Processing and preliminary accuracy validation of the GF-7 satellite laser altimetry data
GF-7 satellite is equipped with the first full waveform laser altimeter of China for earth observation, which is mainly used to obtain sparse elevation control points on the ground, and ultimately improve the stereo mapping accuracy of stereo images without ground control points. The laser altimetry...
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Surveying and Mapping Press
2021
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oai:doaj.org-article:27972c0a86f9409ea04a5ca92afdc0f62021-11-12T02:25:59ZProcessing and preliminary accuracy validation of the GF-7 satellite laser altimetry data1001-159510.11947/j.AGCS.2021.20210025https://doaj.org/article/27972c0a86f9409ea04a5ca92afdc0f62021-10-01T00:00:00Zhttp://xb.sinomaps.com/article/2021/1001-1595/2021-10-1338.htmhttps://doaj.org/toc/1001-1595GF-7 satellite is equipped with the first full waveform laser altimeter of China for earth observation, which is mainly used to obtain sparse elevation control points on the ground, and ultimately improve the stereo mapping accuracy of stereo images without ground control points. The laser altimetry standardization processing of GF-7 satellite is the key step of surveying and mapping application, and the generated laser altimetry standard products are the important premise of subsequent distribution and application. Based on the GF-7 satellite laser altimetry data, this paper studies the method of laser altimetry data processing, and preliminarily validates the geometric accuracy of laser altimetry standard products. Three regions are selected to validate the accuracy of GF-7 satellite laser altimetry standard products, which contain the domestic geometric calibration area, Huayin of Shaanxi province, North Rhine-Westphalia of Germany. The results show that the planimetric accuracy of laser altimetry standard products SLA03 in calibration area is (3.896±1.029)m and (3.286±0.337)m, and elevation accuracy is (0.018±0.099)m,(-0.017±0.096)m in respectively for the two-beam lasers. Moreover, the elevation control point quality control parameter ECP_Flag can effectively identify the laser points that can be used for elevation control. The overall accuracy of Shaanxi Huayin area is (-0.113±2.519)m and (0.191±1.071)m, respectively for the two beams. The elevation accuracy of laser points marked with ECP_Flag=1 is (0.111±0.152)m and (-0.064±0.115)m. The overall accuracy of Norwich in Germany is (-0.897±5.485)m and (-0.202 ±6.207)m, and the elevation accuracy of laser points marked with ECP_Flag=1 is (-0.304±0.190)m and (-0.279±0.220)m, respectively for the two beams. At present, the laser altimetry standard products of GF-7 satellite have been daily produced in the Land Satellite Application Center of the Ministry of Natural Resources.LI GuoyuanTANG XinmingCHEN JiyiYAO JiaqiLIU ZhaoGAO XiaomingZUO ZhiqiangZHOU XiaoqingSurveying and Mapping Pressarticlegf-7 satellitesatellite laser altimetrystandard productaccuracy validationelevation control pointMathematical geography. CartographyGA1-1776ZHActa Geodaetica et Cartographica Sinica, Vol 50, Iss 10, Pp 1338-1348 (2021) |
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gf-7 satellite satellite laser altimetry standard product accuracy validation elevation control point Mathematical geography. Cartography GA1-1776 |
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gf-7 satellite satellite laser altimetry standard product accuracy validation elevation control point Mathematical geography. Cartography GA1-1776 LI Guoyuan TANG Xinming CHEN Jiyi YAO Jiaqi LIU Zhao GAO Xiaoming ZUO Zhiqiang ZHOU Xiaoqing Processing and preliminary accuracy validation of the GF-7 satellite laser altimetry data |
| description |
GF-7 satellite is equipped with the first full waveform laser altimeter of China for earth observation, which is mainly used to obtain sparse elevation control points on the ground, and ultimately improve the stereo mapping accuracy of stereo images without ground control points. The laser altimetry standardization processing of GF-7 satellite is the key step of surveying and mapping application, and the generated laser altimetry standard products are the important premise of subsequent distribution and application. Based on the GF-7 satellite laser altimetry data, this paper studies the method of laser altimetry data processing, and preliminarily validates the geometric accuracy of laser altimetry standard products. Three regions are selected to validate the accuracy of GF-7 satellite laser altimetry standard products, which contain the domestic geometric calibration area, Huayin of Shaanxi province, North Rhine-Westphalia of Germany. The results show that the planimetric accuracy of laser altimetry standard products SLA03 in calibration area is (3.896±1.029)m and (3.286±0.337)m, and elevation accuracy is (0.018±0.099)m,(-0.017±0.096)m in respectively for the two-beam lasers. Moreover, the elevation control point quality control parameter ECP_Flag can effectively identify the laser points that can be used for elevation control. The overall accuracy of Shaanxi Huayin area is (-0.113±2.519)m and (0.191±1.071)m, respectively for the two beams. The elevation accuracy of laser points marked with ECP_Flag=1 is (0.111±0.152)m and (-0.064±0.115)m. The overall accuracy of Norwich in Germany is (-0.897±5.485)m and (-0.202 ±6.207)m, and the elevation accuracy of laser points marked with ECP_Flag=1 is (-0.304±0.190)m and (-0.279±0.220)m, respectively for the two beams. At present, the laser altimetry standard products of GF-7 satellite have been daily produced in the Land Satellite Application Center of the Ministry of Natural Resources. |
| format |
article |
| author |
LI Guoyuan TANG Xinming CHEN Jiyi YAO Jiaqi LIU Zhao GAO Xiaoming ZUO Zhiqiang ZHOU Xiaoqing |
| author_facet |
LI Guoyuan TANG Xinming CHEN Jiyi YAO Jiaqi LIU Zhao GAO Xiaoming ZUO Zhiqiang ZHOU Xiaoqing |
| author_sort |
LI Guoyuan |
| title |
Processing and preliminary accuracy validation of the GF-7 satellite laser altimetry data |
| title_short |
Processing and preliminary accuracy validation of the GF-7 satellite laser altimetry data |
| title_full |
Processing and preliminary accuracy validation of the GF-7 satellite laser altimetry data |
| title_fullStr |
Processing and preliminary accuracy validation of the GF-7 satellite laser altimetry data |
| title_full_unstemmed |
Processing and preliminary accuracy validation of the GF-7 satellite laser altimetry data |
| title_sort |
processing and preliminary accuracy validation of the gf-7 satellite laser altimetry data |
| publisher |
Surveying and Mapping Press |
| publishDate |
2021 |
| url |
https://doaj.org/article/27972c0a86f9409ea04a5ca92afdc0f6 |
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