@article{oai:nipr.repo.nii.ac.jp:00010146,
 author = {Yamanokuchi, Tsutomu and Doi, Koichiro and Shibuya, Kazuo and Yamanokuchi, Tsutomu and Doi, Koichiro and Shibuya, Kazuo},
 issue = {1},
 journal = {Polar science, Polar science},
 month = {May},
 note = {Surface elevation data for the BreivikaeAsuka Station area, East Dronning Maud Land, Antarctica, obtained during ground surveys undertaken in 1987 were compared with elevation data measured by the Geoscience Laser Altimeter System (GLAS) onboard the Ice, Cloud, and land Elevation Satellite (ICESat) in 2003. The two sets of measurements were consistent within ±12.4 m for an elevation range from 300 to 1000 m. We produced an interferometric synthetic aperture radar (InSAR) digital elevation model (DEM) with 50 m grid spacing and InSAR DEM heights were corrected using GLAS heights as ground-truth data. The height differences are assumed to have a quadratic function of rectangular polar stereographic coordinates with six coefficients, and the most probable estimate of the correction parameter set was calculated using a least squares method. Before correction, the root-mean-square (rms) height error was ±284 m; after correction, the associated error was reduced to ±22.3 m, where the absolute error in the horizontal coordinates (grids) was ±230 m. The resultant InSAR DEM height error is twice as large as the GLAS DEM height error; however, the accuracy of the resultant InSAR DEM is reasonable when we consider the limitations of single baseline InSAR and the steep slopes (range in elevation: 1000 m) within the ice sheet region. An InSAR DEM with high spatial resolution and 2 m relative accuracy in terms of yearly change is useful for monitoring ice volume (mass) change by a superconducting gravimeter., 衛星搭載のICESat/GLASレーザー高度計、及びERS-1/2を用いた干渉SARによるDEMから得られた東南極Breivika-Asuka基地間の氷床表面高を、1987年のJARE28次隊による現地観測結果と比較し、その精度を検証した。高度300mから1000mの検証区間内におけるGLASとJARE28の結果は±12.4mで一致する結果となった。
干渉SARによるDEMは観測の空間密度は高いものの、そのままでは高さ方向の誤差が大きいため、このGLASデータを誤差補正に用いる手法を新たに開発した。その手法を適用した結果、適用前にJARE28に対して±284mあった誤差が±22.3mまで減少した。この値はGLASの約2倍であるが、InSARDEMが面的にDEMを得られること、１ペアのInSAR画像しか用いていないこと、比較的急峻な地形の地域であることを考えると、妥当なものである。},
 pages = {1--17},
 title = {Combined use of InSAR and GLAS data to produce an accurate DEM of the Antarctic ice sheet: Example from the BreivikaeAsuka station area},
 volume = {4},
 year = {2010}
}