Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site
The Magnetic Properties Experiment (referred to as iSweep or Caltarget) onboard the Phoenix lander was executed in the arctic region of Mars during the mission's 152 sols lifetime. The iSweep experiment involved periodic multispectral imaging of a series of permanent ring magnets. It was design...
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Online Access: | https://curis.ku.dk/portal/da/publications/magnetic-and-optical-properties-of-airborne-dust-and-settling-rates-of-dust-at-the-phoenix-landing-site(35eaf170-febc-11de-825d-000ea68e967b).html https://doi.org/10.1029/2009JE003419 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/35eaf170-febc-11de-825d-000ea68e967b 2023-05-15T15:10:11+02:00 Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site Drube. , Line Leer, Kristoffer Madsen, Morten Bo Ellehøj, Mads Dam Haspang, Martin Patrong 2010-08-08 https://curis.ku.dk/portal/da/publications/magnetic-and-optical-properties-of-airborne-dust-and-settling-rates-of-dust-at-the-phoenix-landing-site(35eaf170-febc-11de-825d-000ea68e967b).html https://doi.org/10.1029/2009JE003419 eng eng info:eu-repo/semantics/restrictedAccess Drube.[et al.] , L , Leer , K , Madsen , M B , Ellehøj , M D & Haspang , M P 2010 , ' Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site ' , Journal of Geophysical Research: Biogeosciences , vol. 115 , pp. E00E23 . https://doi.org/10.1029/2009JE003419 article 2010 ftcopenhagenunip https://doi.org/10.1029/2009JE003419 2022-01-26T23:48:59Z The Magnetic Properties Experiment (referred to as iSweep or Caltarget) onboard the Phoenix lander was executed in the arctic region of Mars during the mission's 152 sols lifetime. The iSweep experiment involved periodic multispectral imaging of a series of permanent ring magnets. It was designed to attract airborne magnetic dust particles to certain areas on the iSweeps thereby sorting all settling airborne particles at least to some degree according to their magnetic properties. The dust on the area directly above the strong magnets of the iSweep was found to be brighter than that collected on the precursor Sweep Magnet Experiment onboard the Mars Exploration Rovers near Mars' equator, and also this dust is found to be brighter than both surface soil near the lander and soil in the region surrounding the lander. As most other dust and soils on Mars, the Phoenix dust lacks strong spectral signatures of highly crystalline phases. For the first time, based on the complete calibrated data set of images of the iSweeps, spectra were extracted of the putative dust falling on the magnetically protected areas of the iSweeps. These areas are accessible only for particles with a magnetic susceptibility below 10-3. Spectra of this nonmagnetic dust are interpreted as signals from nonmagnetic minerals such as tectosilicates or glasses pigmented by poorly crystalline ferric oxides. Rates of dust settling were determined to be 1.08 µm/sol on the magnets and 0.06 µm/sol for the magnetically protected areas. Article in Journal/Newspaper Arctic Magnetic susceptibility University of Copenhagen: Research Arctic Journal of Geophysical Research 115 |
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Open Polar |
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University of Copenhagen: Research |
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ftcopenhagenunip |
language |
English |
description |
The Magnetic Properties Experiment (referred to as iSweep or Caltarget) onboard the Phoenix lander was executed in the arctic region of Mars during the mission's 152 sols lifetime. The iSweep experiment involved periodic multispectral imaging of a series of permanent ring magnets. It was designed to attract airborne magnetic dust particles to certain areas on the iSweeps thereby sorting all settling airborne particles at least to some degree according to their magnetic properties. The dust on the area directly above the strong magnets of the iSweep was found to be brighter than that collected on the precursor Sweep Magnet Experiment onboard the Mars Exploration Rovers near Mars' equator, and also this dust is found to be brighter than both surface soil near the lander and soil in the region surrounding the lander. As most other dust and soils on Mars, the Phoenix dust lacks strong spectral signatures of highly crystalline phases. For the first time, based on the complete calibrated data set of images of the iSweeps, spectra were extracted of the putative dust falling on the magnetically protected areas of the iSweeps. These areas are accessible only for particles with a magnetic susceptibility below 10-3. Spectra of this nonmagnetic dust are interpreted as signals from nonmagnetic minerals such as tectosilicates or glasses pigmented by poorly crystalline ferric oxides. Rates of dust settling were determined to be 1.08 µm/sol on the magnets and 0.06 µm/sol for the magnetically protected areas. |
format |
Article in Journal/Newspaper |
author |
Drube. , Line Leer, Kristoffer Madsen, Morten Bo Ellehøj, Mads Dam Haspang, Martin Patrong |
spellingShingle |
Drube. , Line Leer, Kristoffer Madsen, Morten Bo Ellehøj, Mads Dam Haspang, Martin Patrong Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site |
author_facet |
Drube. , Line Leer, Kristoffer Madsen, Morten Bo Ellehøj, Mads Dam Haspang, Martin Patrong |
author_sort |
Drube. , Line |
title |
Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site |
title_short |
Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site |
title_full |
Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site |
title_fullStr |
Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site |
title_full_unstemmed |
Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site |
title_sort |
magnetic and optical properties of airborne dust and settling rates of dust at the phoenix landing site |
publishDate |
2010 |
url |
https://curis.ku.dk/portal/da/publications/magnetic-and-optical-properties-of-airborne-dust-and-settling-rates-of-dust-at-the-phoenix-landing-site(35eaf170-febc-11de-825d-000ea68e967b).html https://doi.org/10.1029/2009JE003419 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Magnetic susceptibility |
genre_facet |
Arctic Magnetic susceptibility |
op_source |
Drube.[et al.] , L , Leer , K , Madsen , M B , Ellehøj , M D & Haspang , M P 2010 , ' Magnetic and optical properties of airborne dust and settling rates of dust at the Phoenix landing site ' , Journal of Geophysical Research: Biogeosciences , vol. 115 , pp. E00E23 . https://doi.org/10.1029/2009JE003419 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2009JE003419 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
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1766341228003065856 |