NAND FLASH-based spaceborne permanent storage multi-source data file system

Abstract

Provided is an NAND FLASH-based spaceborne permanent storage multi-source data file system. The system includes a multi-source load data flow control module, multi-source data multi-file address management module, a system information table creation module, a file directory table creation module and a file address information table creation module. The system breaks the limitation that traditionalspaceborne permanent storage cannot independently generate files according to a load type when multi-source load data is input simultaneously, solves the problems of constraint of the traditional permanent storage when a load task is executed, complicated operation achievement processes and high requirement of spaceborne hardware resources, and achieves rapid download of one or several specific load data which a user cares about and fusion processing of the spaceborne multi-source load data.

Description

technical field [0001] The invention relates to the field of spacecraft data storage, in particular to a NAND FLASH-based on-board solid storage multi-source data file system. Background technique [0002] With the rapid development of satellite remote sensing technology, the original data rate of the payload is as high as several Gbps or even dozens of Gbps. Due to the speed limit of the satellite-to-ground transmission channel and the limited number of ground receiving stations, the satellite payload data cannot be quickly downloaded to the ground. At present, remote sensing satellites record the original high-speed data in real time through the on-board solid-state memory, and perform low-speed playback and download of the data recorded in the solid memory when transiting or passing through the station. The "fast record and slow playback" data caching strategy of the permanent storage has played an important role in the remote sensing satellite data transmission task. In ...

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Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and to provide a NANDFLASH-based on-board solid storage multi-source data file system, which breaks the traditional on-board solid storage multi-source load data that cannot be input according to the load type at the same time. Independent generation of file restrictions solves the constraints of traditional solid storage on the execution of load tasks, complex operation and implementation processes, and high requirements for on-board hardware resources, and realizes the fusion processing of on-board multi-source load data and care for users Fast download of one or several specific load data

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