Publications
Filter Total Items: 922
Ancient Martian aeolian processes and palaeomorphology reconstructed from the Stimson formation on the lower slope of Aeolis Mons, Gale crater, Mars
Reconstruction of the palaeoenvironmental context of Martian sedimentary rocks is central to studies of ancient Martian habitability and regional palaeoclimate history. This paper reports the analysis of a distinct aeolian deposit preserved in Gale crater, Mars, and evaluates its palaeomorphology, the processes responsible for its deposition, and its implications for Gale crater geological history
Authors
Steve G. Banham, Sanjeev Gupta, David M. Rubin, Jessica A. Watkins, Dawn Y. Sumner, Kenneth S. Edgett, John P. Grotzinger, Kevin W. Lewis, Lauren A. Edgar, Kathryn M. Stack, Robert Barnes, James F. Bell, Mackenzie D. Day, Ryan C. Ewing, Mathieu G.A. Lapotre, Nathan T. Stein, Frances Rivera-Hernández, Ashwin R. Vasavada
Relaxed impact craters on Ganymede: Regional variation and high heat flows
Viscously relaxed craters provide a window into the thermal history of Ganymede, a satellite with copious geologic signs of past high heat flows. Here we present measurements of relaxed craters in four regions for which suitable imaging exists: near Anshar Sulcus, Tiamat Sulcus, northern Marius Regio, and Ganymede's south pole. We describe a technique to measure apparent depth, or depth of the cra
Authors
Kelsi N. Singer, Michael T. Bland, Paul M. Schenk, William B. McKinnon
Ceres internal structure from geophysical constraints
Thermal evolution modeling has yielded a variety of interior structures for Ceres, ranging from a modestly differentiated interior to more advanced evolution with a dry silicate core, a hydrated silicate mantle, and a volatile‐rich crust. Here we compute the mass and hydrostatic flattening from more than one hundred billion three‐layer density models for Ceres and describe the characteristics of t
Authors
S.J. King, J. C. Castillo-Rogez, M. J. Toplis, Michael T. Bland, C. A. Raymond, C. T. Russell
Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2015
This report continues the practice where the IAU Working Group on Cartographic Coordinates and Rotational Elements revises recommendations regarding those topics for the planets, satellites, minor planets, and comets approximately every three years. The Working Group has now become a “functional working group” of the IAU and its membership is open to anyone interested in participating. We describe
Authors
Brent Archinal, C. H. Acton, M. F. A’Hearn, A. Conrad, G. J. Consolmagno, T. Duxbury, D. Hestroffer, J. L. Hilton, Randolph L. Kirk, S. A. Klioner, D. McCarthy, K. Meech, J. Oberst, J. Ping, P. K. Seidelmann, D. J. Tholen, P. C. Thomas, I. P. Williams
AutoCNet: A Python library for sparse multi-image correspondence identification for planetary data
In this work we describe the AutoCNet library, written in Python, to support the application of Computer Vision techniques for n-image correspondence identication in remotely sensed planetary images and subsequent bundle adjustment. The library is designed to support exploratory data analysis, algorithm and processing pipeline development, and application at scale in High Performance Computing (HP
Authors
Jason R. Laura, Kelvin Rodriguez, Adam Paquette, Evin Dunn
Bright carbonate surfaces on Ceres as remnants of salt-rich water fountains
Vinalia and Cerealia Faculae are bright and salt-rich localized areas in Occator crater on Ceres. The predominance of the near-infrared signature of sodium carbonate on these surfaces suggests their original material was a brine. Here we analyze Dawn Framing Camera's images and characterize the surfaces as composed of a central structure, either a possible depression (Vinalia) or a central dome (C
Authors
Ottavian Ruesch, Lynnae Quick, Margaret Evelyn Landis, M.M. Sori, O. Čadek, P. Brož, K.A. Otto, Michael T. Bland, S. Byrne, J.C. Castillo-Rogez, H. Hiesinger, R. Jaumann, K. Krohn, L.A. McFadden, A. Nathues, A. Neesemann, F. Preusker, T. Roatsch, P.M. Schenk, J.E.C. Scully, M.V. Sykes, D.A. Williams, C.A. Raymond, C.T. Russell.
Exposed subsurface ice sheets in the Martian mid-latitudes
Thick deposits cover broad regions of the Martian mid-latitudes with a smooth mantle; erosion
in these regions creates scarps that expose the internal structure of the mantle.We
investigated eight of these locations and found that they expose deposits of water ice that
can be >100 meters thick, extending downward from depths as shallow as 1 to 2 meters below
the surface.The scarps are actively ret
Authors
Colin M. Dundas, Ali M Bramson, Lujendra Ojha, James J. Wray, Michael T. Mellon, Shane Byrne, Alfred S. McEwen, N. E. Putzig, Donna Viola, Sarah Sutton, E. Clark, J.W. Holt
Morphological indicators of a mascon beneath Ceres' largest crater, Kerwan
Gravity data of Ceres returned by the National Aeronautics and Space Administration's Dawn spacecraft is consistent with a lower density crust of variable thickness overlying a higher density mantle. Crustal thickness variations can affect the long‐term, postimpact modification of impact craters on Ceres. Here we show that the unusual morphology of the 280 km diameter crater Kerwan may result from
Authors
Michael T. Bland, Anton Ermakov, Carol A. Raymond, David A. Williams, Tim J. Bowling, F. Preusker, Ryan S. Park, Simone Marchi, Julie C. Castillo-Rogez, R.R. Fu, Christopher T. Russell
Image simulation and assessment of the colour and spatial capabilities of the Colour and Stereo Surface Imaging System (CaSSIS) on the ExoMars Trace Gas Orbiter
This study aims to assess the spatial and visible/near-infrared (VNIR) colour/spectral capabilities of the 4-band Colour and Stereo Surface Imaging System (CaSSIS) aboard the ExoMars 2016 Trace Grace Orbiter (TGO). The instrument response functions for the CaSSIS imager was used to resample spectral libraries, modelled spectra and to construct spectrally (i.e., in I/F space) and spatially consiste
Authors
Livio L. Tornabene, Frank P. Seelos, Antoine Pommerol, Nicolas Thomas, Christy M. Caudill, Patricio Becerra, John C. Bridges, Shane Byrne, Marco Cardinale, Matthew Chojnacki, Susan J. Conway, Gabriele Cremonese, Colin M. Dundas, M. R. El-Maarry, Jennifer Fernando, Candice J. Hansen, Kayle Hansen, Tanya N. Harrison, Rachel Henson, Lucia Marinangeli, Alfred S. McEwen, Maurizio Pajola, Sarah S. Sutton, James J. Wray
Planetary dune workshop expands to include subaqueous processes
Dune-like structures appear in the depths of Earth’s oceans, across its landscapes, and in the extremities of the solar system beyond. Dunes rise up under the thick dense atmosphere of Venus, and they have been found under the almost unimaginably ephemeral atmosphere of a comet.
Authors
Timothy N. Titus, Gerald Bryant, David M. Rubin
Revised recommended methods for analyzing crater size-frequency distributions
Impact crater populations crucially help us to understand solar system dynamics, planetary surface histories, and surface modification processes. A single previous effort to standardize how crater data are displayed in graphs, tables, and archives, was in a 1978 NASA report by the Crater Analysis Techniques Working Group, published in 1979 in Icarus. The report had a significant lasting effect, bu
Authors
Stuart J. Robbins, Jamie D. Riggs, Brian P. Weaver, Edward B. Bierhaus, Clark R. Chapman, Michelle R. Kirchoff, Kelsi N. Singer, Lisa Gaddis
Detecting geothermal anomalies and evaluating LST geothermal component by combining thermal remote sensing time series and land surface model data
This paper explores for the first time the possibilities to use two land surface temperature (LST) time series of different origins (geostationary Meteosat Second Generation satellite data and Noah land surface modelling, LSM), to detect geothermal anomalies and extract the geothermal component of LST, the LSTgt. We hypothesize that in geothermal areas the LSM time series will underestimate the LS
Authors
Mireia Romaguera, R. Greg Vaughan, J. Ettema, E. Izquierdo-Verdiguier, C. A. Hecker, F.D. van der Meer