Multiple scattering of laser pulses in snow over ice: modeling the potential bias in ICESat altimetry
The primary goal of NASA’s current ICESat and future ICESat2 missions is to map the altitude of the Earth’s land ice with high accuracy using laser altimetry technology, and to measure sea ice freeboard. Ice however is a highly transparent optical medium with variable scattering and absorption prope...
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ftnasajpl:oai:trs.jpl.nasa.gov:2014/45128 2023-05-15T16:28:49+02:00 Multiple scattering of laser pulses in snow over ice: modeling the potential bias in ICESat altimetry Davis, A. B. Várnai, T. Marshak, A. 2015-04-22T16:44:53Z application/pdf http://hdl.handle.net/2014/45128 en_US eng Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2010 25th International Conference on Laser Radar (ILRC 25), St. Petersburg, Russia, July 5-9, 2010 10-2218 http://hdl.handle.net/2014/45128 Preprint 2015 ftnasajpl 2021-12-23T13:18:15Z The primary goal of NASA’s current ICESat and future ICESat2 missions is to map the altitude of the Earth’s land ice with high accuracy using laser altimetry technology, and to measure sea ice freeboard. Ice however is a highly transparent optical medium with variable scattering and absorption properties. Moreover, it is often covered by a layer of snow with varying depth and optical properties largely dependent on its age. We describe a modeling framework for estimating the potential altimetry bias caused by multiple scattering in the layered medium. We use both a Monte Carlo technique and an analytical diffusion model valid for optically thick media. Our preliminary numerical results are consistent with estimates of the multiple scattering delay from laboratory measurements using snow harvested in Greenland, namely, a few cm. Planned refinements of the models are described. NASA/JPL Report Greenland Sea ice JPL Technical Report Server Greenland |
institution |
Open Polar |
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JPL Technical Report Server |
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ftnasajpl |
language |
English |
description |
The primary goal of NASA’s current ICESat and future ICESat2 missions is to map the altitude of the Earth’s land ice with high accuracy using laser altimetry technology, and to measure sea ice freeboard. Ice however is a highly transparent optical medium with variable scattering and absorption properties. Moreover, it is often covered by a layer of snow with varying depth and optical properties largely dependent on its age. We describe a modeling framework for estimating the potential altimetry bias caused by multiple scattering in the layered medium. We use both a Monte Carlo technique and an analytical diffusion model valid for optically thick media. Our preliminary numerical results are consistent with estimates of the multiple scattering delay from laboratory measurements using snow harvested in Greenland, namely, a few cm. Planned refinements of the models are described. NASA/JPL |
format |
Report |
author |
Davis, A. B. Várnai, T. Marshak, A. |
spellingShingle |
Davis, A. B. Várnai, T. Marshak, A. Multiple scattering of laser pulses in snow over ice: modeling the potential bias in ICESat altimetry |
author_facet |
Davis, A. B. Várnai, T. Marshak, A. |
author_sort |
Davis, A. B. |
title |
Multiple scattering of laser pulses in snow over ice: modeling the potential bias in ICESat altimetry |
title_short |
Multiple scattering of laser pulses in snow over ice: modeling the potential bias in ICESat altimetry |
title_full |
Multiple scattering of laser pulses in snow over ice: modeling the potential bias in ICESat altimetry |
title_fullStr |
Multiple scattering of laser pulses in snow over ice: modeling the potential bias in ICESat altimetry |
title_full_unstemmed |
Multiple scattering of laser pulses in snow over ice: modeling the potential bias in ICESat altimetry |
title_sort |
multiple scattering of laser pulses in snow over ice: modeling the potential bias in icesat altimetry |
publisher |
Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2010 |
publishDate |
2015 |
url |
http://hdl.handle.net/2014/45128 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Sea ice |
genre_facet |
Greenland Sea ice |
op_relation |
25th International Conference on Laser Radar (ILRC 25), St. Petersburg, Russia, July 5-9, 2010 10-2218 http://hdl.handle.net/2014/45128 |
_version_ |
1766018505903177728 |