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DTSTART;TZID=America/New_York:20190928T080000
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SUMMARY:ICESat-2: The Link between Lasers and Tractors
DESCRIPTION:This event has passed. See the seminar recording here:\n\n \n\n\nDr. Kelly Brunt\nNASA Goddard Space Flight Center\nMonday September 23, 2019, 12 PM\nESSIC Conference Room 4102, 5825 University Research Ct, College Park, MD 20740\nAbstract:\nThe Ice, Cloud, and land Elevation Satellite 2 (ICESat-2) mission launched in September 2018, with mission goals that include the determination of the surface height of our ice sheets with centimeter-level accuracy. ICESat-2 carries a single instrument: the Advanced Topographic Laser Altimeter System (ATLAS). ATLAS is a six-beam, photon-counting laser altimeter, pulsing with a 10 kHz repetition frequency, and detects ‘photon events’ using single-photon-sensitive detectors. The ICESat-2 global dataset provides a dense along-track and across-track representation of surface heights. To determine the surface bias and surface-measurement precision of ICESat-2 data products, including ATL03 photon-based heights and ATL06 segment-based heights, we compared these data with heights from an extensive ground-based kinematic GPS survey, based out of South Pole Station, Antarctica. The 750-km ‘88S Traverse’ GPS data are internally consistent with a residual of 0.2 cm and a precision of ~10 cm. Comparisons with ICESat-2 data indicate that: ATL03 is currently accurate to ~5 cm with ~10 cm of surface-measurement precision; and ATL06 is currently accurate to better than 3 cm with better than 9 cm of surface-measurement precision. For completeness, we also show comparisons between our ground-based data and heights from Operation IceBridge (specifically, Airborne Topographic Mapper, ATM) and CyroSat-2. Here, we present these comparisons, with a focus on providing a first assessment of ICESat-2 performance over ice-sheet interiors.\nBio-sketch:\nDr. Brunt is an Associate Research Scientist with Earth System Science Interdisciplinary Center, at the University of Maryland and the NASA Cryospheric Sciences Laboratory. She obtained a B.S. and an M.S. in Geology from Syracuse University and the University of Montana, respectively. She received her Ph.D. in Geophysics from the University of Chicago in 2008, modeling ice-shelf flow and the connection between ice shelves and the ocean. As a postdoctoral scholar at Scripps Institution of Oceanography, she worked on Ice, Cloud, and land Elevation Satellite (ICESat) laser altimetry data. Dr. Brunt is currently part of the ICESat-2 mission, and is working on post-launch calibration and validation of the satellite elevation data.\nWebinar info: \nEvent site: http://go.umd.edu/brunt ( http://go.umd.edu/brunt )\nEvent number: 737 287 212\nEvent password: essic\n——————————————————-\nTo join the online event\n——————————————————-\n1. Click here to join the online event.\nOr copy and paste the following link to a browser: \nhttps://umd.webex.com/umd/onstage/g.php?MTID=e9f73d038e7afccc273a68fab4ba40c62\n2. Click “Join Now”.\n——————————————————-\nTo join the audio conference only\n——————————————————-\nUS Toll: +1-415-655-0002\nGlobal call-in numbers:\nhttps://umd.webex.com/umd/globalcallin.php?MTID=ea9bead4c99a2bf730404131d2581f5c6\nAccess code: 737 287 212\n——————————————————-\nFor IT assistance\n——————————————————-\nCazzy Medley: cazzy@umd.edu ( mailto:cazzy@umd.edu )\nTravis Swaim: tswaim1@umd.edu\n\nFollow ESSIC:\nESSIC homepage: http://essic.umd.edu/\nESSIC seminar schedule/archive: http://go.umd.edu/essicseminar\nESSIC seminar site: https://go.umd.edu/essicseminarsite\nESSIC Youtube: https://www.youtube.com/user/ESSICUMD ( https://www.youtube.com/user/ESSICUMD )\nESSIC Twitter: http://twitter.com/ESSICUMD\nESSIC Facebook: http://facebook.com/ESSICUMD\nESSIC seminar coordinator: Dr. John Yang, jxyang@umd.edu\nContact coordinator for subscribing email announcement or giving a talk\n
URL:https://essic.umd.edu/events/icesat-2-the-link-between-lasers-and-tractors/
CATEGORIES:Fall 2019
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