A multi-source data file system based on nand FLASH

Abstract

A NAND FLASH-based on-board solid storage multi-source data file system, including a multi-source payload data flow control module, a 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 Create modules. The system of the present invention breaks the limitation that the traditional on-board solid storage cannot independently generate files according to the load type when multi-source load data is input at the same time, and solves the constraints of the traditional solid-borne storage on the execution of the load task, the complicated operation and realization process, and the on-board hardware resources. It realizes the fusion processing of multi-source load data on the star and the rapid download of one or several specific load data that users care about.

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 ...

AI Technical Summary

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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