Obtaining high-precision digital elevation model in Antarctica based on TanDEM-X images and ICESat-2 data

doi:10.13474/j.cnki.11-2246.2022.0113

Abstract

Abstract: High-precision digital elevation model (DEM) is one of the basic geographic information data required for Antarctica scientific research. The TanDEM-X bistatic SAR pairs released by the German Space Agency has the advantages of high-resolution and wide coverage. More importantly, it has a zero temporal baseline, which makes them to be free of time decorrelation, atmospheric variation, and ground deformation. In this paper, we firstly use TanDEM-X images and the iterative differential InSAR technology to obtain high-resolution Antarctic DEM,and then improve the accuracy of the DEM products by correcting the horizontal shift based on the ICESat-2 data and least squares adjustment technology. The research results show that the method can obtain Antarctica DEM with resolution higher than 5 m and absolute precision better than 2 m.

Key words: Antarctica, digital elevation model, TanDEM-X, D-InSAR, ICESat-2

CLC Number:

P228

LIU Zhuo, LI Jia, ZHANG Xiang, GUO Lei, LIU Yanyang, XU Haodong, GU Yunyang, CHEN Chonghua. Obtaining high-precision digital elevation model in Antarctica based on TanDEM-X images and ICESat-2 data[J]. Bulletin of Surveying and Mapping, 2022, 0(4): 72-76.

References 17

[1]	万雷, 周春霞, 鄂栋臣, 等. 基于InSAR和ICESat的南极冰盖地区DEM提取和精度分析[J]. 冰川冻土, 2015, 37(5):1160-1167.
[2]	王泽民, 熊云琪, 杨元德, 等. 联合ERS-1和ICESAT卫星测高数据构建南极冰盖DEM[J]. 极地研究, 2013, 25(3):211-217.
[3]	FRETWELL P, PRITCHARD H D, VAUGHAN D G, et al. Bedmap2:improved ice bed, surface and thickness datasets for Antarctica[J]. The Cryosphere, 2013, 7(1):375-393.
[4]	KIM S H, KIM D J. Measurements of surface deformation of ice sheets in Antarctica using TanDEM-X data[C]//Proceedings of 2013 Asia-Pacific Conference on Synthetic Aperture Radar (APSAR). Tsukuba:IEEE, 2013:177-180.
[5]	GRIGGS J A, BAMBER J L. A new 1 km digital elevation model of Antarctica derived from combined radar and laserdata-part 2:validation and error estimates[J]. The Cryosphere, 2009, 3(1):113-123.
[6]	黄科伟, 李斐, 张胜凯, 等. 南极冰盖DEM机载测高验证与分析:以西南极Thwaites冰川为例[J]. 测绘学报, 2016, 45(5):544-551.
[7]	GROH A, EWERT H, ROSENAU R, et al. Mass, volume and velocity of the Antarctic ice sheet:present-day changes and error effects[J]. Surveys in Geophysics, 2014, 35(6):1481-1505.
[8]	WESSEL B, BERTRAM A, GRUBER A, et al. A new high-resolution elevation model of greenland derived from TanDEM-X[J]. Remote Sensing and Spatial Information Sciences, 2016,Ⅲ7:9-16.
[9]	LI J, LI Z W, HU J, et al. Investigating the bias of TanDEM-X digital elevation models of glaciers on the Tibetan Plateau:impacting factors and potential effects on geodetic mass-balance measurements[J]. Journal of Glaciology, 2021:1-14.
[10]	LUGLI A,VITTUARI L.A polarimetric analysis of COSMO-SkyMed and RADARSAT-2 offset tracking derived velocities of David-Drygalski Glacier (Antarctica)[J].Applied Geomatics, 2017, 9(1):43-52.
[11]	杜亚男, 冯光财, 李志伟, 等. TerraSAR-X/TanDEM-X获取高精度数字高程模型技术研究[J]. 地球物理学报, 2015, 58(9):3089-3102.
[12]	SOERGEL U, JACOBSEN K, SCHACK L. TanDEM-X mission:overview and evaluation of intermediate results[J]. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013, XL-7/W2:225-230.
[13]	RIZZOLI P, MARTONE M, ROTT H, et al. Characterization of snow facies on the Greenland ice sheet observed by TanDEM-X interferometric SAR data[J]. Remote Sensing, 2017, 9(4):315.
[14]	NAGLER T, ROTT H. Retrieval of wet snow by means of multitemporal SAR data[J]. IEEE Transactions on Geoscience and Remote Sensing, 2000, 38(2):754-765.
[15]	DAMMANN D O,ERIKSSON L E B,NGHIEM S V,et al. Iceberg topography and volume classification using TanDEM-X interferometry[J]. The Cryosphere, 2019, 13(7):1861-1875.
[16]	KAAB A. Glacier volume changes using ASTER satellite stereo and ICESat GLAS laser altimetry. a test study on Edgeøya, eastern Svalbard[J]. IEEE Transactions on Geoscience and Remote Sensing, 2008, 46(10):2823-2830.
[17]	LI Zhiwei, LI Jia, DING Xiaoli, et al. Anomalous glacier changes in the southeast of Tuomuer-khan Tengri Mountain Ranges, central Tianshan[J]. Journal of Geophysical Research:Atmospheres, 2018, 123(13):6840-6863.