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The Vaisala Ceilometer CL51 is designed to measure high-range cirrus cloud heights without surpassing the low and middle layer clouds, or vertical visibility in harsh conditions. Its backscatter profiling over full range is up to 15 km (49,200 ft).
The CL51 employs a pulsed diode laser LIDAR (Light Detection And Ranging) technology, where short, powerful laser pulses are sent out in a vertical or near-vertical direction. The reflection of light (backscatter) caused by clouds, precipitation or other obscuration is analysed and used to determine the cloud base height.
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- Cloud reporting range up to 13 km (43,000 ft)
- Backscatter profiling over full range up to 15 km (49,200 ft)
- Detection of Cirrus clouds
- Based on robust and affordable laser technology
- Extensive self-diagnostics with fault analysis
- Field proven, fully automatic 24/7 operation in all weather conditions
- Extensive self-diagnostics with fault analysis
- Second-generation, advanced single-lens optics provides excellent performance also at low altitudes
- Modular design for easy installation and maintenance
- Reliable operation in all weather; unsurpassed performance in vertical visibility and cloud detection during precipitation
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