Laser & Optoelectronics Progress, Volume. 62, Issue 1, 0101001(2025)
Impulse Response of ICESat-2 Satellite LiDAR System and Inversion Study of Ocean Optical Parameters
Figures & Tables(12)
Fig. 1. ATLAS nighttime data for the Atlantic and the Uyuni Salt Marsh region. (a) Atlantic photon point cloud; (b) Atlantic histogram of photon event accumulation; (c) Uyuni salt marsh region photon point cloud; (d) Uyuni salt marsh region histogram of photon event accumulation
Fig. 2. Accumulation histogram of photon events on different surfaces. (a) Accumulation of ground experiment data; (b) accumulation of on-orbit ocean data; (c) accumulation of on-orbit salt marsh data; (d) accumulation of on-orbit desert data
Fig. 3. Theoretical values of pulse broadening of ATLAS system for different surface roughness and surface slope
Fig. 5. Uyuni salt marsh data and its quality control results. (a) Initial point cloud data of Uyuni salt marsh; (b) quality control results
Fig. 6. Comparison results of Uyuni salt marsh ATL03 data before and after peak alignment and its profile signal. (a) Photon point cloud without peak alignment; (b) accumulation histogram without peak alignment; (c) photon point cloud after peak alignment; (d) accumulation histogram after peak alignment
Fig. 7. Comparison result of system impulse response function. (a) System impulse response function of system established after quality control; (b) system impulse response function of system established directly
Fig. 8. Comparison of bbp inversion results in the Black Sea area based on different system impulse response functions. (a) SIRg; (b) SIRqcs; (c) SIRqcd; (d) SIRqus; (e) SIRqud
Fig. 9. Comparison of bb and bbp inversion results for Black Sea area. (a) Inversion results of bbp; (b) inversion results of bb
Table 1. Comparison of relative positions and relative intensities of AP1, AP2, and AP0
View tableTable 1. Comparison of relative positions and relative intensities of AP1, AP2, and AP0
Surface type POSAP1 /ns POSAP2 /ns AP1 /AP0 AP2 /AP0 σAP0 Test hard target 15.47 27.91 1.300×10-3 7.600×10-4 6.100×10-2 Ocean 15.35 27.85 2.455×10-3 1.405×10-3 2.452×10-1 Salt marsh 15.45 27.75 1.226×10-3 7.933×10-4 1.250×10-1 Desert 15.50 27.70 1.368×10-3 8.521×10-4 2.334×10-1
Table 2. Parameter fitting results for ex-Gaussian distribution
View tableTable 2. Parameter fitting results for ex-Gaussian distribution
Parameter SIRqcs SIRqus SIRqcd SIRqud SIRg μ -0.023 -0.035 -0.024 -0.044 -0.127 σ 0.087 0.095 0.089 0.142 0.061 τ 0.135 0.149 0.139 0.148 0.113 Δμ1 14.71 14.76 15.10 14.96 15.47 Δμ2 28.08 28.17 28.20 28.60 27.91
Table 3. Comparison of inversion results of corrected impulse response function of system built with different data
View tableTable 3. Comparison of inversion results of corrected impulse response function of system built with different data
Response function bbp /% bb /% SIRg BGC-Argo SIRg MODIS SIRqcd Beam 1 22.5 66.2 43.5 42.3 SIRqcd Beam 3 26.3 71.3 36.8 48.5 SIRqcd Beam 5 19.2 70.5 44.3 39.3 SIRqcs Beam 1 18.3 66.5 40.0 38.2 SIRqus Beam 1 84.7 156.5 133.7 121.2 SIRqud Beam 1 112.6 188.0 158.6 150.3
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Zheng Zhao, Zhiyu Zhang, Songhua Wu. Impulse Response of ICESat-2 Satellite LiDAR System and Inversion Study of Ocean Optical Parameters[J]. Laser & Optoelectronics Progress, 2025, 62(1): 0101001
Paper Information
Category: Atmospheric Optics and Oceanic Optics
Received: Jan. 31, 2024
Accepted: Apr. 28, 2024
Published Online: Jan. 9, 2025
The Author Email:
CSTR:32186.14.LOP241108
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