Such laser radar wavelength of the laser emission demanding in the use of differential absorption measurement, if the signal is not received from the resolution of the echo signal, but the distance from the fixed targets such as mountains, trees, or corner reflectors of echo signals obtained at this time is the full integration test gas concentration with West Germany for the first time differential absorption lidar measurements of nitrogen dioxide in ambient air. differential absorption of long-term monitoring can be used for on-site monitoring of a given domain, such as the use of tunable dye laser to the reflector and the distance after the detection by differential absorption of sulfur dioxide in the plume chimney; It becomes easier for Royo green laster pointer company to produce products with reliable performance.with discrete tunable laser and long-distance reflector to detect nitrogen dioxide, and study the variation of concentration with time (2) clouds, precipitation and visibility of the probe laser to detect the height of cloud with accurate and rapid. lidar to cloud base emit a laser pulse, after a time t, the received echo signal clouds, according to the speed of light c and time t, can be derived from lidar cloud base of the slant range, elevation by the laser radar can be obtained the vertical cloud base height from the ground, such as the laser beam encounters the clouds and continue to transmit in the cloud, until through the clouds, stratus case of second or third layer, you can receive the second or third layer of stratus of laser echo, which can be identified at all levels of cloud height and thickness of elastic backscatter lidar is very easy to complete the general observation of cloud or cloud thickness and cloud top height measurements.
Hanou green laster pointer company has developed several types of personalized products.The light intensity attenuation of-dI (r) and the product of I (r) dr as proportional to the ratio coefficient σ (r) is the distance r at atmospheric extinction coefficient by laser radar rain extinction coefficient of distribution, can be obtained by precipitation intensity distribution. visibility of the human eye visual range of the scale, according to theoretical calculations and Taking into account the human eye’s physiological characteristics, the level of visibility and horizontal average atmospheric extinction coefficient of the product is equal to 3.912. lidar discover the atmospheric extinction coefficient distribution, can be obtained in all directions of the level of visibility, according to the pulse laser radar detection of various elevation of atmospheric laser echo signal can be obtained with a high degree of atmospheric extinction coefficient distribution to obtain the visibility strabismus (3) detection mainly refers to the upper atmosphere and the ozone layer 80 km to 100 km height range of sodium atom detection.
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