ETH Doppler Radar
Visit the Website of the ETH Doppler radar at www.radar.ethz.ch
The properties of snowflakes such as their size distribution, fall velocity, axial ratio or their orientation when falling are important in modelling precipitation processes or in interpreting returned radar power, especially of polarized radar. During the last decade, ground-based optical instruments for the measurement of hydrometeors have been developed at the IACETH. The first instrument worked with one light beam and it was possible to record the size, shape and an estimation of the fall velocity of each hydrometeor. The newly developed instrument works with two light beams which are vertically slightly offset. Thus, two images are recorded of each particle which can be used to calculate, in addition to the other properties, the exact fall velocity of the snowflakes. Hydrometeors can be recorded in the size range of 0.15 mm to 76 mm which includes the very large snowflakes falling within or close to the melting layer without truncating their image.
Contact: Raphael Schefold
Diese Website wird in älteren Versionen von Netscape ohne graphische Elemente dargestellt. Die Funktionalität der Website ist aber trotzdem gewährleistet. Wenn Sie diese Website regelmässig benutzen, empfehlen wir Ihnen, auf Ihrem Computer einen aktuellen Browser zu installieren. Weitere Informationen finden Sie auf
The content in this site is accessible to any browser or Internet device, however, some graphics will display correctly only in the newer versions of Netscape. To get the most out of our site we suggest you upgrade to a newer browser.