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A General Data Processing System for Remote Sensing Payload Based on Queuing

A general-purpose data and processing system technology, applied in the direction of digital transmission system, transmission modification based on link quality, transmission system, etc., can solve the problems of no data sorting solution, data splicing on the ground, etc., and achieve enhanced processing and interpretation capabilities , achieve generalization and ensure safety

Active Publication Date: 2017-11-17
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

Since AOS transmission frames in the same virtual channel enter different physical channels randomly, normal data splicing cannot be performed on the ground, which leads to the need to sort the data of the same virtual channel in multiple physical channels and restore them into different The problem of the complete data frame of the virtual channel, so that the image can be spliced ​​and displayed normally
[0004] However, in the polarization multiplexing mode, the existing system does not have a data ordering solution for the same virtual channel under multiple physical channels

Method used

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  • A General Data Processing System for Remote Sensing Payload Based on Queuing
  • A General Data Processing System for Remote Sensing Payload Based on Queuing
  • A General Data Processing System for Remote Sensing Payload Based on Queuing

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Embodiment Construction

[0034]The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0035] The invention provides a general data processing system for remote sensing loads, which is used to process the same virtual channel data transmitted by multiple physical channels in the polarization multiplexing mode. The key to the processing is to process the same virtual channel data transmitted by multiple physical channels put in order. In the process of satellite data processing, the processing object of decoding and de-formatting is AOS transmission frame, and the object of decompression processing is the valid data in AOS transmission frame. After the decompression link, there is no virtual channel information available, so it must be decompressed Completed queued processing before. When there is an error in the AOS transmission frame and the virtual channel count is wrong, the queuing algorithm cannot obtain the correct virtual channel coun...

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Abstract

The invention discloses a queuing based remote sensing load universal data processing system, which is used for processing the same virtual channel data downloaded to multiple physical channels in a polarized multiplexing mode. According to the queuing based remote sensing load universal data processing system, queuing processing is added between unformatted processing and uncompressing processing, so that advanced orbiting system (AOS) transmission frames of the same virtual channel downloaded to multiple physical channels are sequentially restored to original load data, randomly transmitted AOS data frames of the virtual channel are restored completely according to different physical channels in the polarized multiplexing mode, the capacity in processing and interpreting remote sensing data is improved, and universalization of the overall process of processing is realized. In order to realize the queuing function, a virtual channel identifier in the AOS transmission frame and a characteristic byte of frame count are used for identifying transmission frames corresponding to the same virtual channel identifier, then the frame count is extracted, and queuing is performed according to the size of the frame count. The algorithm is simple and reliable.

Description

technical field [0001] The invention relates to the technical field of remote sensing data processing, in particular to a general data processing system for remote sensing loads. Background technique [0002] Remote sensing satellite sensors output observation information or image data, which are formatted according to the CCSDS-AOS protocol after compression. The multiple channels of data are respectively defined through separate virtual channels to form continuous AOS (Advanced On-Orbit System) transmission frames, and then sent to the physical channel after multiplexing. The physical channel data is sent to the ground after channel coding, modulation, and power amplification. After the satellite load data is obtained on the ground, the baseband data is obtained through demodulation, and the baseband data is restored to the original measurement information or image data after synchronization, decoding, deformatting, and decompression. [0003] In order to maximize the ut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L5/00
CPCH04L1/0008H04L5/0044
Inventor 杨黎赵利民张英辉刘勇倪琳娜彭亏
Owner BEIJING INST OF SPACECRAFT SYST ENG
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