Laser ceilometer with pseudo random code modulation for cloud high measurements

Krzysztof Holejko; Roman Nowak

doi:10.1117/12.438429

24 August 2001 Laser ceilometer with pseudo random code modulation for cloud high measurements

Krzysztof Holejko, Roman Nowak

Proceedings Volume 4535, Optical Sensing for Public Safety, Health, and Security; (2001) https://doi.org/10.1117/12.438429
Event: Systems of Optical Security, 2000, Warsaw, Poland

Abstract

This paper present a CW low power ceilometer designed for cloud base high measurements. The 500mW CW IR laser of the ceilometer is modulated by a pseudo noise sequence. The scattered and delayed light signal is received by a correlation system with output bandwidth of only 3,5 Hz. This enables to obtain the ranges of 1.2 km to the clouds and the accuracy of the order of +/- 2.5 m to the solid objects. The following issues are discussed: principle of operation, deice architecture and error estimation. Some measurement results are also enclosed.

Citation Download Citation

Krzysztof Holejko and Roman Nowak "Laser ceilometer with pseudo random code modulation for cloud high measurements", Proc. SPIE 4535, Optical Sensing for Public Safety, Health, and Security, (24 August 2001); https://doi.org/10.1117/12.438429

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