基于SNAP通用架构的高分三号卫星数据转换方法研究

DATA CONVERSION METHOD FOR GAOFEN-3 SATELLITE BASED ON SNAP COMMON ARCHITECTURE

针对目前能够处理国产高分三号卫星数据的软件偏少,以商业闭源为主,授权费用昂贵等一系列问题,提出一种借助免费开源的SNAP遥感处理软件平台,利用其已集成的Sentinel-1工具箱中SAR处理工具集,实现对高分三号卫星数据进行处理的新思路。该思路实现的关键是在SNAP提供的通用架构下构建针对高分三号卫星影像数据的转换工具。通过分析SNAP核心数据数据模型、高分三号卫星数据结构和特点,设计并实现该工具的结构和功能。调用Sentinel-1工具箱对转换后数据进行极化分解和地理编码的处理测试,获得了与实际相符的结果,验证了方法的可行性,为开源技术应用于高分三号卫星数据处理提供了参考。

At present,there are few commercial remote sensing software that are compatible with GaoFen-3 satellite data.The expensive licensing costs and closed source of these software have limited the development of GaoFen-3 data application.A new idea is proposed and discussed to process the GaoFen-3 data by using a free and open source remote sensing software platform(SNAP).Its detail was to use the SAR tool set in the Sentinel-1 toolbox,which was integrated in SNAP platform,to process the GaoFen-3 data.The key to realize this idea was to build a conversion tool for GaoFen-3 data under the common architecture provided by SNAP.The product data model of SNAP core and the data structure and characteristics of GaoFen-3 were analyzed,and the structures and functions of this tool were designed and implemented.The Sentinel-1 toolbox was invoked to test the converted data for polarization decomposition and geocoding processing.The test results agreed with the realities,which verified the feasibility.The design and implementation of this conversion tool provided a reference for the application of open source technology in the data processing of GaoFen-3 satellite.