2019
DOI: 10.1016/j.rse.2019.111352
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Land ice height-retrieval algorithm for NASA's ICESat-2 photon-counting laser altimeter

Abstract: The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) and its sole scientific instrument, the Advanced Topographic Laser Altimeter System (ATLAS), was launched on 15 September 2018 with a primary goal of measuring changes in the surface of the Earth's land ice (glaciers and ice sheets). ATLAS is a photon-counting laser altimeter, which records the transit time of individual photons in order to reconstruct surface height along track. The ground-track pattern repeats every 91 days such that changes in ice sh… Show more

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Cited by 168 publications
(167 citation statements)
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“…The surface roughness of polar ice sheets is primarily a result of ice dynamics and surface-atmosphere interactions on varying temporal and spatial scales. In general, ice flow over rugged bedrock topography causes roughness features that can extend from several hundreds of kilometers to a few kilometers depending on ice thickness, flow speed, and basal conditions (e.g., Smith et al, 2006, and references therein). These large-scale variations in ice surface topography caused by ice dynamics are not the topic of this analysis.…”
Section: Introductionmentioning
confidence: 99%
“…The surface roughness of polar ice sheets is primarily a result of ice dynamics and surface-atmosphere interactions on varying temporal and spatial scales. In general, ice flow over rugged bedrock topography causes roughness features that can extend from several hundreds of kilometers to a few kilometers depending on ice thickness, flow speed, and basal conditions (e.g., Smith et al, 2006, and references therein). These large-scale variations in ice surface topography caused by ice dynamics are not the topic of this analysis.…”
Section: Introductionmentioning
confidence: 99%
“…Hence, to eliminate the influence of single reference data on the validation results, high-precision altimetry data points from Ice, Cloud, and and Elevation Satellite-2 or ICESat-2 were adopted to further verify the accuracy of the derived DEM. These data are accurate enough to be used as ground control points (GCPs) for assessing the InSAR DEMs [24][25][26][27]. The blue dots in Figure 2 (3784 GCPs) and Figure 7 (7269 GCPs) are the ATL08 land data products collected by ICESat-2.…”
Section: Reference Elevation Datamentioning
confidence: 99%
“…The ATL06 elevation measurements are derived from the individual photon elevation observations, averaged over a 40 m length segment. The segments overlap by 50% along each of the six ground tracks, thus the ATL06 elevation measurements are separated by 20 m along each ground track (Smith et al 2019). Five cycles exist during the study period but only cycles 3, 4 and 5 are exact repeat cycles.…”
Section: Icesat-datamentioning
confidence: 99%