国内外商用遥感卫星的定量化对比分析与评估

Quantitative analysis and evaluation of domestic and overseas commercial RS satellites

为了摸清国内外商用遥感卫星的差异,评估国产民用卫星在数据提供、信息获取和应用效果等方面的能力,对国内外遥感卫星进行了较为全面的调查与统计,采用卫星类型指数、波段覆盖指数及分辨率指数等定量化指标对其各项能力进行全面客观地量化分析与对比。研究结果表明:国产民用卫星的发射种类和波段覆盖范围较为齐全,但卫星数量偏少,波谱覆盖密度不及国外卫星;国产民用卫星获取超高空间分辨率影像的能力与国外星差距较大,缺少分米(dm)级分辨率的遥感卫星;在卫星应用方面,应用国外卫星数据进行研究的"中国知网"文献数量是应用国产卫星文献数量的5倍,且在每一研究领域中,单颗国产民用卫星的应用率与国外卫星相比均较低;国产民用卫星在某些方面(如独有波段)已经超过了国外卫星。因此认为,国产民用卫星具有较高的应用潜能,可以在未来发挥更强大的作用。

In order to investigate the differences between domestic and foreign commercial RS satellites,evaluate the capability of data provision,data acquisition and application effect,measure the extent of their achieving the basic needs of RS in China,the authors conducted a comprehensive investigation and statistic analysis of RS satellites used in China and abroad and set some indices,such as satellite type,band coverage and satellite resolution,with the purpose of making quantitative analysis and comparison of the capability of domestic and foreign satellites. The results show that the types of domestic satellites and spectra are relatively complete,but the number of satellites is less and the band coverage of domestic satellites is less than that of foreign satellites. In addition,the gap of capability of obtaining ultra- high spatial resolution image between domestic and overseas RS satellite is relatively large,and China lacks decimeter level resolution RS satellites. As for application effect,the number of papers on CNKI about the foreign satellites is five times that about domestic satellites. In each field,the utility ratio of single domestic satellite is lower in comparison with that of the foreign satellite. Nevertheless,domestic satellites have higher application potential than foreign satellites in some aspects,and hence they will play a powerful role in the future.