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A spaceborne terahertz ice cloud nadir detector system

A technology of terahertz and detectors, which is applied in the field of detector systems, can solve problems such as the difficulty of heat dissipation of the feed array and the receiving front end, and the impact of detector detection accuracy, so as to improve design flexibility and engineering realizability, and improve the main beam Efficiency and improvement of detection accuracy

Active Publication Date: 2020-12-18
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0004] The existing airborne prototype and spaceborne design (ICI) both adopt the design scheme of integrating the feed array and the receiving front end to realize the separation of feed and signal. The front-end heat dissipation is difficult, which in turn affects key performances such as the detection accuracy of the detector

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  • A spaceborne terahertz ice cloud nadir detector system
  • A spaceborne terahertz ice cloud nadir detector system
  • A spaceborne terahertz ice cloud nadir detector system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] According to the radiation characteristics of ice clouds, the spaceborne terahertz ice cloud nadir detector system selects the highly sensitive 183-664GHz frequency band for detection. The spaceborne terahertz ice cloud nadir detector system adopts a full-power radiometer, including: antenna and scanning subsystem, multi-band terahertz receiving channel, calibration subsystem, data acquisition and processing platform, control power distribution system and control and signal Handle equipment.

[0021] The system has an integrated design, antenna and scanning subsystem, multi-band terahertz receiving channel, calibration subsystem, data acquisition and processing platform and control power distribution display system are installed in the detection head of the system; control and signal processing equipment installed on a satellite platform.

[0022] The on-orbit...

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Abstract

The invention discloses a satellite-borne terahertz ice cloud nadir detector system, which comprises an antenna and scanning subsystem, a multi-frequency-band terahertz receiving channel, a calibration subsystem, a data collecting and processing platform, a control power distribution system and control and signal processing equipment, wherein the antenna and scanning subsystem, the multi-frequency-band terahertz receiving channel, the calibration subsystem, the data collecting and processing platform and the control power distribution system are installed on a detection head part; the controland signal processing equipment is installed on a satellite platform; and the detection head part carries out conical scanning, and observation for a target, observation for a thermal calibration source body and observation for cold air are successively finished in a scanning process so as to realize the scanning imaging of ice cloud and the in-orbit two-point calibration of a detector. A receiving front end design scheme of an offset paraboloid reflector and a quasi-optics feed network is adopted, and conical scanning is carried out through a rotary antenna feeder system to realize the nadirobservation of ice water particles in cloud.

Description

technical field [0001] The invention belongs to the technical field of space microwave remote sensing and relates to a detector system. Background technique [0002] In the earth observation system, cloud is one of the most important and most difficult meteorological elements to determine, especially the ice cloud in the upper troposphere, which has a high coverage rate on the earth's surface and has an important impact on the earth's energy balance, climate change and weather evolution . The size of ice crystals in ice clouds is generally several to several thousand microns. The microwave and millimeter waves used in traditional space-borne remote sensing systems are not sensitive to ice clouds, and infrared / visible light has poor penetration to ice clouds, so they cannot achieve effective detection. probing. The wavelength of the terahertz wave (100GHz-10THz) between the microwave / millimeter wave and the infrared / visible light is closer to the size of the main particles ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01W1/00G01W1/10
CPCG01W1/00G01W1/10
Inventor 吕容川王虎何征沈尚宇杨小娇宋广南李鹏飞王家坤
Owner XIAN INSTITUE OF SPACE RADIO TECH
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