Ground-based terahertz cloud detection radar system and detection method thereof

A cloud-measuring radar system and detection method technology, which is applied to the ground-based terahertz cloud-measuring radar system and its detection field, can solve the problems of not adopting the separation method of sending and receiving, and achieve the effect of reducing the transmission power of the system

Active Publication Date: 2017-08-18
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

However, so far, there is no patent on a practical ground-based cirrus cloud observation rad...

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  • Ground-based terahertz cloud detection radar system and detection method thereof
  • Ground-based terahertz cloud detection radar system and detection method thereof
  • Ground-based terahertz cloud detection radar system and detection method thereof

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Embodiment Construction

[0057] based on the following Figure 1 ~ Figure 2 , specifically explain the preferred embodiment of the present invention.

[0058] Such as figure 1 As shown, the present invention provides a ground-based terahertz cloud radar system, comprising:

[0059] A chirp signal generating module 1 is used to generate a chirp signal to obtain a higher cloud profile resolution, and the pulse width of the chirp signal is adjustable from 2 μs to 1 ms;

[0060] A frequency synthesizer module 2, which is electrically connected to the chirp signal generating module 1, is used to generate a K-band excitation signal source. The K-band excitation signal source includes: a transmitting excitation signal (with a bandwidth of about 8.3 MHz), a receiving excitation signal (with a bandwidth of 9.89375GHz point frequency signal), secondary down-conversion local oscillator signal (working frequency 500MHz), and global clock signal (working frequency is 100MHz point frequency signal);

[0061] A t...

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Abstract

The invention discloses a ground-based terahertz cloud detection radar system and a detection method thereof. A linear frequency modulation signal generation module generates linear frequency modulation signals with an adjustable pulse width; a frequency synthesizer module generates transmitting excitation signals and receiving excitation signals; a terahertz transmitting module generates terahertz transmitting signals; a terahertz receiving module converts terahertz echo signals to intermediate frequency signals; an intermediate frequency signal receiving and processing module generates baseband signals; a signal processing module carries out signal processing on the baseband signals; and an upper computer completes cloud observation data inversion processing on a signal processing result of the signal processing module. A linear frequency modulation working system and an adjustable pulse width are adopted, a high distance resolution can be acquired, requirements on the system transmitting power can be reduced, cloud observation from a ground near distance to a far distance can be met, radar reflectivity factor information with high cloud profile resolution can be provided, cloud space-time and cloud weather macro and micro information of an observation area can be acquired further, and the system and the method can also be used for detection of tiny particles such as haze in the environment.

Description

technical field [0001] The invention relates to the technical field of weather radar active remote sensing, in particular to a ground-based terahertz cloud-measuring radar system and a detection method thereof. Background technique [0002] Clouds play a very important role in the earth-atmosphere system. By affecting the short-wave radiation from the sun to the earth and the long-wave radiation from the earth, they affect the radiation balance of the earth-atmosphere system; clouds are the main carrier of cloud formation and rain. controls the water cycle throughout the Earth; clouds are also a major source of uncertainty affecting current climate research and weather forecasts. The main remote sensing methods of clouds are divided into passive remote sensing and active remote sensing. Among them, passive remote sensing can obtain the macroscopic physical characteristics of clouds, with a large coverage area and low vertical and horizontal resolution. The development of act...

Claims

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Application Information

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IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 王平王海涛何静王斌韩永金
Owner SHANGHAI RADIO EQUIP RES INST
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