Infrared and Laser Engineering, Volume. 51, Issue 5, 20210356(2022)
Laser altimetry data processing and combined surveying application of ZY3-03 satellite
Figures & Tables(9)
Fig. 1. Diagram of ZY3-03 satellite laser altimeter based on the threshold detection and ranging
Fig. 2. The workflow of ZY3-03 satellite laser altimetry data processing
Fig. 3. Distribution of ZY3-03 satellite laser altimetry points all over the world
Fig. 5. Distribution of combined surveying data and field check points in experimental regions
Table 1. Parameters comparison between ZY3-02 and ZY3-03 satellite laser altimeter
View tableView in ArticleTable 1. Parameters comparison between ZY3-02 and ZY3-03 satellite laser altimeter
Parameter ZY3-02[ 15 ]ZY3-03 Number of beams Only one Two, one as backup Frequency/Hz 2 2 Central wavelength/nm 1 064.4 1 064.4 Pulse energy/mJ 200 150 Pulse width/ns 7 5 Divergence angle/μrad 150 90 Ground footprint size 75 m@500 km 45 m@500 km Pointing change/μrad ≤10 ≤5 Receiving aperture/mm 220 260 Total transmitted pulse >1×108 Lifetime 8 years Power consumption/W ≤50 ≤80 Weight/kg ≤40 ≤95 Terrain adaptability/(°) ≤2 ≤5 Ranging accuracy/m ≤1 ≤0.3
Table 2. Validation result of ZY3-03 laser points on Sunid Right Banner in Inner Mongolia (Unit: m)
View tableView in ArticleTable 2. Validation result of ZY3-03 laser points on Sunid Right Banner in Inner Mongolia (Unit: m)
Date ID Elevation Reference elevation Error 2020-09-08 86912108 1 007.364 1 007.218 0.146 86912110 1 052.404 1 052.183 0.221 2020-09-23 92095212 1 073.461 1 073.316 0.145 92095214 1 079.237 1 079.174 0.063 92095216 1 074.751 1 074.405 0.346 92095220 1 086.253 1 086.500 −0.247 92095222 1 094.673 1 094.992 −0.319 Statistical result Max 0.346 Min 0.051 RMSE 0.232
Table 3. Laser elevation accuracy of the No.1183 orbit on 10thOct, 2020 (Unit: m)
View tableView in ArticleTable 3. Laser elevation accuracy of the No.1183 orbit on 10thOct, 2020 (Unit: m)
ID ECP flag Elevation Reference elevation Error Remarks 97960914 1 12.453 23.52 −11.067 Roof 97960916 1 12.054 12.97 −0.916 Near the building 97960920 2 20.576 14.66 5.916 Road with vegetation 97960924 1 12.677 13.36 −0.683 Cropland 97960926 1 10.524 10.69 −0.166 Cropland 97960928 2 14.608 19.92 −5.312 Building and tree 97960930 1 11.460 12.37 −0.910 Cropland 97960932 1 9.756 9.83 −0.074 Paddy field 97960934 2 30.476 31.19 −0.714 Roof 97960936 1 9.995 10.74 −0.745 Open space 97960938 3 14.560 11.75 2.810 Vegetation 97960940 2 11.699 9.97 1.729 Trees 97960942 1 10.525 11.15 −0.625 Cropland 97960944 2 31.953 12.52 19.433 Construction site 97960950 2 116.315 118.29 −1.975 Building 97960952 1 30.225 30.31 −0.085 Grassland
Table 4. Statistics result of different adjustment in the experimental regions
View tableView in ArticleTable 4. Statistics result of different adjustment in the experimental regions
Region Group Laser elevation control point Horizontal control point Ground control point Check point RMS of check point/m Horizontal Elevation Taihang mountain A 0 0 0 115 26.99 11.25 B 0 0 9 106 5.98 3.32 C 6 0 0 115 27.43 4.45 D 6 9 0 106 5.97 4.31 Heilongjiang flat A 0 0 0 270 15.26 5.27 B 0 0 9 256 4.99 2.41 C 91 0 0 270 15.35 2.58 D 91 9 0 256 5.04 2.56
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Guoyuan Li, Xinming Tang, Ping Zhou, Jiyi Chen, Zhao Liu, Xianhui Dou, Xiaoqing Zhou, Xia Wang. Laser altimetry data processing and combined surveying application of ZY3-03 satellite[J]. Infrared and Laser Engineering, 2022, 51(5): 20210356
Paper Information
Category: Image processing
Received: Nov. 10, 2021
Accepted: --
Published Online: Jun. 14, 2022
The Author Email: Tang Xinming (txm@lasac.cn)
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