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Dual-mode radiometer system for millimetre-submillimetre waves

A submillimeter wave, radiometer technology, applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, radio wave measurement systems, etc., can solve the problem of inability to realize antenna combination, etc. The effect of improving the working bandwidth

Active Publication Date: 2011-11-23
NAT SPACE SCI CENT CAS
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Problems solved by technology

However, the antenna arrays of the GeoSTAR system and the GAS system are both "Y"-shaped antenna arrays. Although this antenna array is convenient to fold and unfold, which is beneficial to rocket transportation, it cannot be combined with a real aperture antenna at all, and other solutions must be found. way

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  • Dual-mode radiometer system for millimetre-submillimetre waves
  • Dual-mode radiometer system for millimetre-submillimetre waves
  • Dual-mode radiometer system for millimetre-submillimetre waves

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] The present invention provides a dual-mode millimeter-wave / submillimeter-wave radiometer system, including an interferometric synthetic aperture radiometer and a real aperture radiometer, characterized in that: the interferometric synthetic aperture radiometer includes a loop antenna array, N sets of receiver components, a set of digital correlators, a set of calibration / scaling unit, a data processing unit and a set of rotary control mechanism; the real aperture radiometer includes a pair of large-aperture reflector antennas, a set of receivers components, a calibration unit and a rotary control mechanism.

[0051] The loop antenna array is composed of small-aperture unit antennas, and the position arrangement of the unit antennas is the result of optimizing the observation baseline formed by them. The loop antenna array can rotate and...

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Abstract

The invention discloses a dual-mode radiometer system for millimetre-submillimetre waves. The system comprises an interference synthetic aperture radiometer and a real aperture radiometer, wherein the interference synthetic aperture radiometer adopts an annular surface antenna array with a vacant center; the antenna array can carry out spin-scanning in the antenna array plane around a central axis; the real aperture radiometer adopts large-caliber reflector antennae; and the reflector antennae are nested in the central position of the annular antenna array and can realize 2-degree-of-freedom rotary scanning in the azimuth direction and the pitch direction. The system has the following advantages: the observed frequency band width of the system is expanded; the complexity of the whole system is reduced; and the whole spatial resolution and imaging efficiency of the system are improved.

Description

technical field [0001] The present invention mainly relates to a passive microwave imager in the field of aerospace remote sensing, and in particular to a radiometer system that uses the combination of interferometric synthetic aperture imaging technology and large-aperture real-aperture imaging to realize broadband and high-resolution geosynchronous orbit earth observation , a dual-mode radiometer system for millimeter and submillimeter waves. Background technique [0002] At present, geostationary meteorological satellites mainly use infrared and visible light detection technology. Different from infrared and visible light, millimeter wave / submillimeter wave has a certain penetration effect on cloud and rain atmosphere, and cloud and rain atmosphere will affect the transmission of microwave radiation through absorption, emission and scattering, which is related to the thermal structure and microphysical characteristics of the atmosphere Therefore, the thermal structure an...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S7/02G01S13/95
CPCY02A90/10
Inventor 吴季刘浩张成张升伟
Owner NAT SPACE SCI CENT CAS
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