摘要
南极冰盖DEM在南极研究中具有十分重要的作用,而构建南极冰盖DEM的主要数据源来自于卫星测高。在已有的测高卫星数据中,ERS-1/GM和ICESAT在空间分辨率和精度方面存在互补关系,综合利用这两类数据,是获得南极冰盖高分辨率高精度DEM的前提。本文采用了数据联合的方法,利用ERS-1和ICESAT测高数据来构建南极冰盖DEM。采用ICESAT离散数据和RAMP/DEM v2对综合DEM进行精度评估,结果表明综合DEM高程精度在4 m左右。
Digital Elevation Models （DEMs） of the Antarctic ice sheet play a very important role in Antarctic research, and the main data source for constructing an Antarctic DEM is satellite altimetry. Among these data, ERS-1/GM has a complementary relationship with ICESAT in spatial resolution and accuracy, and the premise here is to obtain high resolution and high accuracy through a combination of these two types of data. This paper presents an approach to such a combination, which was used to construct an Antarctic DEM. Finally, ICESAT discrete data and RAMP/ DEM v2 were used to evaluate accuracy of the integrated DEM. Results show that elevation accuracy of the integrat- ed DEM is about 4 m.
出处
《极地研究》
CAS
CSCD
北大核心
2013年第3期211-217,共7页
Chinese Journal of Polar Research
基金
国家高技术研究发展计划(863计划)重大项目(2012AA12A304-20)
国家海洋局极地专项"南北极环境综合考察与评估"
国家自然科学基金(41174029
41106163)
国家海洋局极地科学重点实验室开放研究基金(KP201102)
武汉大学中央高校基本科研业务经费专项资金项目(111165)资助
