CRISTA-NF - a Helium-cooled Infrared Telescope for the Atmosphere

First Preliminary Results

The radiation sensed by the infrared detectors is assigned to each single altitude level. The intensity ratio of two specific wave length regimes allows for a first survey of the transparency of the atmosphere for infrared radiation. The so called Cloud Index along the flight track is shown in the following plots with non-transparent clouds in blue.

Cloud Index of selected SCOUT-O3 transfer flights 2005

Transfer flight 1: Oberpfaffenhofen - Larnaca (Cyprus) on Nov.04, 2005
Transfer flight 2: Larnaca (Cyprus) - Dubai on Nov.04, 2005
Transfer flight 9: Thailand- Hyderabad (India) on Dec.13, 2005
Transfer flight 11: Dubai - Larnaca (Cyprus) on Dec.16, 2005

Cloud Index of AMMA transfer flights 2006

Transfer flight 1: Verona (Italy) - Marrakesh (Morocco) on July 31, 2006
Transfer flight 2: Marrakesh - Ouagadougou (Burkina Faso) on Aug.01, 2006
Transfer flight 3: Ouagadougou - Marrakesh on Aug.16, 2006
Transfer flight 4: Marrakesh - Verona on Aug.17, 2006

Cloud Index and observation of PSCs during RECONCILE 2010:

Local flight 3: Kiruna on Jan. 22, 2010. The gray circle marks the polar
stratospheric cloud (PSC).
Local flight 4: Kiruna on Jan. 24, 2010. The gray circles mark the polar
stratospheric clouds (PSC).