RT info:eu-repo/semantics/article
T1 Radiometric Calibration Targets for the Mastcam-Z Camera on the Mars 2020 Rover Mission
A1 Kinch, K. M.
A1 Madsen, M. B.
A1 Bell, J. F.
A1 Maki, J. N.
A1 Bailey, Z. J.
A1 Hayes, A. G.
A1 Jensen, O. B.
A1 Merusi, M.
A1 Bernt, M. H.
A1 Sørensen, A. N.
A1 Hilverda, M.
A1 Cloutis, E.
A1 Applin, D.
A1 Mateo Marti, E.
A1 Manrique Martínez, José Antonio
A1 López Reyes, Guillermo Eduardo
A1 Bello Arufe, A.
A1 Ehlmann, B. L.
A1 Buz, J.
A1 Pommerol, A.
A1 Thomas, N.
A1 Affolter, L.
A1 Herkenhoff, K. E.
A1 Johnson, J. R.
A1 Rice, M.
A1 Corlies, P.
A1 Tate, C.
A1 Caplinger, M. A.
A1 Jensen, E.
A1 Kubacki, T.
A1 Cisneros, E.
A1 Paris, K.
A1 Winhold, A.
AB The Mastcam-Z Camera is a stereoscopic, multispectral camera with zoom ca pability on NASA’s Mars-2020 Perseverance rover. The Mastcam-Z relies on a set of twodeck-mounted radiometric calibration targets to validate camera performance and to providean instantaneous estimate of local irradiance and allow conversion of image data to units ofreflectance (R∗ or I/F) on a tactical timescale. Here, we describe the heritage, design, and optical characterization of these targets and discuss their use during rover operations. TheMastcam-Z primary calibration target inherits features of camera calibration targets on theMars Exploration Rovers, Phoenix and Mars Science Laboratory missions. This target willbe regularly imaged during flight to accompany multispectral observations of the martiansurface. The primary target consists of a gold-plated aluminum base, eight strong hollow cylinder Sm2Co17 alloy permanent magnets mounted in the base, eight ceramic color andgrayscale patches mounted over the magnets, four concentric, ceramic grayscale rings anda central aluminum shadow post (gnomon) painted with an IR-black paint. The magnetsare expected to keep the central area of each patch relatively free of Martian aeolian dust.The Mastcam-Z secondary calibration target is a simple angled aluminum shelf carryingseven vertically mounted ceramic color and grayscale chips and seven identical, but hori zontally mounted ceramic chips. The secondary target is intended to augment and validatethe calibration-related information derived from the primary target. The Mastcam-Z radio metric calibration targets are critically important to achieving Mastcam-Z science objectivesfor spectroscopy and photometric properties
PB Springer
SN 0038-6308
YR 2020
FD 2020
LK http://uvadoc.uva.es/handle/10324/46260
UL http://uvadoc.uva.es/handle/10324/46260
LA eng
NO Space Science Reviews, Diciembre 2020, Vol. 216(8),  n. 141
DS UVaDOC
RD 11-jul-2024