HALO
The german research aircraft HALO (High Altitude and Longe Range Research Aircraft) for atmospheric investigations over long ranges and altidudes up to 15km
Solar radiation is the driving force for atmospheric dynamics and photochemistry. The radiometrical determination of solar radiation related quantities is therefore important for a quantitative understanding of meteorological and photochemical processes and their interactions, as well as for the remote sensing of atmospheric parameters.
Spectral and integral radiation quantities can be determined with a number of instruments under field- and laboratory conditions. At the ICE-3, measurements of actinic radiation, meteorological broadband measurements and the use of a sun photometer are carried out.
Actinic radiation measurements to determine photolysis frequencies have been made since many years at ICE-3. Absolutely calibrated spectral radiometers and filter radiometers are used for that purpose. These instruments are deployed for ground based field measurements, for experiments in the atmosphere simulation chamber SAPHIR, and on mobile platforms like the Zeppelin-NT and the research aircraft HALO. In addition, the spectral radiometers serve as a reference for instruments of other institutions. A roof platform with subjacent laboratory is available for such comparisons under field conditions, as well as calibration facilities. Moreover, measurements can be made to characterise photochemical laboratory reactors and simulation chambers.
Pyranometers, pyrgeometers and pyrheliometers for the determination of solar and terrestrial radiation flux densities are operated to support the continuous JOYCE observations. The instruments are installed on a suntracker to distinguish between direct and diffuse solar radiation. In addition, the suntracker can be applied for the determination of spectral radiation quantities (actinic radiation).
Since 2012 a sun photometer is operated that determines wavelength dependent aerosol optical depths and the amount of precipitable water vapour. The instrument is part of the world-wide AERONET network and also provides important data for the retrieval of cloud optical depths under overcast conditions.
For our research, we use measurement data collected using our scientific infrastructure:
Banner foto: CHUTTERSNAP auf Unsplash