1977
DOI: 10.1029/js082i028p04547
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The Viking Magnetic Properties Experiment: Primary mission results

Abstract: Three permanent magnet arrays were aboard each Viking lander: a strong array fixed on a photometric reference test chart (RTC) on top of the landers, and two other arrays, one strong and one weak, incorporated in the backhoe of the surface sampler. The RTC magnets on both landers have attracted magnetic particles from the dust cloud caused by the retro‐rockets on landing and by dust raised in connection with surface sample acquisition and delivery. A considerable amount of magnetic particles has been attracted… Show more

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Cited by 130 publications
(76 citation statements)
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“…In situ data from the Mars Pathfinder camera indicate that iron minerals may also be responsible for a 930 nm absorption in some soils [Smith et al, 1997]. A ferric component was also inferred from the Viking magnetic properties experiments which indicated the presence of 1% to 7% of a highly magnetic mineral phase, likely maghemite (¾-Fe203), in the Martian soil [Hargraves et al, 1977]. These Viking results are supported by the Pathfinder data which suggest that most dust particles contain about 6% maghemite [Hviid et al, 1997].…”
Section: Ferric Minerals On Marssupporting
confidence: 73%
“…In situ data from the Mars Pathfinder camera indicate that iron minerals may also be responsible for a 930 nm absorption in some soils [Smith et al, 1997]. A ferric component was also inferred from the Viking magnetic properties experiments which indicated the presence of 1% to 7% of a highly magnetic mineral phase, likely maghemite (¾-Fe203), in the Martian soil [Hargraves et al, 1977]. These Viking results are supported by the Pathfinder data which suggest that most dust particles contain about 6% maghemite [Hviid et al, 1997].…”
Section: Ferric Minerals On Marssupporting
confidence: 73%
“…The present study was conducted assuming that the underground magnetic permeability is equal to m 0 since measurements were performed on nonmagnetic grounds. In the case of Mars, both Viking Landers and the Pathfinder Lander/Sojourner Rover brought evidence of the presence of magnetic minerals on the Martian surface [Hargraves et al, 1977], the red color of the planet also suggesting that it contains iron oxides (hematite, maghemite) [Heggy et al, 2001;Leuschen et al, 2003]. However, in absence of reliable information on the Martian subsurface permeability [Ori and Ogliani, 1996] we started by assuming nonmagnetic materials with: m = m 0 .…”
Section: Constitutive Parameters Of the Propagation Mediummentioning
confidence: 99%
“…We used these data to estimate the depth to which the WAE wheel had dug as a function of the wheel revolution. Figure 14 [Hargraves et al, 1977[Hargraves et al, , 1979]. …”
Section: Depth Of Dig In the Martian Dustmentioning
confidence: 99%