Ground terahertz radar system for detecting cloud
A terahertz and cloud measurement technology, applied in the field of radar, can solve problems such as weak echo intensity, weak laser penetration, and lidar penetration, so as to improve accuracy, improve quality, and improve system resolution and sensitivity Effect
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[0042] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0043] The center frequency of the terahertz signal can be 110GHz, 150GHz, 220GHz, 340GHz, the working bandwidth is 300MHz~5GHz (resolution up to 3cm), the power output is 200mW~100W, and the pulse width is 100ns~3μs (step size is 100ns) , the pulse repetition frequency (PRF) is 1 ~ 10KHz (step size is 1KHz).
[0044] The parameters of the terahertz radar system need to be specifically analyzed and screened according to the characteristics of the cloud.
[0045] (1) Determine the center frequency
[0046] Different detection frequency bands have different sensitivities to meteorological targets. At the above-mentioned atmospheric windows of 110GHz, 150GHz, 220GHz and 340GHz, the attenuation is relatively small, and the one-way attenuation per kilometer is about 5-6dB, and as the altitude increases, the moisture content in the atmosphere decreases rapidly...
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