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The Analysis on the relation between the Compression Method and the Performance Enhancement of MSC(Multi-Spectral Camera) Image data

机译:MSC(Multi-Spectral Camera,多光谱相机)图像数据压缩方法与性能增强之间的关系分析

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摘要

Multi-Spectral Camera(MSC) is a main payload on the KOMPSAT-2 satellite to perform the earth remote sensing. The MSC instrument has one(l) channel for panchromatic imaging and four(4) channel for multi-spectral imaging covering the spectral range from 450nm to 900nm using TDI CCD Focal Plane Array (FPA). The instrument images the earth using a push-broom motion with a swath width of 15 km and a ground sample distance (GSD) of 1 m over the entire field of view (FOV) at altitude 685 Km. The instrument is designed to have an on-orbit operation duty cycle of 20% over the mission lifetime of 3 years with the functions of programmable gain/ offset and on-board image data compression/ storage. The compression method on KOMPSAT-2 MSC was selected and used to match EOS input rate and PDTS output data rate on MSC image data chain. At once the MSC performance was carefully handled to minimize any degradation so that it was analyzed and restored in KGS(KOMPSAT Ground Station) during LEOP and Cal./Val.(Calibration and Validation) phase. In this paper, on-orbit image data chain in MSC and image data processing on KGS including general MSC description is briefly described. The influences on image performance between on-board compression algorithms and between performance restoration methods in ground station are analyzed, and the relation between both methods is to be analyzed and discussed.
机译:多光谱相机(MSC)是KOMPSAT-2卫星上的主要有效载荷,用于执行地球遥感。 MSC仪器使用TDI CCD焦平面阵列(FPA),具有一个450到900nm光谱范围的全色成像的一(l)通道和多光谱成像的四(4)通道。该仪器使用扫帚运动对地球成像,在685 Km的整个视场(FOV)上,扫幅宽度为15 km,地面采样距离(GSD)为1 m。该仪器设计为在3年的任务寿命内具有20%的在轨运行占空比,并具有可编程增益/偏移量和机载图像数据压缩/存储功能。选择了KOMPSAT-2 MSC上的压缩方法,并将其用于匹配MSC图像数据链上的EOS输入速率和PDTS输出数据速率。立即对MSC性能进行了认真的处理,以最大程度地减少降解,以便在LEOP和Cal / Val。(校准和验证)阶段对KGS(KOMPSAT地面站)进行分析和恢复。本文简要介绍了MSC中的在轨图像数据链和包括一般MSC描述在内的KGS图像数据处理。分析了机载压缩算法之间以及地面站性能恢复方法之间对图像性能的影响,并分析和讨论了这两种方法之间的关系。

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