基于CryoSat-2的东南极PANDA断面考察沿线DEM制作及精度分析

发布时间：2018-04-12 12:45

  本文选题：卫星测高 + 南极　； 参考：《冰川冻土》2016年02期

【摘要】：基于卫星测高数据,国际上先后发布了ICESat DEM、Bamber DEM等全南极DEM.相对于传统高度计,大轨道倾角、长重访周期的设计使Cryo Sat-2具有更大的数据覆盖范围以及更加密集的轨道覆盖;同时,SARIn模式的启用也提高了Cryo Sat-2对于南极边缘区域的监测能力.针对利用Cryo Sat-2数据提取DEM问题,对Croy Sat-2的轨迹覆盖特征、数据滤波方法、最优内插参数选取以及DEM精度验证等方面进行了探讨,并利用克里金插值法生成了东南极PANDA断面考察沿线1 km分辨率的DEM.结果表明:通过与ICESat数据对比,发现PANDA断面考察沿线DEM整体高程精度约为(1.57±3.30)m;但是,局部区域高程精度分析表明,DEM精度具有不均一性,随着坡度的增加DEM高程精度逐渐下降,高程稳定性也同时下降.
[Abstract]:Based on the satellite altimetry data, ICESat Demm Bamber DEM has been published in the whole Antarctic.Compared with the traditional altimeter, the design of long revisiting period makes Cryo Sat-2 have more data coverage and more dense orbit coverage than traditional altimeters, and the use of Cryo Sat-2 model also improves the monitoring ability of Cryo Sat-2 to the Antarctic marginal region.Aiming at the problem of extracting DEM from Cryo Sat-2 data, the trace coverage feature, data filtering method, optimal interpolation parameter selection and DEM precision verification of Croy Sat-2 are discussed.Using the Kriging interpolation method, the 1 km resolution of the East Antarctic PANDA section is generated.The results show that by comparing with the ICESat data, it is found that the overall elevation accuracy of DEM along the PANDA section is about 1.57 卤3.30m.However, the local area elevation accuracy analysis shows that the Dem accuracy is uneven, and the accuracy of DEM elevation decreases gradually with the increase of slope.Height stability also decreases.
【作者单位】： 武汉大学中国南极测绘研究中心;极地测绘科学国家测绘地理信息局重点实验室;
【基金】：国家自然科学基金项目(41376187;41076126) 中国极地科学战略研究基金项目(20120107) 民用航天“十二五”预先研究项目(D040103) 南北极环境综合考察与评估专项(CHINARE2015-02-04)资助
【分类号】：P228.3;P208
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本文编号：1739816