Sar Echo Signal Throughout The Collection Storage System

Synthetic aperture radar (SAR) is an active microwave remote sensor, which has the high azimuth resolution by using the theorem of synthetic aperture. Because of its excellent performance in complex weather and high resolving power, Synthetic Aperture Radar recently is used in military and civilian widely. SAR develops rapidly in recent years, the high-speed data acquisition and storing technology, as the important part of SAR system, was given increasing attention, and got a speedy progress.In SAR system, the in-phase and quadrate radar echoes must be sampled simultaneity and stored in the recorders for a long-time. In this dissertation, a method of disk-array to record the SAR echoes is proposed for implementing Full Access. The FPGA which is produced by Altera is used to control the system's working time, to distribute the high-speed data stream and communication between acquisition module and storage module. The storage module structure of FPGA and SDRAM, they are working on caching the high-speed data stream and controlling the hard disk. This acquisition and storage system based on disk array which is composed of 4 IDE hard disks. The whole system performs average recording speed arrives at 80 MB/s, and it can be improved by increasing the number of hard disk.The primary work in this dissertation:A method was present to full access the radar echoes based on distribute the high-speed data stream and store them by disk array, and proved both by theory and experiment result.The system's construction and design proposal was introduced from every part of it.The central controlling and system working flow was completed, the PCB of this system was realized.The each part of system was test, and the result shows system work reliably and stably.