Name
Title | ||
|---|---|---|
Determination of Local Slope on the Greenland Ice Sheet Using a Multibeam Photon-Counting Lidar in Preparation for the ICESat-2 Mission |
Abstract | ||
|---|---|---|
The greatest changes in elevation in Greenland and Antarctica are happening along the margins of the ice sheets where the surface frequently has significant slopes. For this reason, the upcoming Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) mission utilizes pairs of laser altimeter beams that are perpendicular to the flight direction in order to extract slope information in addition to elevation. The Multiple Altimeter Beam Experimental Lidar (MABEL) is a high-altitude airborne laser altimeter designed as a simulator for ICESat-2. The MABEL design uses multiple beams at fixed angles and allows for local slope determination. Here, we present local slopes as determined by MABEL and compare them to those determined by the Airborne Topographic Mapper (ATM) over the same flight lines in Greenland. We make these comparisons with consideration for the planned ICESat-2 beam geometry. Results indicate that the mean slope residuals between MABEL and ATM remain small ( 0.05 °) through a wide range of localized slopes using ICESat-2 beam geometry. Furthermore, when MABEL data are subsampled by a factor of 4 to mimic the planned ICESat-2 transmit-energy configuration, the results are indistinguishable from the full-data-rate analysis. Results from MABEL suggest that ICESat-2 beam geometry and transmit-energy configuration are appropriate for the determination of slope on ~ 90-m spatial scales, a measurement that will be fundamental to deconvolving the effects of surface slope from the ice-sheet surface change derived from ICESat-2. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/LGRS.2013.2282217 | Geoscience and Remote Sensing Letters, IEEE |
Keywords | Field | DocType |
ice,optical radar,photon counting,remote sensing by laser beam,terrain mapping,ATM,Airborne Topographic Mapper,Antarctica,Greenland ice sheet,ICESat-2 Mission,Ice, Cloud, and land Elevation Satellite-2,MABEL,Multiple Altimeter Beam Experimental Lidar,flight direction,full-data-rate analysis,high-altitude airborne laser altimeter,ice sheets,laser altimeter beams,local slope determination,multibeam photon-counting lidar,slope information,transmit-energy configuration,Airborne lidar,laser altimetry,photon counting | Sea ice,Altimeter,Topographic map,Greenland ice sheet,Remote sensing,Ice sheet,Lidar,Beam (structure),Elevation,Geodesy,Mathematics | Journal |
Volume | Issue | ISSN |
11 | 5 | 1545-598X |
Citations | PageRank | References |
3 | 0.45 | 2 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Kelly M. Brunt | 1 | 8 | 2.20 |
| Thomas A. Neumann | 2 | 5 | 1.62 |
| Kaitlin M. Walsh | 3 | 3 | 0.45 |
| T. Markus | 4 | 188 | 45.80 |