Measurement Principle


Real time data

Opacity and IWV

Tropospheric retrieval

LAUTLOS Campaign





Quality check




MIAWARA took part in the LAUTLOS/WAVVAP (Lapbiat Upper Tropospheric Lower Stratospheric Water Vapour Validation Project) Campaign in early 2004 in Sodankylä.

Sodankylä is located North of the Polar Circle at 67.3N,26.6E. Various balloon borne instruments (Vaisala RS 80/90/92, Lindenberg FN, Metolabor Snow-white, NOAA/CMDL Frostpoint and Lyman-alpha Flash-B) were flown intensively during February 2004. The Institute of Applied Physics participated in this campaign with MIAWARA and the airborne radiometer AMSOS. The main goal of this campaign was the intercomparison of the different sensors in the upper troposphere and lower stratosphere.

Links to different presentations of the LAUTLOS results can be found in the publications section.
MIAWARA in Sodankylä
MIAWARA in operation at Sodankylä

Comparison of microwave measurements with balloon soundings

Balloon - MW comparison
The LAUTLOS campaign allowed us to validate the lower retrieval limits of the MIAWARA profiles. MIAWARA was compared to the stratospheric instruments FLASH-B and NOAA/CMDL. The campaign showed an excellent agreement between the microwave remote sensing instrument and the in-situ balloon sensors. For a total of 10 flights the difference in the altitude layer of 20 - 25 kilometres was less than 2%. The above figure shows an example comparison of the February-18 flight.
Balloon start preparation
Preparation for a balloon launch

Microwave measurements in the sub-arctic winter

Balloon - MW comparison
Water vapour profiles as measured by MIAWARA at Sodankylä from February to April 2004 with corresponding values of the potential vorticity. The PV and water vapour values are correlated as one expects in the sub-arctic winter.