|Table of Contents|

Combined Adjustment for GF-14 Satellite Stereo Imagery and ICESat-2 Laser Altimetry Data(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2024年第06期
Page:
843-852
Research Field:
大地测量、遥感与地学大数据
Publishing date:

Info

Title:
Combined Adjustment for GF-14 Satellite Stereo Imagery and ICESat-2 Laser Altimetry Data
Author(s):
YANG Miao-miao1; 2*;  SHANG Da-shuai1; 2; 3;  GAO Xue-mei1;  TONG Fu-rong1
(1. 61363 Troops of Chinese People’s Liberation Army, Xi’an 710054, Shaanxi, China; 2. Geospatial Information College, Information Engineering University, Zhengzhou 450001, Henan, China; 3. Key Laboratory of Smart Earth, Xi’an 710054, Shaanxi, China)
Keywords:
combined adjustment;  stereo imagery;  GF-14 satellite;  ICESat-2 satellite;  elevation control point;  data registration;  elevation check point;  rational function model
PACS:
P237
DOI:
10.19814/j.jese.2024.07013
Abstract:
GF-14 is currently one of the satellites with the highest surveying and mapping accuracy in China. To further improve elevation accuracy of GF-14 satellite, it was combined with ICESat-2 laser altimetry data, which has obvious advantages in elevation measurement accuracy. Based on the preliminary screening of ICESat-2 laser altimetry data using various laser attribute information, a combined adjustment strategy was designed by introducing elevation check points, which refined the application of laser elevation control points, resolved the registration issues between the stereo image data and laser altimetry data, and obtained the high-precision 3D information of the target during the combined adjustment process. Then, the strategy was performed and analyzed using two experimental areas. In the experiments, the elevation root mean square error(RMSE)of processed stereo images in two areas was better than 1 m. The results show that the developed strategy effectively addresses the challenges of elevation control point selection and data registration in the combined adjustment process, which significantly enhances the elevation accuracy. Therefore, the proposed combined adjustment strategy can support the project of the global 1:10 000 mapping without ground control points, and promote the application of GF-14 satellite and ICESat-2 laser altimetry data in land surface surveying and mapping.

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Last Update: 2024-12-15