Guoyuan Li, Jinquan Guo, Jie Chen, Jiyi Chen, Zhao Liu, Mingyuan Peng, Xiaoping Pang. Terrestrial Ecosystem Carbon Monitoring Satellite Laser Elevation Control Point Extraction and Accuracy Verification[J]. Acta Optica Sinica, 2025, 45(6): 0628007
- Acta Optica Sinica
- Vol. 45, Issue 6, 0628007 (2025)
Fig. 1. Pulse width of transmit waveform. (a) Fixed gain; (b) variable gain
Fig. 2. Background noise of transmit waveform. (a) Fixed gain; (b) variable gain
Fig. 3. SNR of transmit waveform. (a) Fixed gain; (b) variable gain
Fig. 4. Background noise of echo waveform. (a) Fixed gain; (b) variable gain
Fig. 5. SNR of echo waveform. (a) Fixed gain; (b) variable gain
Fig. 6. Experimental process of laser elevation control point extraction and verification
Fig. 7. Schematic diagram of saturated waveform
Fig. 8. Low SNR echo waveform
Fig. 9. Schematic diagrams of laser error distribution of Shenyang area. (a) All laser altimetry data; (b) laser elevation control points
Fig. 10. Schematic diagrams of laser error distribution of PA area. (a) All laser altimetry data; (b) laser elevation control points
Fig. 11. Laser data affected by thick clouds. (a) Multi-spectral image; (b) footprint image; (c) waveform data
Fig. 12. Saturation laser altimetry data of building area. (a) Multi-spectral image; (b) footprint image; (c) waveform data
Fig. 13. Saturation laser altimetry data of water area. (a) Multi-spectral image; (b) footprint image; (c) waveform data
Fig. 14. Error distributions of laser elevation control points with different ECP flags in Shenyang area. (a) ECP flag is 1; (b) ECP flag is 2; (c) ECP flag is 3
Fig. 15. Error distributions of laser elevation control points with different ECP flags in PA area. (a) ECP flag is 1; (b) ECP flag is 2; (c) ECP flag is 3
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Table 1. Statistics of pulse width of echo waveform in Chagan Lake area
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Table 2. Statistics of differences in pulse width of echo waveform and transmit waveform in Chagan Lake area
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Table 3. Elevation accuracy verification results of Shenyang
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Table 4. Elevation accuracy verification results of PA
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Table 5. Analysis of the influence of screening parameters
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Table 6. Comparison of DSM accuracy with and without laser elevation control points
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