Analysis of Atmospheric Detection Algorithm by Photon-Counting Laser Altimeter Satellite

Jiaqi Yao; Haoran Zhai; Ren Liu; Hong Zhu; Liuru Hu; Xinming Tang

doi:10.3788/LOP202259.2228002

Laser & Optoelectronics Progress, Volume. 59, Issue 22, 2228002(2022)

Analysis of Atmospheric Detection Algorithm by Photon-Counting Laser Altimeter Satellite

Jiaqi Yao^1,2, Haoran Zhai^2,3、*, Ren Liu^2,4, Hong Zhu⁵, Liuru Hu⁶, and Xinming Tang^1,2,4

Author Affiliations

¹College of Geomrtics, Shandong University of Science and Technology, Qingdao 266590, Shandong, China

²Land Satellite Remote Sensing Application Center, Ministry of Natural Resources of P.R.China, Beijing 100048, China

³College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China

⁴School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, Jiangsu, China

⁵College of Ecology and Environment, Institute of Disaster Prevention, Langfang 065201, Hebei, China

⁶The First Topographic Surveying Brigade, Ministry of Natural Resources of P.R.China, Xi'an 710054, Shaanxi, China

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Figures & Tables(11)

Fig. 1. Three working modes of CATS satellite

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Fig. 2. Distribution of laser points on ICESat-2 satellite^[17]

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Fig. 3. Production flow chart of ATL04, ATL09

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Fig. 4. Atmospheric detection algorithm of CATS

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Fig. 5. Classification algorithm for cloud, aerosol in CATS data

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Fig. 6. Flow chart of DDA algorithm

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Fig. 7. Data distribution in experimental area

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Fig. 8. Error analysis of experimental data.

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Table 1. Parameters of CATS satellite

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Table 1. Parameters of CATS satellite

Project	Value
Wavelength of laser 1 /nm	5321064
Repetition frequency of laser 1 /Hz	5000
Output energy of laser 1 /mJ	~1
Wavelength of laser 2 /nm	3555321064
Repetition frequency of laser 2 /Hz	4000
Output energy of laser 2 /mJ	~2
The time of starting work	2015.01
Aperture of telescope /cm	60
Inclined angle of laser emission /（°）	0.5
Receiving field of view /μrad	110
Orbit inclination /（°）	51
Orbit height /km	405
Atmospheric vertical resolution /m	60
Atmospheric horizontal resolution /m	350

Table 2. Parameters of ICESat-2 satellite

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Table 2. Parameters of ICESat-2 satellite

Project	Value
Orbit height /km	500
Orbit inclination /（°）	92
Orbit type	Non-solar synchronization
Orbital period /d	91
Time of starting work	2018.09
Wavelength /nm	532
Number of beams	6
Repetition frequency of laser /Hz	10000
Laser spot diameter /m	~17
Output energy of laser /mJ	Strong beam：0.17 Weak beam：0.04
Distance between spots /km	Along-track：0.09 Cross-track（strong beam and Strong beam）：3.3 Cross-track（strong beam and weak beam）：2.5
Repetition period /d	91
Elevation measurement accuracy /m	0.1
Atmospheric vertical resolution /m	30
Atmospheric horizontal resolution /m	280

Table 3. Atmospheric hierarchical classification based on CAD index
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Table 3. Atmospheric hierarchical classification based on CAD index
Layer type CAD
Cloud 1-10
Aerosol -10--1
Uncertain data 0
Invalid data -999

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Jiaqi Yao, Haoran Zhai, Ren Liu, Hong Zhu, Liuru Hu, Xinming Tang. Analysis of Atmospheric Detection Algorithm by Photon-Counting Laser Altimeter Satellite[J]. Laser & Optoelectronics Progress, 2022, 59(22): 2228002

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