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Spaceborne microwave radiometer system for measuring atmosphere path time-delay

A path delay, spaceborne microwave technology, applied in the field of satellite measurement, to achieve the effect of high overall utilization

Inactive Publication Date: 2013-12-04
NAT SPACE SCI CENT CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall utilization of the antenna reflector of this type of microwave radiometer is high, but it cannot be independently inverted to obtain the influence of atmospheric water vapor on the signal delay on the vertical path when there are clouds

Method used

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  • Spaceborne microwave radiometer system for measuring atmosphere path time-delay
  • Spaceborne microwave radiometer system for measuring atmosphere path time-delay
  • Spaceborne microwave radiometer system for measuring atmosphere path time-delay

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Embodiment Construction

[0016] The present invention will be further described now in conjunction with accompanying drawing.

[0017] exist figure 1 A schematic structural diagram of the spaceborne microwave radiometer system of the present invention in an embodiment is given in . The system includes an observation antenna unit 1 , a calibration antenna unit 2 , a receiving unit 3 and a control and data processing unit 4 . Wherein, the signals received by the observation antenna unit 1 and the calibration antenna unit 2 are transmitted to the receiving unit 3 respectively, and the receiving unit 3 transmits the received signals to the control and data processing Unit 4. The function and structure of each unit in the system will be further described below.

[0018] Described observation antenna unit 1 is used for receiving the microwave radiation of sea surface and atmosphere, as figure 2 and 3 As shown, it includes three feed sources 5 and one paraboloid 6, and the three feed sources 5 cover fr...

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Abstract

The invention discloses a spaceborne microwave radiometer system for measuring atmosphere path time-delay. The system comprises an observation antenna unit, a scaling antenna unit, a receiving unit, and a control and data processing unit. The observation antenna unit and the scaling antenna unit respectively transmit received signals to the receiving unit, and the receiving unit transmits the received signals to the control and data processing unit; the observation unit is used for receiving microwave radiation from sea surface or atmosphere and comprises three feed sources and a paraboloid; the three feed sources respectively cover a 18.7 GHz frequency range, a 23.8 GHz frequency range and a 37 GHz frequency range; the three feed sources are arranged along the flying direction of a satellite, the feed source with the 37 GHz frequency range is arranged in the middle during arrangement and has a wave beam direction which is oriented towards a nadir point, the feed sources with the 23.8 GHz frequency range and the 18.7 GHz frequency range are arranged at the two sides of the feed source with the 37 GHz frequency range and have wave beam directions which are respectively oriented within negative and positive 2.5 degrees at the two sides of the wave beam oriented towards the nadir point.

Description

technical field [0001] The invention relates to the field of satellite measurement, in particular to a spaceborne microwave radiometer system for measuring atmospheric path delay. Background technique [0002] Using microwave signals on satellites to measure the altitude from the satellite to the sea surface is usually achieved by sending microwave signals downward and measuring the return time of the signals. The microwave signal will be affected by the atmosphere on the transmission path during the transmission process, and the impact result will cause the signal to be delayed on the transmission path. The path delay of the wet troposphere on the vertical path can be retrieved by using the spaceborne microwave radiometer to measure the atmospheric radiation to the nadir point. As a microwave radiometer for path delay correction in the wet troposphere, its working frequency should include atmospheric water vapor absorption lines and atmospheric window channels. Among them...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
Inventor 张德海王振占王宏建蒋长宏赵瑾
Owner NAT SPACE SCI CENT CAS
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