Astrogeology Science Center

Publications

Filter Total Items: 771
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Year Published: 2017

Evidence for the interior evolution of Ceres from geologic analysis of fractures

Ceres is the largest asteroid belt object, and the Dawn spacecraft observed Ceres since 2015. Dawn observed two morphologically distinct linear features on Ceres's surface: secondary crater chains and pit chains. Pit chains provide unique insights into Ceres's interior evolution. We interpret pit chains called the Samhain Catenae as the surface...

Scully, Jennifer E. C.; Buczkowski, Debra; Schmedemann, Nico; Raymond, Carol A.; Castillo-Rogez, Julie C.; Scott King; Bland, Michael T.; Ermakov, Anton; O'Brien, D.P.; Marchi, S.; Longobardo, A.; Russell, C.T.; Fu, R.R.; Neveu, M.
Scully, J. E. C., Buczkowski, D. L., Schmedemann, N., Raymond, C. A., Castillo-Rogez, J. C., King, S. D., … Neveu, M. (2017). Evidence for the interior evolution of Ceres from geologic analysis of fractures. Geophysical Research Letters, 44, 9564–9572. https://doi.org/10.1002/2017GL075086

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Year Published: 2017

Basalt–trachybasalt samples in Gale Crater, Mars

The ChemCam instrument on the Mars Science Laboratory (MSL) rover, Curiosity, observed numerous igneous float rocks and conglomerate clasts, reported previously. A new statistical analysis of single‐laser‐shot spectra of igneous targets observed by ChemCam shows a strong peak at ~55 wt% SiO2 and 6 wt% total alkalis, with a minor...

Edwards, Peter H.; Bridges, John C.; Wiens, Roger C.; Anderson, Ryan B.; Dyar, M. Darby; Fisk, Martin; Thompson, Lucy; Gasda, Patrick J.; Filiberto, Justin; Schwenzer, Susanne P.; Blaney, Diana L.; Hutchinson, Ian

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Year Published: 2017

Preface: The lunar reconnaissance orbiter

When the call for papers for a special issue of Icarus devoted to analysis of data from the Lunar Reconnaissance Orbiter mission was announced in March 2015 we envisioned a single issue with only a possibility of a second. We certainly were gratified by the response from within and outside the LRO instrument teams such that we were compelled to...

Keller, John W; Gaddis, Lisa R.; Petro, Noah E.; Aharonson, Oded
Keller, John W., Gaddis, L., Petro, N., and Aharonson, O., 2017, Preface--The Lunar Reconnaissance Orbiter: Icarus, v. 298, 1 p., https://doi.org/10.1016/j.icarus.2017.09.001.

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Year Published: 2017

CO2 cycle

This chapter discusses the use of models, observations, and laboratory experiments to understand the cycling of CO2 between the atmosphere and seasonal Martian polar caps. This cycle is primarily controlled by the polar heat budget, and thus the emphasis here is on its components, including solar and infrared radiation, the effect of clouds (water...

Titus, Timothy N.; Byrne, Shane; Colaprete, Anthony; Forget, Francois; Michaels, Timothy I.; Prettyman, Thomas H.

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Year Published: 2017

Community tools for cartographic and photogrammetric processing of Mars Express HRSC images

The High Resolution Stereo Camera (HRSC) on the Mars Express orbiter (Neukum et al. 2004) is a multi-line pushbroom scanner that can obtain stereo and color coverage of targets in a single overpass, with pixel scales as small as 10 m at periapsis. Since commencing operations in 2004 it has imaged ~ 77 % of Mars at 20 m/pixel or better. The...

Wu, B.; Di, K.; Oberst, J.; Karachevtseva, I.; Kirk, Randolph L.; Howington-Kraus, Elpitha; Edmundson, Kenneth L.; Redding, Bonnie L.; Galuszka, Donna M.; Hare, Trent M.; Gwinner, K.
Kirk, R.L., Howington-Kraus, E., Edmundson, K., Redding, B., Galuszka, D., Hare, T., and Gwinner, K.: Community tools for cartographic and photogrammetric processing of Mars express HiRISE images, International Archives of Photogrammetry and Remote Sensing, v. XLII-3/W1, p. 69-76, https://doi.org/10.5194/isprs-archives-XLII-3-W1-69-2017, 2017.

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Year Published: 2017

Correcting spacecraft jitter in HiRISE images

Mechanical oscillations or vibrations on spacecraft, also called pointing jitter, cause geometric distortions and/or smear in high resolution digital images acquired from orbit. Geometric distortion is especially a problem with pushbroom type sensors, such as the High Resolution Imaging Science Experiment (HiRISE) instrument on board the Mars...

Wu, B.; Di, K.; Oberst, J.; Karachevtseva, I.; Sutton, S. S.; Boyd, A.K.; Kirk, Randolph L.; Cook, Debbie; Backer, Jean; Fennema, A.; Heyd, R.; McEwen, A.S.; Mirchandani, S.D.
Sutton, S.S., Boyd, A.K., Kirk, R.L., Cook, D., Backer, J.W., Fennema, A., Heyd, R., McEwen, A.S., and Mirchandani, S.D., 2017, Correcting spacecraft jitter in HiRISE images: International Archives of Photogrammetry and Remote Sensing, v. XLII-3/W1, p. 141-148, https://doi.org/10.5194/isprs-archives-XLII-3-W1-141-2017.

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Year Published: 2017

Spatial data analytics on heterogeneous multi- and many-core parallel architectures using python

Parallel vector spatial analysis concerns the application of parallel computational methods to facilitate vector-based spatial analysis. The history of parallel computation in spatial analysis is reviewed, and this work is placed into the broader context of high-performance computing (HPC) and parallelization research. The rise of cyber...

Laura, Jason R.; Rey, Sergio J.
Laura, Jason, and Rey, Sergio J., 2016, Spatial Data Analytics on Heterogeneous Multi- and Many-Core Parallel Architectures Using Python, in Shekhar, S., et al., eds.: Encyclopedia of GIS, Springer, 10 p., doi:10.1007/978-3-319-23519-6_1569-1.

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Year Published: 2017

The Colour and Stereo Surface Imaging System (CaSSIS) for the ExoMars Trace Gas Orbiter

The Colour and Stereo Surface Imaging System (CaSSIS) is the main imaging system onboard the European Space Agency’s ExoMars Trace Gas Orbiter (TGO) which was launched on 14 March 2016. CaSSIS is intended to acquire moderately high resolution (4.6 m/pixel) targeted images of Mars at a rate of 10–20 images per day from a roughly circular orbit 400...

Thomas, N.; Cremonese, G.; Ziethe, R.; Gerber, M.; Brändli, M.; Bruno, G.; Erismann, M.; Gambicorti, L.; Gerber, T.; Ghose, K.; Gruber, M.; Gubler, P.; Mischler, H.; Jost, J.; Piazza, D.; Pommerol, A.; Rieder, M.; Roloff, V.; Servonet, A.; Trottmann, W.; Uthaicharoenpong, T.; Zimmermann, C.; Vernani, D.; Johnson, M.; Pelò, E.; Weigel, T.; Viertl, J.; De Roux, N.; Lochmatter, P.; Sutter, G.; Casciello, A.; Hausner, T.; Ficai Veltroni, I.; Da Deppo, V.; Orleanski, P.; Nowosielski, W.; Zawistowski, T.; Szalai, S.; Sodor, B.; Tulyakov, S.; Troznai, G.; Banaskiewicz, M.; Bridges, J.C.; Byrne, S.; Debei, S.; El-Maarry, M. R.; Hauber, E.; Hansen, C.J.; Ivanov, A.; Keszthelyil, L.; Kirk, Randolph L.; Kuzmin, R.; Mangold, N.; Marinangeli, L.; Markiewicz, W. J.; Massironi, M.; McEwen, A.S.; Okubo, Chris H.; Tornabene, L.L.; Wajer, P.; Wray, J.J.
Thomas, N., Cremonese, G., Ziethe, R., Gerber, M., Brändli, M., Bruno, G., … Wray, J. J. (2017). The Colour and Stereo Surface Imaging System (CaSSIS) for the ExoMars Trace Gas Orbiter. Space Science Reviews, 212(3–4), 1897–1944. https://doi.org/10.1007/s11214-017-0421-1

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Year Published: 2017

Monitoring gas and heat emissions at Norris Geyser Basin, Yellowstone National Park, USA based on a combined eddy covariance and Multi-GAS approach

We quantified gas and heat emissions in an acid-sulfate, vapor-dominated area (0.04-km2) of Norris Geyser Basin, located just north of the 0.63 Ma Yellowstone Caldera and near an area of anomalous uplift. From 14 May to 3 October 2016, an eddy covariance system measured half-hourly CO2, H2O and sensible (H) and latent (LE) heat fluxes and a...

Lewicki, Jennifer L.; Kelly, Peter J.; Bergfeld, Deborah; Vaughan, R. Greg; Lowenstern, Jacob B.
Lewicki, J.L., P.J. Kelly, D. Bergfeld, R.G. Vaughan, J.B. Lowenstern. Monitoring gas and heat emissions at Norris Geyser Basin, Yellowstone National Park, USA based on a combined eddy covariance and Multi-GAS approach. Journal of Volcanology and Geothermal Research, 347, 312-326, https://doi.org/10.1016/j.jvolgeores.2017.10.001, 2017.

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Year Published: 2017

Origin of discrepancies between crater size-frequency distributions of coeval lunar geologic units via target property contrasts

Recent work on dating Copernican-aged craters, using Lunar Reconnaissance Orbiter (LRO) Camera data, re-encountered a curious discrepancy in crater size-frequency distribution (CSFD) measurements that was observed, but not understood, during the Apollo era. For example, at Tycho, Copernicus, and Aristarchus craters, CSFDs of impact melt deposits...

Van der Bogert, Carolyn H.; Hiesinger, Harald; Dundas, Colin M.; Kruger, T.; McEwen, Alfred S.; Zanetti, Michael; Robinson, Mark S.
Van der Bogert, C. H., Hiesinger, H., Dundas, C. M., Kruger, T., Zanetti, M., McEwen, A. S., Robinson, M. S., 2017. Origins of discrepancies between crater size-frequency distributions of coeval lunar geologic units. Icarus, 298, 49-63, doi:10.1016/j.icarus.2016.11.040.

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Year Published: 2017

Martian cave air-movement via Helmholtz resonance

Infrasonic resonance has previously been measured in terrestrial caves by other researchers, where Helmholtz resonance has been suggested as the plausible mechanism resulting in periodic wind reversals within cave entrances. We extend this reasoning to possible Martian caves, where we examine the characteristics of four atypical pit craters (APCs...

Williams, Kaj; Titus, Timothy N.; Okubo, Chris; Cushing, Glen E.
Williams, Kaj E.; Timothy N. Titus; Chris H. Okubo; and Glen E. Cushing. 2017. Martian cave air-movement via Helmholtz resonance. International Journal of Speleology, 46: 439-444.

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Year Published: 2017

The interior structure of Ceres as revealed by surface topography

Ceres, the largest body in the asteroid belt (940 km diameter), provides a unique opportunity to study the interior structure of a volatile-rich dwarf planet. Variations in a planetary body's subsurface rheology and density affect the rate of topographic relaxation. Preferential attenuation of long wavelength topography (≥150 km) on Ceres suggests...

Fu, Roger R.; Ermakov, Anton; Marchi, Simone; Castillo-Rogez, Julie C.; Raymond, Carol A.; Hager, Bradford; Zuber, Maria; King, Scott D.; Bland, Michael T.; De Sanctis, Maria Cristina; Preusker, Frank; Park, Ryan S.; Russell, Christopher T.