Airborne gravity and other geophysical techniques for understanding the lithosphere beneath the West Antarctic Ice Sheet
As part of a program entitled Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), an aerogeophysical platform was developed to study the interaction of geological and glaciological processes in West Antarctica. A de Havilland Twin Otter was equipped with an ice-penetrating rada...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19930022705 2023-05-15T14:04:19+02:00 Airborne gravity and other geophysical techniques for understanding the lithosphere beneath the West Antarctic Ice Sheet Bell, Robin E. Blankenship, Donald D. Hodge, Steven M. Brozena, John M. Behrendt, John C. Unclassified, Unlimited, Publicly available Jul 1, 1993 http://ntrs.nasa.gov/search.jsp?R=19930022705 unknown http://ntrs.nasa.gov/search.jsp?R=19930022705 Accession ID: 93N31894 No Copyright Other Sources 46 NASA. Goddard Space Flight Center, The First Annual West Antarctic Ice Sheet (WAIS) Science Workshop; p 26 1993 ftnasantrs 2012-02-15T19:56:21Z As part of a program entitled Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), an aerogeophysical platform was developed to study the interaction of geological and glaciological processes in West Antarctica. A de Havilland Twin Otter was equipped with an ice-penetrating radar, a proton precession magnetometer, an airborne gravity system, and a laser altimeter. The 60-MHz ice-penetrating radar can recover sub-ice topography with an accuracy of about 10 m through 3 km of comparatively warm West Antarctic ice, while the laser altimeter profiling of the ice surface is accurate to approximately 1 m. The magnetic field observations are accurate to several nT, and the gravity measurements are accurate to better than 3 mGal. The aircraft is navigated by a local radio transponder network, while differential positioning techniques based on the Global Positioning System (GPS) satellites are used for recovering high-resolution horizontal and vertical positions. Attitude information from an inertial navigation system is used to correct the laser altimetry and a digital pressure transducer is used to recover vertical positions and accelerations in the absence of satellite positioning. Continuous base-station observations are made for the differential GPS positioning and the removal of ionospheric noise from the airborne magnetometer measurements. Other/Unknown Material Antarc* Antarctic Antarctica Ice Sheet West Antarctica NASA Technical Reports Server (NTRS) Antarctic West Antarctica West Antarctic Ice Sheet Havilland ENVELOPE(-60.217,-60.217,-63.933,-63.933) |
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NASA Technical Reports Server (NTRS) |
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46 Bell, Robin E. Blankenship, Donald D. Hodge, Steven M. Brozena, John M. Behrendt, John C. Airborne gravity and other geophysical techniques for understanding the lithosphere beneath the West Antarctic Ice Sheet |
topic_facet |
46 |
description |
As part of a program entitled Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), an aerogeophysical platform was developed to study the interaction of geological and glaciological processes in West Antarctica. A de Havilland Twin Otter was equipped with an ice-penetrating radar, a proton precession magnetometer, an airborne gravity system, and a laser altimeter. The 60-MHz ice-penetrating radar can recover sub-ice topography with an accuracy of about 10 m through 3 km of comparatively warm West Antarctic ice, while the laser altimeter profiling of the ice surface is accurate to approximately 1 m. The magnetic field observations are accurate to several nT, and the gravity measurements are accurate to better than 3 mGal. The aircraft is navigated by a local radio transponder network, while differential positioning techniques based on the Global Positioning System (GPS) satellites are used for recovering high-resolution horizontal and vertical positions. Attitude information from an inertial navigation system is used to correct the laser altimetry and a digital pressure transducer is used to recover vertical positions and accelerations in the absence of satellite positioning. Continuous base-station observations are made for the differential GPS positioning and the removal of ionospheric noise from the airborne magnetometer measurements. |
format |
Other/Unknown Material |
author |
Bell, Robin E. Blankenship, Donald D. Hodge, Steven M. Brozena, John M. Behrendt, John C. |
author_facet |
Bell, Robin E. Blankenship, Donald D. Hodge, Steven M. Brozena, John M. Behrendt, John C. |
author_sort |
Bell, Robin E. |
title |
Airborne gravity and other geophysical techniques for understanding the lithosphere beneath the West Antarctic Ice Sheet |
title_short |
Airborne gravity and other geophysical techniques for understanding the lithosphere beneath the West Antarctic Ice Sheet |
title_full |
Airborne gravity and other geophysical techniques for understanding the lithosphere beneath the West Antarctic Ice Sheet |
title_fullStr |
Airborne gravity and other geophysical techniques for understanding the lithosphere beneath the West Antarctic Ice Sheet |
title_full_unstemmed |
Airborne gravity and other geophysical techniques for understanding the lithosphere beneath the West Antarctic Ice Sheet |
title_sort |
airborne gravity and other geophysical techniques for understanding the lithosphere beneath the west antarctic ice sheet |
publishDate |
1993 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930022705 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-60.217,-60.217,-63.933,-63.933) |
geographic |
Antarctic West Antarctica West Antarctic Ice Sheet Havilland |
geographic_facet |
Antarctic West Antarctica West Antarctic Ice Sheet Havilland |
genre |
Antarc* Antarctic Antarctica Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet West Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930022705 Accession ID: 93N31894 |
op_rights |
No Copyright |
_version_ |
1766275352007540736 |