[1] Khan S A, Kjær K H, Bevis M, et al. Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming[J]. Nature Climate Change, 4, 292-299(2014).

[2] Markus T, Neumann T, Martino A, et al. The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2): science requirements, concept, and implementation[J]. Remote Sensing of Environment, 190, 260-273(2017).

[3] Fang Yong, Cao Bincai, Gao Li, et al. Development and application of lidar mapping satellite[J]. Infrared and Laser Engineering, 49, 20201044(2020).

[4] Zhu Xiaoxiao, Wang Cheng, Xi Xiaohuan, et al. Research progress of ICESat-2/ATLAS data processing and applications[J]. Infrared and Laser Engineering, 49, 20200259(2020).

[5] Brunt K M, Neumann T A, Smith B E. Assessment of ICESat-2 ice sheet surface heights, based on comparisons over the interior of the antarctic ice sheet[J]. Geophysical Research Letters, 46, 13072-13078(2019).

[6] Brunt K M, Neumann T A, Walsh K M, et al. Determination of local slope on the Greenland ice sheet using a multibeam photon-counting lidar in preparation for the ICESat-2 Mission[J]. IEEE Geoscience and Remote Sensing Letters, 11, 935-939(2013).

[7] Kwok R, Markus T, Kurtz N T, et al. Surface height and sea ice freeboard of the Arctic Ocean from ICESat-2: Characteristics and early results[J]. Journal of Geophysical Research: Oceans, 124, 6942-6959(2019).

[8] Dandabathula G, Verma M, Sitiraju S R. Evaluation of best-fit terrain elevation of ICESat-2 ATL08 using DGPS surveyed points[J]. Journal of Applied Geodesy, 14, 285-293(2020).

[9] Horvat C, Blanchard‐Wrigglesworth E, Petty A. Observing waves in sea ice with ICESat-2[J]. Geophysical Research Letters, 47, e2020GL087629(2020).

[10] Lu X, Hu Y, Yang Y, et al. Antarctic spring ice-edge blooms observed from space by ICESat-2[J]. Remote Sensing of Environment, 245, 111827(2020).

[11] [11] Hamamatsu Photonics. Chapter 4 acteristics of Photomultiplier Tubes in Photomultiplier Tubes Basics Applications[M]. 3rd ed. Japan: Hamamatsu Publishing, 2006.

[12] Smith B, Fricker H A, Holschuh N, et al. Land ice height-retrieval algorithm for NASA’s ICESat-2 photon-counting laser altimeter[J]. Remote Sensing of Environment, 233, 111352(2019).

[13] Kwok R, Cunningham G F, Hoffmann J, et al. Testing the ice-water discrimination and freeboard retrieval algorithms for the ICESat-2 mission[J]. Remote Sensing of Environment, 183, 13-25(2016).

[14] Neuenschwander A, Pitts K. The ATL08 land and vegetation product for the ICESat-2 Mission[J]. Remote Sensing of Environment, 221, 247-259(2019).

[15] Hu Y, Vaughan M, Liu Z, et al. The depolarization-attenuated backscatter relation: CALIPSO lidar measurements vs. theory[J]. Optics Express, 15, 5327-5332(2007).

[16] Li J, Hu Y, Huang J, et al. A new method for retrieval of the extinction coefficient of water clouds by using the tail of the CALIOP signal[J]. Atmospheric Chemistry and Physics, 11, 2903-2916(2011).

[17] [17] Lu X, Hu Y, Yang Y. Ocean subsurface study from ICESat2 mission[C]2019 Photonics & Electromagics Research SymposiumFall (PIERSFall). IEEE, 2019.

[18] Lu X, Hu Y, Trepte C, et al. Ocean subsurface studies with the CALIPSO spaceborne lidar[J]. Journal of Geophysical Research: Oceans, 119, 4305-4317(2014).