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Data quality analysis of ZY-3 02 satellite laser altimeter

  • role： First author第一作者
  • Affiliation：

    Satellite Surveying and Mapping Application Center, Beijing 100048, China

    Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China

  • Email：ligy1984@qq.com
  • Introduction：李国元，1984年生，副研究员，研究方向为激光测高卫星数据处理与应用研发。E-mail：ligy1984@qq.com
LI Guoyuan12,  
  • Affiliation：

    Satellite Surveying and Mapping Application Center, Beijing 100048, China

    Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China

GAO Xiaoming12,  
  • Affiliation：

    Satellite Surveying and Mapping Application Center, Beijing 100048, China

CHEN Jiyi1,  
  • Affiliation：

    Satellite Surveying and Mapping Application Center, Beijing 100048, China

    Beijing Satellite Information Technology Co., Ltd, Beijing 100048, China

ZHAO Yanming13,  
  • Affiliation：

    Satellite Surveying and Mapping Application Center, Beijing 100048, China

MO Fan1,  
  • Affiliation：

    Satellite Surveying and Mapping Application Center, Beijing 100048, China

ZHANG Yue1

resumen

Civilian earth observation satellite laser altimetry has developed rapidly in recent years. The ZY-3 02 satellite was launched and loaded as the first Chinese earth-observing satellite laser altimeter. The GF-7 satellite and terrestrial ecosystem carbon monitoring satellite with laser altimeter will be launched in the next several years. Analyzing the quality of national laser altimetry data is important to fill in the knowledge gap and boost the development of civilian laser altimetry technique. All the laser altimetry data in this study were processed using the rigorous geometric model. The data availability ratio and quality of the sea surface or during the side swing of the satellite was analyzed. The absolute elevation accuracy of laser footprint points was also evaluated using high-precision referenced terrain data. The availability ratio of ZY-3 02 laser altimetry data was approximately 30%. On the flat terrain, the quality and availability were relatively better than those of other terrains, and the absolute elevation accuracy could reach 1.0 m on flat terrains. The ZY-3 02 satellite laser altimeter can obtain efficient laser data during the on-orbit experiment, and the total availability is not high. However, it is relatively better at night and on flat regions. Intrinsic ranging error and attitude measurement error are the main sources of satellite laser elevation accuracy. The conclusion may be useful for the future national satellite laser altimeter.

palabra clave

remote sensing;satellite laser altimetry;ZY-3 02;data processing;quality analysis;satellite side-scanning;night observation

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