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Calibration and measurement method for amplitude and phase consistency errors among satellite-borne SAR imaging receiving channels

A technology of receiving channel and measurement method, which is applied in the field of calibration measurement of amplitude and phase consistency error between receiving channels of spaceborne SAR imaging, and achieves the effect of simplifying measurement method, good effect and ensuring measurement accuracy

Active Publication Date: 2019-07-16
SHANGHAI SATELLITE ENG INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is characterized by simple requirements and no need for system software to develop a full-array non-delayed receiving calibration mode. However, since the single T / R receiving calibration belongs to time-sharing measurement, it cannot be completed to represent the normal full-array receiving working state.

Method used

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  • Calibration and measurement method for amplitude and phase consistency errors among satellite-borne SAR imaging receiving channels
  • Calibration and measurement method for amplitude and phase consistency errors among satellite-borne SAR imaging receiving channels
  • Calibration and measurement method for amplitude and phase consistency errors among satellite-borne SAR imaging receiving channels

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Embodiment

[0027] In this embodiment, the method for calibrating the amplitude-phase consistency error between the spaceborne SAR imaging receiving channels of the present invention is introduced as follows: Step 1: According to figure 1 The flow chart of calibration measurement of amplitude-phase consistency error between spaceborne SAR imaging channels is shown to complete the working status and parameter setting of the spaceborne SAR system, including signal working bandwidth and pulse width, system working mode, stand-alone main backup working status, PRF value and boot time value;

[0028] Step 2: According to figure 1 The flow chart of the calibration measurement of the amplitude-phase consistency error between the spaceborne SAR imaging channels is shown, the command package is compiled and marked, and the echo data is stored through the ground recording equipment;

[0029] Step 3: According to figure 2 The data processing flow chart shown in the figure completes data processin...

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Abstract

The invention relates to a calibration and measurement method for amplitude and phase consistency errors among satellite-borne SAR imaging receiving channels in the technical field of satellite-borneSAR imaging. The method comprises the steps of: (1) setting the working state and parameters of an SAR system, wherein the working state and parameters comprise signal working bandwidth and pulse width, a working mode, a single machine master backup state, a PRF value and the boot duration; (2) according to the working state and the parameter setting values of the system, compiling and noting an instruction packet to achieve start-up of the SAR system, and recording echo data; (3) performing format conversion and the pulse pressure processing for the recorded echo data to extract an amplitudeand a phase at a peak value after the pulse voltage for comparison and analysis; and (4) repeating the step 1 and the step 3 to finish the measurement of the amplitude and phase consistency errors ofthe imaging receiving channels under different bandwidths and different master backup states.

Description

technical field [0001] The invention relates to the technical field of space-borne SAR imaging, in particular to a method for calibrating and measuring amplitude-phase consistency error between receiving channels of space-borne SAR imaging. Background technique [0002] One of the methods for measuring the amplitude-phase consistency error between the receiving channels of spaceborne SAR imaging is to use the near-field scanning frame to measure the amplitude-phase consistency error in the microwave darkroom environment. This method is characterized by high precision and can completely cover the entire receiving channel chain. However, due to the high requirements of its measurement conditions (including test equipment and venues) and its inflexibility, it is impossible to measure and monitor amplitude-phase consistency error results at any time and under any venue. [0003] One of the measurement methods for the amplitude-phase consistency error between spaceborne SAR imagi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/418
Inventor 陶满意葛钊王伟杰范季夏涂尚坦黄源宝姜岩秦冉冉
Owner SHANGHAI SATELLITE ENG INST
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