Investigating Lunar Boulders at the Apollo 17 Landing Site Using Photogrammetry and Virtual Reality

The Taurus-Littrow valley on the Moon was the location of intensive geologic fieldwork during three days in December 1972. In situ activities at sampling stations were systematically documented by the astronauts using a series of overlapping images taken with their Hasselblad cameras. We investigate...

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Main Authors: Stéphane Le Mouélic, Pauline Enguehard, Harrison H. Schmitt, Gwénaël Caravaca, Benoît Seignovert, Nicolas Mangold, Jean-Philippe Combe, François Civet
Format: Article
Language:English
Published: MDPI AG 2020-06-01
Series:Remote Sensing
Subjects:
Online Access:https://www.mdpi.com/2072-4292/12/11/1900
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author Stéphane Le Mouélic
Pauline Enguehard
Harrison H. Schmitt
Gwénaël Caravaca
Benoît Seignovert
Nicolas Mangold
Jean-Philippe Combe
François Civet
author_facet Stéphane Le Mouélic
Pauline Enguehard
Harrison H. Schmitt
Gwénaël Caravaca
Benoît Seignovert
Nicolas Mangold
Jean-Philippe Combe
François Civet
author_sort Stéphane Le Mouélic
collection DOAJ
description The Taurus-Littrow valley on the Moon was the location of intensive geologic fieldwork during three days in December 1972. In situ activities at sampling stations were systematically documented by the astronauts using a series of overlapping images taken with their Hasselblad cameras. We investigated how this Apollo image archive can be used to perform 3-D reconstructions of several boulders of interest using close-range photogrammetry. We specifically focused on seven different boulders located at Stations 2, 6, and 7, at the foot of South and North Massifs, respectively. These boulders represent samples from highland materials, which rolled down the slopes of the surrounding hills. We used the Agisoft Metashape software to compute 3-D reconstructions of these boulders, using 173 scanned images as input. We then used either a web-based platform or a game engine to render the models in virtual reality. This allowed the users to walk around the boulders and to investigate in detail their morphology, fractures, vesicles, color variations, and sampling spots, as if standing directly in front of them with the astronauts. This work suggests that many features can be reconstructed in other sites of the Apollo missions, so as other robotic landing sites. Virtual reality techniques coupled to photogrammetry is thus opening a new era of exploration, both for past and future landing sites.
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spelling doaj.art-64135d7acf484815a8e1b2f253b4a9232023-11-20T03:33:09ZengMDPI AGRemote Sensing2072-42922020-06-011211190010.3390/rs12111900Investigating Lunar Boulders at the Apollo 17 Landing Site Using Photogrammetry and Virtual RealityStéphane Le Mouélic0Pauline Enguehard1Harrison H. Schmitt2Gwénaël Caravaca3Benoît Seignovert4Nicolas Mangold5Jean-Philippe Combe6François Civet7Laboratoire de Planétologie et Géodynamique, CNRS UMR6112, Université de Nantes, 44322 Nantes, FranceLaboratoire de Planétologie et Géodynamique, CNRS UMR6112, Université de Nantes, 44322 Nantes, FranceDepartment of Engineering Physics, University of Wisconsin-Madison, P.O. Box 90730, Albuquerque, NM 87199, USALaboratoire de Planétologie et Géodynamique, CNRS UMR6112, Université de Nantes, 44322 Nantes, FranceJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USALaboratoire de Planétologie et Géodynamique, CNRS UMR6112, Université de Nantes, 44322 Nantes, FranceBear Fight Institute, 22 Fiddler’s Road, Winthrop, WA 98862, USAVR2Planets, 44322 Nantes, FranceThe Taurus-Littrow valley on the Moon was the location of intensive geologic fieldwork during three days in December 1972. In situ activities at sampling stations were systematically documented by the astronauts using a series of overlapping images taken with their Hasselblad cameras. We investigated how this Apollo image archive can be used to perform 3-D reconstructions of several boulders of interest using close-range photogrammetry. We specifically focused on seven different boulders located at Stations 2, 6, and 7, at the foot of South and North Massifs, respectively. These boulders represent samples from highland materials, which rolled down the slopes of the surrounding hills. We used the Agisoft Metashape software to compute 3-D reconstructions of these boulders, using 173 scanned images as input. We then used either a web-based platform or a game engine to render the models in virtual reality. This allowed the users to walk around the boulders and to investigate in detail their morphology, fractures, vesicles, color variations, and sampling spots, as if standing directly in front of them with the astronauts. This work suggests that many features can be reconstructed in other sites of the Apollo missions, so as other robotic landing sites. Virtual reality techniques coupled to photogrammetry is thus opening a new era of exploration, both for past and future landing sites.https://www.mdpi.com/2072-4292/12/11/1900sample documentationremote sensingphotogrammetrymoon3-DApollo
spellingShingle Stéphane Le Mouélic
Pauline Enguehard
Harrison H. Schmitt
Gwénaël Caravaca
Benoît Seignovert
Nicolas Mangold
Jean-Philippe Combe
François Civet
Investigating Lunar Boulders at the Apollo 17 Landing Site Using Photogrammetry and Virtual Reality
Remote Sensing
sample documentation
remote sensing
photogrammetry
moon
3-D
Apollo
title Investigating Lunar Boulders at the Apollo 17 Landing Site Using Photogrammetry and Virtual Reality
title_full Investigating Lunar Boulders at the Apollo 17 Landing Site Using Photogrammetry and Virtual Reality
title_fullStr Investigating Lunar Boulders at the Apollo 17 Landing Site Using Photogrammetry and Virtual Reality
title_full_unstemmed Investigating Lunar Boulders at the Apollo 17 Landing Site Using Photogrammetry and Virtual Reality
title_short Investigating Lunar Boulders at the Apollo 17 Landing Site Using Photogrammetry and Virtual Reality
title_sort investigating lunar boulders at the apollo 17 landing site using photogrammetry and virtual reality
topic sample documentation
remote sensing
photogrammetry
moon
3-D
Apollo
url https://www.mdpi.com/2072-4292/12/11/1900
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