Hygrometer Intercomparison Campaign at Sodankylä, LAUTLOS Jan 26-Feb 28, 2004 Esko Kyrö 1, Rigel Kivi 1, Juha Karhu 1, Timo Turunen 1, Tuomo Suortti 1,

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Hygrometer Intercomparison Campaign at Sodankylä, LAUTLOS Jan 26-Feb 28, 2004 Esko Kyrö 1, Rigel Kivi 1, Juha Karhu 1, Timo Turunen 1, Tuomo Suortti 1, Timo Sukuvaara 1, Ari Paukkunen 2, Paul Ruppert 3, Rolf Maag 3, Thomas Brossi 3, Ulrich Leiterer 4, Tatjana Naebert 4, Gisela Peters 4, Vladimir Yuskov 5, Alexander Lukyanov 5, Alexander Katz 5, Sergey Khaikin 5, Leonid Korshunov 5, Daria Vasilyeva 5, Holger Vömel 6, Roland Neuber 7, Marion Müller 7, Niklaus Kämpfer 8, Beat Dauber 8, Alexander Häfele 8, Dietrich Feist 8 1. Finnish Met. Institute-Arctic Research Centre, Sodankylä, Finland 2. Vaisala Oyj, Helsinki, Finland 3. Meteolabor AG, Zürich, Switzerland 4. German Weather Service, Meteorological Observatory Lindenberg, Germany 5. Central Aerological Observatory, Moscow, Russia 6. University of Colorado, Boulder, USA 7. Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany 8. University of Bern, Switzerland

Vaisala radiosonde RS-80 uses single Humicap A-polymer or H-polymer (used at FMI)

Vaisala RS-90 sonde has dual H-polymer humicap switching sequentially between heating(=de-icing) and measuring cycles ( at FMI). FN-sonde of Lindenberg Observatory, Germany, uses slightly modified Vaisala RS-90 and Lindenberg’s own calibration/calculation method

Vaisala radiosonde RS-92 (2005 –> at FMI). Humicap-H unit in the sensorboom is the same as in RS-90. Developments in sensor technology, in ground preparation of Humicap, calibration and computation procedures of Humicap, and code correlating GPS Wind finding. All digital.

Peltier cooled dew/frostpoint mirror hygrometer ”Snow White” of Meteolabor AG, Switzerland. The mirror and sondepackage.

Cryogen cooled Fostpoint mirror Hygrometer (CFH) of Colorado University: The mirror, control board and sonde package

Lyman Alpha hygrometer from Central Aerological Observatory, FLASH

MIAWARA, the 22 Ghz travelling microwave radiometer of University of Bern

D. Feist, University of Bern

RS-80 RS-92 FLASH FN-90 Lindenberg NOAA SnowWhite LAUTLOS Payload configuration

LAUTLOS water vapor campaign action at Sodankylä, Jan 26 - Feb 27, 2004

Typical balloon trajectory

Tropospheric part of profiles

Water vapour profiles from the ground to the mesosphere Data from LAUTLOS campaign in Sodankylä, Feb. 2004

Profiles of Cryogenic Frostpoint Hygrometer of NOOA and Lyman-alpha hygrometer of CAO on the flight of Feb 17. A.Luklyanov