Bidirectional reflectance distribution function measurements of the Winchcombe meteorite using the Visible Oxford Space Environment Goniometer
A laboratory study was performed using the Visible Oxford Space Environment Goniometer in which the broadband (350–1250 nm) bidirectional reflectance distribution function (BRDF) of the Winchcombe meteorite was measured, across a range of viewing angles—reflectance: 0°–70°, in steps of 5°; incidence...
Published in: | Meteoritics & Planetary Science |
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Language: | English |
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Wiley
2024
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Online Access: | https://doi.org/10.1111/maps.14055 https://ora.ox.ac.uk/objects/uuid:b95d843f-dc30-4195-9f21-e86021e7e234 |
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ftuloxford:oai:ora.ox.ac.uk:uuid:b95d843f-dc30-4195-9f21-e86021e7e234 2024-09-15T18:38:30+00:00 Bidirectional reflectance distribution function measurements of the Winchcombe meteorite using the Visible Oxford Space Environment Goniometer Curtis, RJ Bates, HC Warren, TJ Shirley, KA Brown, EC King, AJ Bowles, NE 2024-07-08 https://doi.org/10.1111/maps.14055 https://ora.ox.ac.uk/objects/uuid:b95d843f-dc30-4195-9f21-e86021e7e234 eng eng Wiley doi:10.1111/maps.14055 https://ora.ox.ac.uk/objects/uuid:b95d843f-dc30-4195-9f21-e86021e7e234 https://doi.org/10.1111/maps.14055 info:eu-repo/semantics/embargoedAccess Journal article 2024 ftuloxford https://doi.org/10.1111/maps.14055 2024-08-05T14:07:49Z A laboratory study was performed using the Visible Oxford Space Environment Goniometer in which the broadband (350–1250 nm) bidirectional reflectance distribution function (BRDF) of the Winchcombe meteorite was measured, across a range of viewing angles—reflectance: 0°–70°, in steps of 5°; incidence: 15°, 30°, 45°, and 60°; and azimuthal: 0°, 90°, and 180°. The BRDF dataset was fitted using the Hapke BRDF model to (1) provide a method of comparison to other meteorites and asteroids, and (2) to produce Hapke parameter values that can be used to extrapolate the BRDF to all angles. The study deduced the following Hapke parameters for Winchcombe: w = 0.152 ± 0.030, b = 0.633 ± 0.064, and hS = 0.016 ± 0.008, demonstrating that it has a similar w value to Tagish Lake (0.157 ± 0.020) and a similar b value to Orgueil (0.671 ± 0.090). Importantly, the surface profile of the sample was characterized using an Alicona 3D® instrument, allowing two of the free parameters within the Hapke model φ and (Formula presented.), which represent porosity and surface roughness, respectively, to be constrained as φ = 0.649 ± 0.023 and (Formula presented.) = 16.113° (at 500 μm size scale). This work serves as part of the characterization process for Winchcombe and provides a reference photometry dataset for current and future asteroid missions. Article in Journal/Newspaper Tagish ORA - Oxford University Research Archive Meteoritics & Planetary Science 59 5 1029 1042 |
institution |
Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
description |
A laboratory study was performed using the Visible Oxford Space Environment Goniometer in which the broadband (350–1250 nm) bidirectional reflectance distribution function (BRDF) of the Winchcombe meteorite was measured, across a range of viewing angles—reflectance: 0°–70°, in steps of 5°; incidence: 15°, 30°, 45°, and 60°; and azimuthal: 0°, 90°, and 180°. The BRDF dataset was fitted using the Hapke BRDF model to (1) provide a method of comparison to other meteorites and asteroids, and (2) to produce Hapke parameter values that can be used to extrapolate the BRDF to all angles. The study deduced the following Hapke parameters for Winchcombe: w = 0.152 ± 0.030, b = 0.633 ± 0.064, and hS = 0.016 ± 0.008, demonstrating that it has a similar w value to Tagish Lake (0.157 ± 0.020) and a similar b value to Orgueil (0.671 ± 0.090). Importantly, the surface profile of the sample was characterized using an Alicona 3D® instrument, allowing two of the free parameters within the Hapke model φ and (Formula presented.), which represent porosity and surface roughness, respectively, to be constrained as φ = 0.649 ± 0.023 and (Formula presented.) = 16.113° (at 500 μm size scale). This work serves as part of the characterization process for Winchcombe and provides a reference photometry dataset for current and future asteroid missions. |
format |
Article in Journal/Newspaper |
author |
Curtis, RJ Bates, HC Warren, TJ Shirley, KA Brown, EC King, AJ Bowles, NE |
spellingShingle |
Curtis, RJ Bates, HC Warren, TJ Shirley, KA Brown, EC King, AJ Bowles, NE Bidirectional reflectance distribution function measurements of the Winchcombe meteorite using the Visible Oxford Space Environment Goniometer |
author_facet |
Curtis, RJ Bates, HC Warren, TJ Shirley, KA Brown, EC King, AJ Bowles, NE |
author_sort |
Curtis, RJ |
title |
Bidirectional reflectance distribution function measurements of the Winchcombe meteorite using the Visible Oxford Space Environment Goniometer |
title_short |
Bidirectional reflectance distribution function measurements of the Winchcombe meteorite using the Visible Oxford Space Environment Goniometer |
title_full |
Bidirectional reflectance distribution function measurements of the Winchcombe meteorite using the Visible Oxford Space Environment Goniometer |
title_fullStr |
Bidirectional reflectance distribution function measurements of the Winchcombe meteorite using the Visible Oxford Space Environment Goniometer |
title_full_unstemmed |
Bidirectional reflectance distribution function measurements of the Winchcombe meteorite using the Visible Oxford Space Environment Goniometer |
title_sort |
bidirectional reflectance distribution function measurements of the winchcombe meteorite using the visible oxford space environment goniometer |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1111/maps.14055 https://ora.ox.ac.uk/objects/uuid:b95d843f-dc30-4195-9f21-e86021e7e234 |
genre |
Tagish |
genre_facet |
Tagish |
op_relation |
doi:10.1111/maps.14055 https://ora.ox.ac.uk/objects/uuid:b95d843f-dc30-4195-9f21-e86021e7e234 https://doi.org/10.1111/maps.14055 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1111/maps.14055 |
container_title |
Meteoritics & Planetary Science |
container_volume |
59 |
container_issue |
5 |
container_start_page |
1029 |
op_container_end_page |
1042 |
_version_ |
1810482901320466432 |