Visibility and Vertical Structure Measurements in Southern Germany.
Interim rept. no. 3, 21 Dec 82-21 Aug 83,
FRAUNHOFER-INST FUER ATMOSPHAERISCHE UMWELTFORSCHUNG GARMISCH-PARTENKIRCHEN (GERMANY F R)
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The lidar used for this project is a mobile system with a ruby and a neodymium glass laser transmitter. Both lasers are operated with and without frequency doubling, resulting in available frequencies of 347, 530, 694, and 1060 nm. The backscattered light is collected by a 30 cm dia. reflecting telescope, and detected by an EMI 9813 photomultiplier tube with bialkali cathode 347 and 530 nm and a large-area PIN- diode with broadband amplifier 694 and 1060 nm. The signals are digitized by a Biomation 8100 transient recorder with 8 bit amplitude resolution, 10 ns minimum sample interval and 2000 bytes memory, and further processed by an on-line computer. The range-corrected and energy-normalized backscatter profiles are represented on a display tube and plotted by an X-Y plotter, both incorporated in the lidar system. The digitized original returns incorporated in the lidar system. The digitized original returns are stored on floppy disks or magnetic tape cassette, together with housekeeping and other auxiliary data.
- Atmospheric Physics