Publications

Journal Articles

Grimm, R.E. A.C. Barr, K.P. Harrison, D.E. Stillman, K.L. Neal, M.A. Vincent, and G.T. Delory, 2011, Measurement of Thermal Lithospheric Thickness of Venus using Aerial Electromagnetic Sounding, Icarus,, in press.

Stillman, D.E. and R.E. Grimm, 2011, Dielectric Signatures of Adsorbed and Salty Liquid Water at the Phoenix Landing Site, Mars, J. Geophys. Res., 116, E09005, doi: 10.1029/2011JE003838.

Barr, A.C. and D.E. Stillman, 2011, Strain History of Ice Shells of the Galilean Satellites from Radar Detection of Crystal Orientation Fabric, Geophys. Res. Lett., 38, L06203, doi: 10.1029/2010GL046616.

Stillman, D.E., and R.E. Grimm, 2011, Radar Penetrates Only the Youngest Geological Units on Mars, J. Geophys. Res., 116, E03001, doi: 10.1029/2010JE003661.

Stillman, D.E., Stillman, D.E., R.E. Grimm, and S.F. Dec, 2010, Low-Frequency Electrical Properties of Ice-Silicate Mixtures, J. Phys. Chem. B, 114, 6065-6073. Supplement Online Material

Grimm, R.E., and D.E. Stillman, 2009, Comment on "Subsurface water detection on Mars by astronauts using a seismic refraction method: Tests during a manned Mars simulation," by V. Pletser et al., Acta Astronautica, 64, 654-655.

Grimm, R.E., D.E. Stillman, S.F. Dec, and M.A. Bullock, 2008, Low-Frequency Electrical Properties of Polycrystalline Saline Ice and Salt Hydrates, J. Phys. Chem. B, 112, 15382-1590.

Stillman, D.E., and G.R. Olhoeft, 2008, Frequency and Temperature Dependence in Electromagnetic Properties of Martian Analog Minerals, J. Geophys. Res., 113, E09005, doi:10.1029/2007JE002977.

Stillman, D.E., 2006, Frequency and Temperature Dependence in Electromagnetic Properties of Martian Analog Minerals., PhD thesis, Dept. of Geophysics, Colorado School of Mines, Golden, 199 p. + DVD.

Conference Proceedings

Stillman, D.E., J. A. MacGregor, and R.E. Grimm, 2011, Insights into the nature of radar attenuation through impure ice from broadband dielectric spectroscopy of polar ice cores, Eos Trans. AGU, Fall Meet. Suppl., Abstract P13G-03.

Stillman, D.E., and R.E. Grimm, 2011, Low-Frequency Electrical Properties of Ice-Silicate Mixtures, 2nd International Workshop on Induced Polarization in Near-Surface Geophysics, October 31 - November 2, Golden, CO, p, 27.

Stillman, D.E., and R.E. Grimm, 2011, Dielectric Signatures of Adsorbed and Salty Liquid Water at the Phoenix Landing Site, Mars, 5th Conf. Mars Polar Science and Exploration, 12-16 September, Fairbanks, AK, 6045.pdf.

Dinwiddie, C.L., R.N. Mcginnis, D.E. Stillman, K.L. Bjella, R.E. Grimm, 2011, Late-Winter Phase State of Water in the Great Kobuk Sand Dunes, Alaska, and Testable Hypotheses for a Perching Mechanism, 5th Conf. Mars Polar Science and Exploration, 12-16 September, Fairbanks, AK, 6035.pdf.

Stillman, D.E., J. A. MacGregor, A. C. Barr, R. E. Grimm, D. D. Blankenship, D. P. Winebrenner, 2011, A Foundation for Orbital Radar Sounding of Europa from new Measurements of the Broadband Dielectric Properties of Terrestrial Polar Ice Cores, 42nd Lunar and Planetary Science Conf., 7-11 March, The Woodlands, TX, 2193.pdf. Poster

Stillman, D.E., and R.E. Grimm, 2011, Heterogeneous Adsorbed and Salty Liquid Water at the Phoenix landing site, Mars, 42nd Lunar and Planetary Science Conf., 7-11 March, The Woodlands, TX, 2578.pdf.

Dinwiddie, C.L., R.N. Mcginnis, D.E. Stillman, K.L. Bjella, R.E. Grimm, 2011, Geophysical Mars Analog Studies of Multiphase Water in the Great Kobuk Sand Dunes, Northwestern Alaska, 42nd Lunar and Planetary Science Conf., 7-11 March, The Woodlands, TX, 2501.pdf.

Winebrenner, D.P., D.E. Stillman, R.E. Grimm, 2011, Detectability by Radar of Salts in Martian Ice Deposits, 42nd Lunar and Planetary Science Conf., 7-11 March, The Woodlands, TX, 2532.pdf.

Grimm, R.E., and D.E. Stillman, 2011, Progress in Prospecting for Near-surface H2O on the Moon and Mars with Dielectric Spectroscopy, 42nd Lunar and Planetary Science Conf., 7-11 March, The Woodlands, TX, 2550.pdf.

Grimm, R.E., A.C. Barr, K.P. Harrison, D.E. Stillman, K.L. Neal, M.A. Vincent, and G.T. Delory, 2011, Measurement of Thermal Lithospheric Thickness of Venus using Aerial Electromagnetic Sounding, 42nd Lunar and Planetary Science Conf., 7-11 March, The Woodlands, TX, 1551.pdf.

Lenferink, H.J., W.B. Durham, A.V. Pathare, L.A. Stern, D.E. Stillman, 2011, Creep of Water Ice Plus Magnesium Perchlorate Hydrate, 42nd Lunar and Planetary Science Conf., 7-11 March, The Woodlands, TX, 1909.pdf.

Stillman, D.E., D.P. Winebrenner, R.E. Grimm, A. Pathare, 2010, The Radar Effects of Perchlorate-Doped Ice in the Martian Polar Layered Deposits, Eos Trans. AGU, 91(52), Fall Meet. Suppl., Abstract P34A-03. (invited)

Mcginnis, R.N., C.L. Dinwiddie, D.E. Stillman, K. Bjella, D.M. Hooper, and R.E. Grimm, 2010, Insights from a Geophysical and Geomorphological Mars Analog Field Study at the Great Kobuk Sand Dunes, Northwestern Alaska, Eos Trans. AGU, 91(52), Fall Meet. Suppl., Abstract P23A-1607.

Dinwiddie, C.L., D.M. Hooper, T.I. Michaels, R.N. Mcginnis, D.E. Stillman, K. Bjella, S. Stothoff, G.R. Walter, M. Necsoiu, R.E. Grimm, 2010, Great Kobuk Sand Dunes, Alaska: A Terrestrial Analog Site for Polar, Topographically Confined Martian Dune Fields, Eos Trans. AGU, 91(52), Fall Meet. Suppl., Abstract P13B-1369.

Stillman, D.E., and R.E. Grimm, 2010, Mechanisms for the Attenuation of SHARAD Energy, 41st Lunar and Planetary Science, 1-5 March, The Woodlands, TX, 2143.pdf.

Stillman, D.E., and R.E. Grimm, 2010, Dielectric Spectroscopy for Scientific and Resource Characterization of Lunar Regolith, Ground-based Geophysics on the Moon, 21-22 January, Tempe, AZ, 3018.pdf.

Stillman, D.E., and R.E. Grimm, 2009, SHARAD Penetrates only the Youngest Geological Units on Mars, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract P13B-1276.

Grimm, R.E., D.E. Stillman J.A. MacGregor, C.L Dinwiddie, D.M. Hooper, 2009, New insights into the electrical properties of ice and permafrost, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract NS42A-05.

Grimm, R.E. and D.E. Stillman, 2009, Electrical properties of saline ices and ice-silicate mixtures: geophysical and astrobiological consequences, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract MR22A-05. (invited)

Dinwiddie, C.L., R.N. McGinnis, D.E. Stillman, R.E. Grimm, D.M. Hooper, K. Bjella, 2009 Integrated Geophysical Examination of the CRREL Permafrost Tunnel's Fairbanks Silt Units, Fox, Alaska, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C41A-0429.

Stillman, D.E., R.E. Grimm, and K.P. Harrison, 2009, The Anomalous Radar Transparency of Central Elysium Planitia and Amazonis Planitia, 40th Lunar and Planetary Science Conference, 23-27 March, The Woodlands, TX, 2412.pdf.

Stillman, D.E., and R.E. Grimm, 2008, Electrical Properties of Ice and Implications for Solar System Exploration, 39th LPSC, 10-14 March, League City, TX, 2277.pdf.

Grimm, R.E. and D.E. Stillman, 2008, LPSC, On the Origin of Widespread Subsurface Radar Attenuation at Mars, 39th LPSC, 10-14 March, League City, TX, 2251.pdf.

Grimm, R.E. and D.E. Stillman, 2008, Electrical Properties of Saline Ices, Salt Hydrates, and Ice-Silicate Mixtures: Applications to Solar-System Exploration, The Science of Solar System Ices, 5-8 May, Oxnard, Ca, 9062.pdf. (invited)

Stillman, D.E. and R.E. Grimm, 2007, Electrical Properties of Ice and Ice-Silicate Mixtures for Mars Exploration, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract P14A-04

Stillman, D.E. and R.E. Grimm, 2007, Scientific and Resource Characterization of Lunar Regolith using Dielectric Spectroscopy, LEAG meeting, 1-5 October, Houston, TX, 3014.pdf.

Grimm, R.E., C.L Dinwiddie, D.E. Stillman, R.N. McGinnis, 2007, Frequency Dependence of Attenuation in Ground-Penetrating Radar: Insights from the Bishop Tuff, 77th Annual SEG Meeting, 23-28 September, San Antonio, TX, 5p.

Stillman, D.E., and R.E. Grimm, 2007, Laboratory Measurements of the Electrical properties of Water Ice-Silicate Mixtures and Implications for Dielectric Spectroscopy and Radar on Mars, 7th International Conference on Mars, Pasadena, CA, 3311.pdf.

Dinwiddie C.L., R.E. Grimm, R.N. McGinnis, D.E. Stillman, 2007, Moderately to Poorly Welded Tuff, Bishop, California: Geophysical and Geological Characterization to Determine the Source of Radar Scattering, 7th International Conference on Mars, Pasadena, CA, 3334.pdf.

Stillman, D.E., and R.E. Grimm, 2007, Dielectric Spectroscopy mapping of Subsurface Ice on the Moon and Mars, 37th Lunar and Planetary Science, Houston, Texas, 1944.pdf.

Grimm, R.E., and Stillman, D.E., 2007, Abundance and Electrical Properties of Interfacial Water in the Martian Regolith, 37th Lunar and Planetary Science, Houston, Texas, 2249.pdf.

Stillman, D.E., and G.R. Olhoeft, 2006, Electromagnetic Properties of Martian Analog Minerals at RADAR Frequencies and Martian Temperatures, 36th Lunar and Planetary Science, Houston, Texas, 2002.pdf.

Grimm, R.E., D.E. Stillman, E Heggy, C.L. Dinwiddie, R.N. McGinnis, 2006, Moderately to Poorly Welded Tuff, Bishop, California: Broadband Performance of Ground-Penetrating Radar, EOS Trans. AGU, 87(52), Fall Meet. Suppl., Abstract P51G-06.

Dinwiddie C.L., R.E. Grimm, R.N. McGinnis, D.E. Stillman, E Heggy, 2006, Moderately to Poorly Welded Tuff, Bishop, California: Geophysical and Geological Characterization to Determine the Source of Radar Scattering, EOS Trans. AGU, 87(52), Fall Meet. Suppl., Abstract P51G-05.

R.N. McGinnis, Dinwiddie C.L., D.E. Stillman, E Heggy, R.E. Grimm, 2006, Pyroclastic and Volcaniclastic Deposits Near Bishop, California: Geologic Controls on Near-Surface Electrical Resistivity and Radar Data, EOS Trans. AGU, 87(52), Fall Meet. Suppl., Abstract P31B-0132.

Stillman, D.E., and G.R. Olhoeft, 2005, EM Properties of Magnetic Minerals at RADAR Frequencies, Workshop on Radar Investigations of Planetary and Terrestrial Environments, February 7-10, 2005, Houston, Texas. 6029.pdf

Stillman, D.E., and G.R. Olhoeft , 2004, GPR and Magnetic Minerals at Mars Temperatures, 10th Int'l Conf. on Ground Penetrating Radar, June 21-24, 2004,TU Delft, the Netherlands, p. 735-738, 735.pdf

Olhoeft, G. R., D. B. Sinex, K. A. Sander, M. M. Lagmanson, D.E. Stillman, S. Lewis, B.T. Clark, E. Wallin, and J.P. Kauahikaua, 2000, Hot and cold lava tube characterization with ground penetrating radar: in GPR2000, Proc. of the 8th International Conference on Ground Penetrating Radar, Gold Coast, Australia, 22-25 May 2000, D. A. Noon, G.F. Stickley, and D. Longstaff, eds., SPIE vol. 4084, p. 482-487.

Websites

Measurements from my thesis are posted here