Astrogeology Science Center

1999 - Present

Space Scientist - U.S. Geological Survey, Flagstaff AZ. Research: Spectral analysis of Martian polar regions using data from MGS TES, Mars Odyssey THEMIS, and MRO CRISM. Thermal surface properties of 4 Vesta.

Oct 2010 - Jan 2011

Acting Science Center Director - U.S. Geological Survey, Flagstaff AZ.

1997 - 1999

Remote Sensing Analyst - Contracted with the U.S. Geological Survey, Flagstaff, AZ, and Oak Ridge Associated Universities, Oak Ridge, TN. Research: Spectral analysis of Martian polar regions using data from MGS TES.

1996 - 1997

Staff Lecturer - University of Wyoming, Laramie, WY. Research: Multivariate analysis of galaxy spectra.

Education

Civilian Education

  • Ph.D.,Astrophysics, University of Wyoming, Laramie, WY, 1996
  • M.S., Astrophysics, Iowa State University, Ames, IA, 1988
  • B.A., Physics/Mathematics, Drake University, Des Moines, IA, 1985

Military Education

  • Engineer Officer Basic Course (1988)
  • Artillery Officer Advance Course (1992)
  • Combined Arms Service and Staff School (1995)
  • Command General Staff College (2000)
  • Quartermaster Officer Advance Course (2003)

Research

  • Mars Polar Processes: Specifically - the CO2 cycle and polar energy balance.
  • Mars Thermal Inertia Studies: Specifically - the use of 2-layer thermal inertia models to detect sub-surface ice.
  • Mars Aeolian Studies: Specially - the global inventory and characterization of Mars dunes.
  • Cave Detection using the Thermal Infrared Remote Sensing: Specifically - using ground truth thermal characterization of terrestrial caves to develope techniques and procedures for detecting caves on Earth, the Moon, and Mars.

Missions

  • Co-Investigator on Mars Odyssey THermal EMission Imaging System (THEMIS).
  • Co-Investigator on Mars Reconnaissance Orbiter (MRO) Compact Reconnaissance Imaging Spectrometer for Mars (CRISM).
  • Selected as a Dawn at Vesta Participating Scientist.

Service

Military Service

Lieutenant Colonel (Retired) Timothy N. Titus

Last Position prior to Retirement

Chief of Logistics
Camp Navajo
Arizona National Guard
Bellemont, AZ

Civil Service

  • Participating Scientist on DAWN at Vesta
  • Extensive experience analyzing Mars Odyssey (ODY) THermal Emission IMaging System (THEMIS) data
  • Extensive experience extracting and analyzing Mars Global Surveyor (MGS) Thermal Emission Spectrometer (TES) data
  • Extensive knowledge of several programming languages, including IDL
  • Writes and maintains a GUI software package that enhances the analysis of TES spectral data
  • Extensive knowledge of multivariate analysis techniques, especially Principal Components Analysis (PCA)

Bibliography

  • Cornwall, C.; Titus, T. N., 2010, A comparison of Martian north and south polar cold spots and the long-term effects of the 2001 global dust storm, J. Geophys. Res., Volume 115, Issue E6, CiteID E06011.
  • Cull, S.; Arvidson, R.E.; Mellon, M.; Wiseman, S.; Clark, R.; Titus, T.N.; Morris, R.V.; McGuire, P.2010, Seasonal H2O and CO2 ice cycles at the Mars Phoenix landing site: 1. Prelanding CRISM and HiRISE observations, J. Geophys. Res., Volume 115, Issue 1, CiteID E00D16.
  • Mellon, M. T., Boynton, W. V., Feldman, W. C., Arvidson, R. E., Titus, T. N., Bandfield, J. L., Putzig, N., and Sizemore, H., 2008, A Pre-Landing Assessment of the Ice-Table Depth and Ground-Ice Characteristics in Martian Permafrost at the Phoenix Landing Site, J. Geophys. Res., Volume 113, Issue E12, CiteID E00A25, doi:10.1029/2007JE003067.
  • Titus, T.N., W . M . Calvin, H . H . Kieffer, Y. Langevin, T.H. Prettyman, Martian Polar Processes, Ch. 25 in Bell III, J. F., ed., 2008, The Martian Surface: Composition, Mineralogy, and Physical Properties, Cambridge University Press. ISBN: 9780521866989.
  • Wynne, J. Judson; Titus, Timothy N.; Chong Diaz, Guillermo, 2008, On developing thermal cave detection techniques for earth, the moon and mars, Earth and Planetary Science Letters, Volume 272, Issue 1-2, p. 240-250.
  • Cushing, Glen E.; Titus, Timothy N., 2008, MGS-TES thermal inertia study of the Arsia Mons Caldera, Journal of Geophysical Research, Volume 113, Issue E6, CiteID E06006
  • Titus, Timothy N.; Colaprete, Anthony; Prettyman, Thomas H., 2008 Introduction to planetary and space science special issue: Mars polar processes, Planetary and Space Science, Volume 56, Issue 2, p. 147-149.
  • Calvin, W. M.; Titus, T. N., 2008 Summer season variability of the north residual cap of Mars as observed by the Mars Global Surveyor Thermal Emission Spectrometer (MGS-TES), Planetary and Space Science, Volume 56, Issue 2, p. 212-226.
  • Wagstaff, Kiri L.; Titus, Timothy N.; Ivanov, Anton B.; CastañRebecca; Bandfield, Joshua L., 2008 Observations of the north polar water ice annulus on Mars using THEMIS and TES, Planetary and Space Science, Volume 56, Issue 2, p. 256-265.
  • Hayward, Rosalyn K.; Mullins, Kevin F.; Fenton, Lori K.; Hare, Trent M.; Titus, Timothy N.; Bourke, Mary C.; Colaprete, Anthony; Christensen, Philip R., 2007, Mars Global Digital Dune Database and initial science results, Journal of Geophysical Research, Volume 112, Issue E11, CiteID E11007
  • Cushing, G. E.; Titus, T. N.; Wynne, J. J.; Christensen, P. R., 2007 THEMIS observes possible cave skylights on Mars Geophysical Research Letters, Volume 34, L17201
  • Armstrong, J. C.; Nielson, S. K.; Titus, T. N., 2007, Survey of TES high albedo events in Mars' northern polar craters, Geophysical Research Letters, Volume 34, Issue 1, CiteID L01202
  • Kieffer, Hugh H.; Christensen, Philip R.; Titus, Timothy N.,2006, CO2 jets formed by sublimation beneath translucent slab ice in Mars' seasonal south polar ice cap, Nature, Volume 442, Issue 7104, pp. 793-796.
  • Johnson, J., Staid, M., Titus, T., Becker, K., 2006, Shocked plagioclase signatures in Thermal Emission Spectrometer data of Mars, Icarus, Volume 180, Issue 1, p. 60-74.
  • Titus, T., 2005, Thermal infrared and visual observations of a water ice lag in the Mars southern summer, Geophys. Res. Lett., Vol. 32, L24204, doi:10.1029/2005GL024211.
  • Cushing, G., Titus, T., Christensen, P.,2005, THEMIS VIS and IR observations of a high-altitude Martian dust devil, Geophys. Res. Lett., Vol. 32, L23202, doi:10.1029/2005GL024478.
  • Titus, T., Colaprete,A., 2005, Mars Atmospheric Surface Interactions and the CO2 Cycle, Eos Trans. AGU, 86(46), 462, doi:10.1029/2005EO460006.
  • Colaprete, A, Barnes, J., Haberle, R., Hollingsworth, J., Kieffer, H., Titus, T.,2005, Albedo of the south pole on Mars determined by topographic forcing of atmosphere dynamics, Nature, Volume 435, Issue 7039, pp. 184-188.
  • Armstrong, J., Titus, T., Kieffer, H., 2005, Evidence for subsurface water ice in Korolev crater, Icarus, Volume 174, Issue 2, p. 360-372.
  • Eluszkiewicz, J., Moncet, J-L., Titus, T., Hansen, G., 2005, A microphysically-based approach to modeling emissivity and albedo of the martian seasonal caps, Icarus, Volume 174, Issue 2, p. 524-534.
  • James, P., Hansen, G., Titus, T., 2005,The carbon dioxide cycle, Advances in Space Research, Volume 35, Issue 1, p. 14-20.
  • Prettyman, T., Titus, T., 2004, Exploring Martian Polar Atmospheric Circulation and Surface Interactions, Eos Trans. AGU, 85(41), 403, doi:10.1029/2004EO410005.
  • Haberle, R., Mattingly, B., Titus, T., 2004, Reconciling different observations of the CO2 ice mass loading of the Martian north polar cap, Geophysical Research Letters, Volume 31, Issue 5, CiteID L05702.
  • Titus, T., 2004, Mars: Water, water everywhere, Nature, Volume 428, Issue 6983, pp. 610-611.
  • Titus, T., Kieffer, H., Christensen, P.,2003, Exposed Water Ice Discovered near the South Pole of Mars, Science, Vol. 299, Issue 5609, pp. 1048-1051.
  • Kieffer, H., Titus, T.,2001, TES mapping of Mars' north seasonal cap, Icarus, Vol. 154, Issue 1, pp. 162-180.
  • Titus, T., Kieffer, H, 2001, Slab Ice and Snow Flurries in the Martian Polar Night, J. Geophys. Res. Vol. 106 , No. E10 , p. 23,181.
  • Kieffer, H., Titus, T., Mullins, K., Christensen, P.,1999, Mars south polar spring and summer behavior observed by TES: Season cap evolution controlled by frost grain size., J.Geophys. Res., vol. 105, no. E4, 9653-9699.
  • Titus, T., Spillar, E., Johnson, P.,1997, Population analysis of faint galaxies with mixture modeling., Astron. J., 114, 958.