Ultra-high speed SAR (Synthetic Aperture Radar) data recorder and data recording method

Abstract

The invention provides an ultra-high speed SAR (Synthetic Aperture Radar) data recorder. The recorder comprises an industrial computer, a field-programmable gate array, two groups of independent cacheunits, a storage medium and a drive and software module, wherein a control core of the industrial computer is an industrial computer main-board; the industrial computer main-board is provided with 4-8 independent paths of high-speed PCIe (Peripheral Component Interface express) 3.0 interfaces; the field-programmable gate array is used as a bridge chip of the PCIe and is in data transmission withthe industrial computer through the PCIe interfaces; the field-programmable gate array includes an internal register, a DMA (Direct Memory Access) controller and a PCIe hard core; the two groups of independent cache units are connected with the field-programmable gate array and are used as ping-pong cache units of SAR original data; the storage medium is connected with the industrial computer main-board and is used as a storage unit to implement data recording; and the drive and software module includes a first drive program used for driving data acquisition card hardware equipment to operate,a second drive program used for driving a solid-state disc to implement read and write functions, and data recording control software used for performing control and data recording of a DMA read-in process. The ultra-high speed SAR data recorder is beneficial to improving the data recording speed and recording capacity and is high in reliability, the production process is simplified and the costis low.

Description

technical field [0001] The invention belongs to the field of synthetic aperture radar raw data recording, and relates to an ultra-high-speed SAR data recorder and a data recording method. Background technique [0002] Synthetic Aperture Radar (SAR) is a high-resolution microwave imaging radar, which is used in civil land survey, environmental and disaster monitoring, ocean observation, sea surface pollutant monitoring, topographic mapping, resource exploration, interstellar survey, etc. All aspects play a very important role, with the advantages of all-day, all-weather, and resolution not affected by the height of the carrier platform. [0003] The SAR data recorder is an important part of the airborne synthetic aperture radar. It is generally used to record the raw data generated by the extension, as well as the image data. These data contain all the status information of the SAR system during the surveying flight. Therefore, Whether it is for subsequent fine imaging or fo...

AI Technical Summary

Problems solved by technology

At present, the development of SAR data recorder needs to be customized according to the specific working parameters of the radar on the one hand, and the cost is very high; The greater complexity is to obtain a speed of more than 1GBps in standby mode, and there is limited room for improvement. Data loggers based on discrete FLASH chips often need to perform reliability tests and fatigue tests on each FLASH chip during the production process. The production process is cumbersome and time-consuming.

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