Helicopter Test of a Strapdown Airborne Gravimetry System
Airborne gravimetry from a helicopter has been a feasible tool since the 1990s, with gravimeters mounted on a gyro-stabilised platform. In contrast to fixed-wing aircrafts, the helicopter allows for a higher spatial resolution, since it can move slower and closer to the ground. In August 2016, a str...
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ftpubmed:oai:pubmedcentral.nih.gov:6164569 2023-05-15T16:21:22+02:00 Helicopter Test of a Strapdown Airborne Gravimetry System Jensen, Tim Enzlberger Forsberg, Rene 2018-09-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164569/ http://www.ncbi.nlm.nih.gov/pubmed/30223604 https://doi.org/10.3390/s18093121 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164569/ http://www.ncbi.nlm.nih.gov/pubmed/30223604 http://dx.doi.org/10.3390/s18093121 © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Article Text 2018 ftpubmed https://doi.org/10.3390/s18093121 2018-10-14T00:29:08Z Airborne gravimetry from a helicopter has been a feasible tool since the 1990s, with gravimeters mounted on a gyro-stabilised platform. In contrast to fixed-wing aircrafts, the helicopter allows for a higher spatial resolution, since it can move slower and closer to the ground. In August 2016, a strapdown gravimetry test was carried out over the Jakobshavn Glacier in Greenland. To our knowledge, this was the first time that a strapdown system was used in a helicopter. The strapdown configuration is appealing because it is easily installed and requires no operation during flight. While providing additional information over the thickest part of the glacier, the survey was designed to assess repeatability both within the survey and with respect to profiles flown previously using a gyro-stabilised gravimeter. The system’s ability to fly at an altitude following the terrain, i.e., draped flying, was also tested. The accuracy of the gravity profiles was estimated to 2 mGal and a method for inferring the spatial resolution was investigated, yielding a half-wavelength spatial resolution of 4.5 km at normal cruise speed. Text glacier Greenland Jakobshavn PubMed Central (PMC) Greenland Sensors 18 9 3121 |
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Article Jensen, Tim Enzlberger Forsberg, Rene Helicopter Test of a Strapdown Airborne Gravimetry System |
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Article |
description |
Airborne gravimetry from a helicopter has been a feasible tool since the 1990s, with gravimeters mounted on a gyro-stabilised platform. In contrast to fixed-wing aircrafts, the helicopter allows for a higher spatial resolution, since it can move slower and closer to the ground. In August 2016, a strapdown gravimetry test was carried out over the Jakobshavn Glacier in Greenland. To our knowledge, this was the first time that a strapdown system was used in a helicopter. The strapdown configuration is appealing because it is easily installed and requires no operation during flight. While providing additional information over the thickest part of the glacier, the survey was designed to assess repeatability both within the survey and with respect to profiles flown previously using a gyro-stabilised gravimeter. The system’s ability to fly at an altitude following the terrain, i.e., draped flying, was also tested. The accuracy of the gravity profiles was estimated to 2 mGal and a method for inferring the spatial resolution was investigated, yielding a half-wavelength spatial resolution of 4.5 km at normal cruise speed. |
format |
Text |
author |
Jensen, Tim Enzlberger Forsberg, Rene |
author_facet |
Jensen, Tim Enzlberger Forsberg, Rene |
author_sort |
Jensen, Tim Enzlberger |
title |
Helicopter Test of a Strapdown Airborne Gravimetry System |
title_short |
Helicopter Test of a Strapdown Airborne Gravimetry System |
title_full |
Helicopter Test of a Strapdown Airborne Gravimetry System |
title_fullStr |
Helicopter Test of a Strapdown Airborne Gravimetry System |
title_full_unstemmed |
Helicopter Test of a Strapdown Airborne Gravimetry System |
title_sort |
helicopter test of a strapdown airborne gravimetry system |
publisher |
MDPI |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164569/ http://www.ncbi.nlm.nih.gov/pubmed/30223604 https://doi.org/10.3390/s18093121 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Jakobshavn |
genre_facet |
glacier Greenland Jakobshavn |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164569/ http://www.ncbi.nlm.nih.gov/pubmed/30223604 http://dx.doi.org/10.3390/s18093121 |
op_rights |
© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/s18093121 |
container_title |
Sensors |
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18 |
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9 |
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3121 |
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1766009375984451584 |