Satellite-borne synthetic aperture radar antenna direction diagram obtaining method based on internal calibration data
A technology of synthetic aperture radar and antenna pattern, which is applied in the directions of antenna radiation pattern, radio wave measurement system, measuring device, etc., can solve the problem that there is no effective verification method for the performance of synthetic aperture radar satellite phased array antenna pattern, and achieve shortening The effect of improving the development cycle and improving the test efficiency
Active Publication Date: 2017-11-10
SHANGHAI SATELLITE ENG INST
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[0005] The technical problem to be solved by the present invention is to provide a spaceborne synthetic aperture radar antenna pattern acquisition method based on internal calibration data, which can solve the problem that the traditional synthetic aperture radar satellite phased array antenna has no effective pattern performance in each stage of the whole satellite test. The problem with means of verification
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[0022] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.
[0023] like figure 1 As shown, the present invention is a method for acquiring a spaceborne synthetic aperture radar antenna pattern based on internal calibration data, which includes the following steps:
[0024] Step 1: Obtain the amplitude and phase error data E of each calibration channel of the spaceborne SAR antenna calibration network during the stand-alone product test on the ground ScalorNet (f) and typical location antenna subarray pattern F mn (u,v);
[0025] Step 2: Select the appropriate radar operating parameters such as bandwidth and pulse width, and acquire and record the transmit / receive pulse calibration signals of each T / R channel of the antenna array one by one in the radar system single T / R test calibration mode ;
[0026] Step 3: Perform pulse pressure processin...
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The invention discloses a satellite-borne synthetic aperture radar antenna direction diagram obtaining method based on internal calibration data. The satellite-borne synthetic aperture radar antenna direction diagram obtaining method comprises steps of respectively obtaining amplitude phase error data and a typical position antenna sub-array direction diagram of each calibration channel of a satellite-borne synthetic aperture radar antenna calibration network when a ground standalone product is tested, choosing radar working parameters like a suitable bandwidth, a pulse width, etc, obtaining and recording emission / reception pulse calibration signals which are transmitted by each T / R channel on an antenna array plane one by one under a single T / R testing calibrated working mode . The satellite-borne synthetic aperture radar antenna direction diagram obtaining method based on internal calibration data realizes a verification test on a phased array antenna direction diagram performance (near intermediate frequency or in-band average), solves a problem that a traditional radar satellite phased array antenna has no effective assessment means performed on direction diagram performance in each stage of a whole satellite testing, greatly improves testing efficiency of a radar load during a whole satellite stage, and shortens a study cycle of the whole satellite.
Description
technical field [0001] The invention relates to a method for testing radar satellite whole-satellite radar load, in particular to a method for acquiring a spaceborne synthetic aperture radar antenna pattern based on internal calibration data. Background technique [0002] Synthetic aperture radar is an active remote sensor that works in the microwave band. It is not affected by factors such as sunshine and weather conditions, and can observe and image the earth all day long, so it has unique application advantages in disaster monitoring, environmental and ocean monitoring, resource exploration, crop yield estimation, surveying and mapping, and military affairs. The irreplaceable role of other remote sensors. [0003] Planar active phased array antennas have been widely used in spaceborne synthetic aperture radar systems due to their characteristics of high transmit peak power, large antenna gain, shapeable antenna beam, fast switching and wide-angle scanning. However, ther...
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IPC IPC(8): G01R29/08G01R29/10G01S7/40
CPCG01R29/0871G01R29/10G01S7/4004
Inventor 王海涛许丽颖张久玲姜岩薛伶玲范季夏朱鸿昌
Owner SHANGHAI SATELLITE ENG INST
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