Effects of space weather on GOCE electrostatic gravity gradiometer measurements
We examine the presence of residual nongravitational signatures in gravitational gradients measured by GOCE electrostatic gravity gradiometer. These signatures are observed over the magnetic poles during geomagnetically active days and can contaminate the trace of the gravitational gradient tensor b...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_2653924 2023-05-15T16:29:19+02:00 Effects of space weather on GOCE electrostatic gravity gradiometer measurements Ince, E. Pagiatakis, S. 2016 https://gfzpublic.gfz-potsdam.de/pubman/item/item_2653924 unknown info:eu-repo/semantics/altIdentifier/doi/10.1007/s00190-016-0931-8 https://gfzpublic.gfz-potsdam.de/pubman/item/item_2653924 Journal of Geodesy info:eu-repo/semantics/article 2016 ftgfzpotsdam https://doi.org/10.1007/s00190-016-0931-8 2022-09-14T05:53:42Z We examine the presence of residual nongravitational signatures in gravitational gradients measured by GOCE electrostatic gravity gradiometer. These signatures are observed over the magnetic poles during geomagnetically active days and can contaminate the trace of the gravitational gradient tensor by up to three to five times the expected noise level of the instrument ( ∼∼11 mE). We investigate these anomalies in the gradiometer measurements along many satellite tracks and examine possible causes using external datasets, such as interplanetary electric field measurements from the ACE (advanced composition explorer) and WIND spacecraft, and Poynting vector (flux) estimated from equivalent ionospheric currents derived from spherical elementary current systems over North America and Greenland. We show that the variations in the east-west and vertical electrical currents and Poynting vector components at the satellite position are highly correlated with the disturbances observed in the gradiometer measurements. The results presented in this paper reveal that the disturbances are due to intense ionospheric current variations that are enhanced by increased solar activity that causes a very dynamic drag environment. Moreover, successful modelling and removal of a high percentage of these disturbances are possible using external geomagnetic field observations. Article in Journal/Newspaper Greenland GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Greenland Journal of Geodesy 90 12 1389 1403 |
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Open Polar |
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GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
We examine the presence of residual nongravitational signatures in gravitational gradients measured by GOCE electrostatic gravity gradiometer. These signatures are observed over the magnetic poles during geomagnetically active days and can contaminate the trace of the gravitational gradient tensor by up to three to five times the expected noise level of the instrument ( ∼∼11 mE). We investigate these anomalies in the gradiometer measurements along many satellite tracks and examine possible causes using external datasets, such as interplanetary electric field measurements from the ACE (advanced composition explorer) and WIND spacecraft, and Poynting vector (flux) estimated from equivalent ionospheric currents derived from spherical elementary current systems over North America and Greenland. We show that the variations in the east-west and vertical electrical currents and Poynting vector components at the satellite position are highly correlated with the disturbances observed in the gradiometer measurements. The results presented in this paper reveal that the disturbances are due to intense ionospheric current variations that are enhanced by increased solar activity that causes a very dynamic drag environment. Moreover, successful modelling and removal of a high percentage of these disturbances are possible using external geomagnetic field observations. |
format |
Article in Journal/Newspaper |
author |
Ince, E. Pagiatakis, S. |
spellingShingle |
Ince, E. Pagiatakis, S. Effects of space weather on GOCE electrostatic gravity gradiometer measurements |
author_facet |
Ince, E. Pagiatakis, S. |
author_sort |
Ince, E. |
title |
Effects of space weather on GOCE electrostatic gravity gradiometer measurements |
title_short |
Effects of space weather on GOCE electrostatic gravity gradiometer measurements |
title_full |
Effects of space weather on GOCE electrostatic gravity gradiometer measurements |
title_fullStr |
Effects of space weather on GOCE electrostatic gravity gradiometer measurements |
title_full_unstemmed |
Effects of space weather on GOCE electrostatic gravity gradiometer measurements |
title_sort |
effects of space weather on goce electrostatic gravity gradiometer measurements |
publishDate |
2016 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_2653924 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Journal of Geodesy |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00190-016-0931-8 https://gfzpublic.gfz-potsdam.de/pubman/item/item_2653924 |
op_doi |
https://doi.org/10.1007/s00190-016-0931-8 |
container_title |
Journal of Geodesy |
container_volume |
90 |
container_issue |
12 |
container_start_page |
1389 |
op_container_end_page |
1403 |
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1766019010950856704 |