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Radio-acoustic sounding system (RASS)

IMK-IFU operates a sodar-RASS, i.e. a conventional SODAR together with a pair of electro-magnetic antennas (one for emitting and one for receiving the radar beam). This instrument supplies the vertical temperature profile up to about 540 m above ground.
Sodar-RASS with three acoustic (white) and two electro-magnetic antennas.

Height range:                                  540 m

height resolution:                              10 m

time resolution:                          10 - 30 min

acoustic frequency:             1500 - 2200 Hz

electro-magnetic frequency:             474 MHz


Application of RASS data

Determination of the vertical temperature profile

Determination of the structure and diurnal evolutuion of the boundary layer


Contact: Stefan Emeis