of 1.5 GHz, a resolution of 1.5 MHz and is used for probing stratospheric constituents. The sensor is operated onboard a high altitude research aircraft at an altitude of about 10-13 km in order to avoid signal absorption due to tropospheric water vapour. The sensor looks upward at a zenith angle of 78 deg., detects the thermal emissions from the rotational lines of various molecules. From the pressure broadening of the detected thermal lines, vertical profiles of volume mixing ratio are retrieved employing the Optimal Estimation Method. ASUR measures a range of stratospheric molecules like, Ozone, ClO, HCl, HNO3, N2O, etc.

SCIA-VALUE 2002-03 is the validation campaigns performed onboard the DLR Falcon to validate SCIAMACHY data, which is a sensor onboard ESA’s ENVISAT satellite. A latitude band spanned from the Arctic to tropics was covered during the campaign in two different seasons. In this presentation, an overview of the ASUR sensor, the campaign, the data set gathered and the first attempts for the validation of SCIAMACHY data will be presented.