THRESHOLD DETERMINATION FOR LOCAL INSTANTANEOUS SEA SURFACE HEIGHT DERIVATION WITH ICEBRIDGE DATA IN BEAUFORT SEA
The NASA Operation IceBridge(OIB)mission is the largest program in the Earths polar remote sensing science observation project currently,initiated in 2009,which collects airborne remote sensing measurements to bridge the gap between NASAs ICESat and the upcoming ICESat-2 mission.This paper develop an improved method that optimizing the selection method of Digital Mapping System(DMS)image and using the optimal threshold obtained by experiments in Beaufort Sea to calculate the local instantaneous sea surface height in this area.The optimal threshold determined by comparing manual selection with the lowest(Airborne Topographic Mapper)ATM L1B elevation threshold of 2%,1%,0.5%,0.2%,0.1%and 0.05%in A,B,C sections,the mean of mean difference are 0:166m,0:124m,0:083m,0:018m,0:002m and -0.034m.Our study shows the lowest L1B data of 0.1%is the optimal threshold.The optimal threshold and manual selections are also used to calculate the instantaneous sea surface height over images with leads,we find that improved methods has closer agreement with those from L1B manual selections.For these images without leads,the local instantaneous sea surface height estimated by using the linear equations between distance and sea surface height calculated over images with leads.
IceBridge optimal threshold Sea surface reference Beaufort sea
Chaohui Zhu Shengkai Zhang Feng Xiao Jiaxing Li Lexian Yuan Yu Zhang Tingting Zhu
Chinese Antarctic Center of Surveying and Mapping,Wuhan University,Wuhan,430079,China State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing(LIESMARS),Wu
国际会议
北京
英文
2579-2582
2018-05-07（万方平台首次上网日期，不代表论文的发表时间）