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Instruments and methods
Polarimetric Doppler radar (POLDIRAD)
Polarimetric Doppler radar (POLDIRAD)Measurements of the Doppler velocity are meanwhile standard for operational radars. Only a few radars provide the capability of polarization diversity.
Forward looking Doppler lidar for detection of aircraft wake vortices
The wake vortices generated by heavy aircraft can be a potential hazard for other aircraft flying too close to these vortices. Therefore, the development of a forward-looking sensor for the detection and warning of wake vortices is strongly forced.
Research aircraft Falcon
The research aricraft Falcon 20E, D-CMET was set in operation in 1976 and is the basic tool for German and European airborne research dealing with any kind of investigation regarding earth and atmosphere. The Falcon exceeds the flight altitude of most commercial airliners.
In situ Trace Gas Measuring Systems
The chemical trace gas measurement systems available at IPA include NO, NO2, NOy, O3, CO2, and CO. The instrument unit used for detection of reactive nitrogen employs a two-channel high sensitivity chemiluminescence NO detector.
Global models have been used in numerical weather prediction and climate research for a long time. Numerical weather prediction models make a forecast of the atmospheric state for up to two weeks based on an optimally determined initial state.
Mesoscale models are numerical tools. They are solving the conservation equations of mass, momentum, internal energy, and for various species like water vapour. Mesoscale models simulate atmospheric processes on a spatial scale from 20 to 1000 km and resolve temporal fluctuations lasting 1 to 12 hours.
Microscale models of the atmosphere are designed to simulate small-scale flow systems (e.g. turbulence, vortices, flow over obstacles) with a horizontal length scale ranging between few metres and some 100 m.
Contrail Cirrus Prediction Tool (CoCiP)
The "Contrail Cirrus Prediction Tool" CoCiP has been developed to simulate contrail cirrus resulting from a single flight as well as from a fleet of cruising aircraft, flight by flight, regionally or globally. The method predicts contrail cirrus for given air traffic and weather prediction data.
Sound propagation models
The DLR Institut für Physik der Atmosphäre develops and operates advanced sound propagation models. In combination with meteorological mesoscale and microscale models they describe the system of atmosphere, topography and sound waves in a consistent manner. The comprehensive models are the basis of more simplified noise prediction tools. These tools can be used, for example, to define low-noise approach and departure routes at airports depending on the actual weather type and taking advantage from the natural damping properties of the atmosphere and the ground. Further applications are the planning of low-noise traffic lines as well as other noise reducing measures (e.g. noise barriers).
Radiative Transfer Models
To study the radiation in the Earth's atmosphere and its interaction with water and ice clouds, aerosols, and molecules, we are developing and using several radiative transfer models, including a Matrix-Operator model (MOM), the libRadtran package, and the three-dimensional MYSTIC code.
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