Infrared and Laser Engineering, Volume. 51, Issue 1, 20210836(2022)
Parameter extraction method on the multiple mode waveforms of satellite laser altimeter(Invited)
Figures & Tables(16)
Fig. 2. Sketch map of extracting the peak positions and numbers of the target response waveform (TRW) based on the boosted RL deconvolution method
Fig. 3. Location of the study site and data trajectories of the GEDI and airborne lidar
Fig. 4. Prescribed parameter distributions of the known-parameter TRW and an example of the TRW
Fig. 5. Decomposed results of the received waveform by the DRET and DGDL methods
Fig. 6. The processed results of the known-parameter waveform data set obtained by the DRET and DGDL methods
Fig. 7. Extracted errors of the waveform parameters and the successful detection rates of the component numbers by the DRET and DGDL methods
Fig. 8. Decomposition results of airborne simulation data by the DRET and DGDL methods
Fig. 9. Decomposition results of the GEDI data by the DRET and DGDL methods
Fig. 11. Distributions of the canopy height errors under different tree heights
Table 1. Parameter setting of known-parameter waveform data set
View tableView in ArticleTable 1. Parameter setting of known-parameter waveform data set
Source Amplitude/V Peak position/ns Pulse width/ns System response 1 20 15.6 Target response 0.2-1 300-400 5-15
Table 2. Detailed waveform parameters and evaluation indicators of the results extracted by the two methods
View tableView in ArticleTable 2. Detailed waveform parameters and evaluation indicators of the results extracted by the two methods
Method Component I u b a Evaluation criterion $ {C}_{x} $ $ {\delta }_{x} $ $ {\tau }_{I} $ $ {\tau }_{u} $ $ {\tau }_{b} $ 1此处NA表示DGDL方法中不存在偏度系数。 2此处NA表示该分量为错误分量，无法计算对应的参数误差。 DRET 1 0.69 345.05 7.58 0.01 0.99 1.37 1.42% 0.05% 3.69% 2 0.51 366.26 10.43 0.05 2.00% 0.74% 2.52% DGDL 1 0.61 343.89 7.16 NA 1 0.97 2.63 12.86% 2.11% 8.34% 2 0.22 361.21 15.02 NA 1 NA 2 NA 2 NA 2 3 0.31 368.55 10.98 NA 1 18.97% 2.31% 6.22%
Table 3. Average value of the evaluation indexes of the two methods
View tableView in ArticleTable 3. Average value of the evaluation indexes of the two methods
Evaluation index DRET DGDL $ {C}_{x} $ 0.987 0.966 $ {\delta }_{x} $ 1.217 2.305 $ {\tau }_{I} $ 2.18% 7.56% $ {\tau }_{u} $ 0.52% 3.69% $ {\tau }_{b} $ 2.33% 6.47% $ {r}_{s} $ 98.70% 64.25%
Table 4. Correlation coefficient (
Table 4. Correlation coefficient (
Evaluation index DRET DGDL $ {C}_{x} $ Max 0.999 0.991 Min 0.937 0.872 Average 0.995 0.986 Standard deviation 0.012 0.034 $ {\delta }_{x} $ Max 9.326 14.273 Min 0.607 1.988 Average 1.869 3.516 Standard deviation 1.291 2.936
Table 5. Correlation coefficient (
Table 5. Correlation coefficient (
Evaluation index DRET DGDL $ {C}_{x} $ Max 0.999 0.982 Min 0.939 0.854 Average 0.993 0.977 Standard deviation 0.037 0.062 $ {\delta }_{x} $ Max 9.412 15.504 Min 0.449 3.075 Average 1.953 4.248 Standard deviation 1.363 3.712
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Tianhao Zhu, Hui Zhou, Yan Shi, Qianyin Zhang. Parameter extraction method on the multiple mode waveforms of satellite laser altimeter(Invited)[J]. Infrared and Laser Engineering, 2022, 51(1): 20210836
Paper Information
Category: Lasers & Laser optics
Received: Nov. 10, 2021
Accepted: --
Published Online: Mar. 8, 2022
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