Minisatellite data time-choosing transmission method based on binary search

Abstract

The invention discloses a minisatellite data time-choosing transmission method based on binary search. The minisatellite data time-choosing transmission method comprises the following steps: a storage process: dividing a read cache space and a write cache space in the memory of a minisatellite, and storing user frame data into the write cache space according to a sequence of sampling time; and a reading process: setting the time range of time choosing and the data category of target data, adopting a binary search algorithm to obtain an initial page address of the target data in a memory, reading original information in the memory according to a storage sequence of the initial page address, carrying out protocol encapsulation on the read original information, and issuing through a transmitter. The minisatellite data time-choosing transmission method is simple and effective, adopts hierarchical design and has the advantages of being low in coupling between modules, high in module transportability and high in reliability, and I / O operation and business control are mutually isolated; the binary search algorithm is adopted, so that search time is short, effective data which meets destination time requirements can be obtained in short time, the use ratio of a channel is high, and the minisatellite data time-choosing transmission method has an important application meaning in a minisatellite field.

Description

technical field [0001] The invention relates to a time-picking transmission method of small satellite delay data based on binary search, and belongs to the technical field of small satellite data processing. Background technique [0002] With the development of aerospace technology, the application of small satellites is becoming more and more extensive, and the design complexity is getting higher and higher. Small satellites have the characteristics of small size, low power consumption, high integration of functional modules, large number of payloads, large data storage capacity, and high data management requirements. [0003] When the satellite is in orbit, it will generate platform telemetry data and payload data. The platform telemetry data is used to monitor the status of the platform. The data is always stored, and the amount of stored data is large. The payload is usually only opened during the test phase, and the amount of payload data generated is small, but The da...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that it takes a long time to extract some data at equal intervals from a large amount of data, and if the extraction interval is too small, the amount of redundant data will increase; if the extraction ratio is too large, the data will be too sparse, which will be greatly reduced. The amount of effective data within the target time range brings inconvenience to ground data analysis

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