Multispectral Terrain Analysis of Europa from Galileo Images

Beth E. Clark, Paul Helfenstein, Joseph Veverka, Maureen Ockert-Bell, R. J. Sullivan, P. E. Geissler, C. B. Phillips, Alfred S. McEwen, R. Greeley, G. Neukum, T. Denk, K. Klaasen

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Galileo's Solid State Imaging camera recorded six images at wavelengths from 0.41 to 0.99 μm of Europa's trailing hemisphere (~1.6 km/pixel resolution) during the G1 orbit (1st orbit - target Ganymede) of the nominal mission. We have photometrically corrected these data and extracted spectra representing Europa's diverse geologic terrains. The goals of the analysis of these spectra are (1) to determine whether Europa's geologic units differ spectrally from one another, (2) to determine the number of color components necessary to explain Europa's dark material spectral behavior, and (3) to examine how europan dark materials may change in color with time. Our data indicate that europan dark spots, lineaments and triple band side materials represent a single "dark" and reddish endmember component. We see no evidence for more than one dark endmember; however the dark endmember seen in these G1 data is probably not a "pure" exposure of europan dark material. Mottled terrains, brighter lineaments, and aging triple bands can be modeled by a mixture of bright plains materials and the dark component. Exposures of europan dark materials may thus be brightening with time, eventually blending into the surrounding bright plains.

Original languageEnglish (US)
Pages (from-to)95-106
Number of pages12
JournalIcarus
Volume135
Issue number1
DOIs
StatePublished - Sep 1998

Fingerprint

terrain analysis
Europa
plains
Ganymede
orbits
color
hemispheres
lineament
pixels
cameras
solid state
analysis
wavelengths
material
pixel

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Clark, B. E., Helfenstein, P., Veverka, J., Ockert-Bell, M., Sullivan, R. J., Geissler, P. E., ... Klaasen, K. (1998). Multispectral Terrain Analysis of Europa from Galileo Images. Icarus, 135(1), 95-106. https://doi.org/10.1006/icar.1998.5968

Multispectral Terrain Analysis of Europa from Galileo Images. / Clark, Beth E.; Helfenstein, Paul; Veverka, Joseph; Ockert-Bell, Maureen; Sullivan, R. J.; Geissler, P. E.; Phillips, C. B.; McEwen, Alfred S.; Greeley, R.; Neukum, G.; Denk, T.; Klaasen, K.

In: Icarus, Vol. 135, No. 1, 09.1998, p. 95-106.

Research output: Contribution to journalArticle

Clark, BE, Helfenstein, P, Veverka, J, Ockert-Bell, M, Sullivan, RJ, Geissler, PE, Phillips, CB, McEwen, AS, Greeley, R, Neukum, G, Denk, T & Klaasen, K 1998, 'Multispectral Terrain Analysis of Europa from Galileo Images', Icarus, vol. 135, no. 1, pp. 95-106. https://doi.org/10.1006/icar.1998.5968
Clark BE, Helfenstein P, Veverka J, Ockert-Bell M, Sullivan RJ, Geissler PE et al. Multispectral Terrain Analysis of Europa from Galileo Images. Icarus. 1998 Sep;135(1):95-106. https://doi.org/10.1006/icar.1998.5968
Clark, Beth E. ; Helfenstein, Paul ; Veverka, Joseph ; Ockert-Bell, Maureen ; Sullivan, R. J. ; Geissler, P. E. ; Phillips, C. B. ; McEwen, Alfred S. ; Greeley, R. ; Neukum, G. ; Denk, T. ; Klaasen, K. / Multispectral Terrain Analysis of Europa from Galileo Images. In: Icarus. 1998 ; Vol. 135, No. 1. pp. 95-106.
@article{994b88d697e14f1399d952e0454d6558,
title = "Multispectral Terrain Analysis of Europa from Galileo Images",
abstract = "Galileo's Solid State Imaging camera recorded six images at wavelengths from 0.41 to 0.99 μm of Europa's trailing hemisphere (~1.6 km/pixel resolution) during the G1 orbit (1st orbit - target Ganymede) of the nominal mission. We have photometrically corrected these data and extracted spectra representing Europa's diverse geologic terrains. The goals of the analysis of these spectra are (1) to determine whether Europa's geologic units differ spectrally from one another, (2) to determine the number of color components necessary to explain Europa's dark material spectral behavior, and (3) to examine how europan dark materials may change in color with time. Our data indicate that europan dark spots, lineaments and triple band side materials represent a single {"}dark{"} and reddish endmember component. We see no evidence for more than one dark endmember; however the dark endmember seen in these G1 data is probably not a {"}pure{"} exposure of europan dark material. Mottled terrains, brighter lineaments, and aging triple bands can be modeled by a mixture of bright plains materials and the dark component. Exposures of europan dark materials may thus be brightening with time, eventually blending into the surrounding bright plains.",
author = "Clark, {Beth E.} and Paul Helfenstein and Joseph Veverka and Maureen Ockert-Bell and Sullivan, {R. J.} and Geissler, {P. E.} and Phillips, {C. B.} and McEwen, {Alfred S.} and R. Greeley and G. Neukum and T. Denk and K. Klaasen",
year = "1998",
month = "9",
doi = "10.1006/icar.1998.5968",
language = "English (US)",
volume = "135",
pages = "95--106",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",
number = "1",

}

TY - JOUR

T1 - Multispectral Terrain Analysis of Europa from Galileo Images

AU - Clark, Beth E.

AU - Helfenstein, Paul

AU - Veverka, Joseph

AU - Ockert-Bell, Maureen

AU - Sullivan, R. J.

AU - Geissler, P. E.

AU - Phillips, C. B.

AU - McEwen, Alfred S.

AU - Greeley, R.

AU - Neukum, G.

AU - Denk, T.

AU - Klaasen, K.

PY - 1998/9

Y1 - 1998/9

N2 - Galileo's Solid State Imaging camera recorded six images at wavelengths from 0.41 to 0.99 μm of Europa's trailing hemisphere (~1.6 km/pixel resolution) during the G1 orbit (1st orbit - target Ganymede) of the nominal mission. We have photometrically corrected these data and extracted spectra representing Europa's diverse geologic terrains. The goals of the analysis of these spectra are (1) to determine whether Europa's geologic units differ spectrally from one another, (2) to determine the number of color components necessary to explain Europa's dark material spectral behavior, and (3) to examine how europan dark materials may change in color with time. Our data indicate that europan dark spots, lineaments and triple band side materials represent a single "dark" and reddish endmember component. We see no evidence for more than one dark endmember; however the dark endmember seen in these G1 data is probably not a "pure" exposure of europan dark material. Mottled terrains, brighter lineaments, and aging triple bands can be modeled by a mixture of bright plains materials and the dark component. Exposures of europan dark materials may thus be brightening with time, eventually blending into the surrounding bright plains.

AB - Galileo's Solid State Imaging camera recorded six images at wavelengths from 0.41 to 0.99 μm of Europa's trailing hemisphere (~1.6 km/pixel resolution) during the G1 orbit (1st orbit - target Ganymede) of the nominal mission. We have photometrically corrected these data and extracted spectra representing Europa's diverse geologic terrains. The goals of the analysis of these spectra are (1) to determine whether Europa's geologic units differ spectrally from one another, (2) to determine the number of color components necessary to explain Europa's dark material spectral behavior, and (3) to examine how europan dark materials may change in color with time. Our data indicate that europan dark spots, lineaments and triple band side materials represent a single "dark" and reddish endmember component. We see no evidence for more than one dark endmember; however the dark endmember seen in these G1 data is probably not a "pure" exposure of europan dark material. Mottled terrains, brighter lineaments, and aging triple bands can be modeled by a mixture of bright plains materials and the dark component. Exposures of europan dark materials may thus be brightening with time, eventually blending into the surrounding bright plains.

UR - http://www.scopus.com/inward/record.url?scp=0001874738&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001874738&partnerID=8YFLogxK

U2 - 10.1006/icar.1998.5968

DO - 10.1006/icar.1998.5968

M3 - Article

AN - SCOPUS:0001874738

VL - 135

SP - 95

EP - 106

JO - Icarus

JF - Icarus

SN - 0019-1035

IS - 1

ER -