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Introduction: Engineering constraints developed for the Mars Exploration Rovers (MER), their translation into ~185 potential landing sites and their down-selection to 6 high priority science sites have been described [1, 2]. These 6 sites (Meridiani-previously referred to as Hematite, Gusev, Isidis, Melas, Eos, and Athabasca) were evaluated in detail as to(More)
The Shallow Radar (SHARAD) on the Mars Reconnaissance Orbiter has imaged the internal stratigraphy of the north polar layered deposits of Mars. Radar reflections within the deposits reveal a laterally continuous deposition of layers, which typically consist of four packets of finely spaced reflectors separated by homogeneous interpacket regions of nearly(More)
Tropical stratospheric water vapor measured by the microwave limb sounder (M 1.S), " Geophys. Comparison of C1O measurements made by airborne and spaceborne microwave radiometers in the arctic winter stratosphere 1993, " Geophys. Correlated ollservations of HC1 and C1ONO2 from UARS and implications for stratospheric chlorine partitioning, " Geophys. Res.(More)
Trajectory calculations using horizontal winds from the United Kingdom Meteorological Office data assimilation system, and vertical velocities from a radiation calculation are used to simulate the three-dimensional motion of air through the stratospheric polar vortex, for several northern hemisphere (NH) and southern hemisphere (SH) winters since the launch(More)
The structure of the upper atmosphere of Mars (above ∼100 km) has been probed in situ mainly using spacecraft accelerometers during the aerobraking phases of 3 Mars or-biters. In a similar manner, the Mars Atmosphere and Volatile Evolution (MAVEN) Ac-celerometer Experiment (ACC) will also use atmospheric drag accelerations sensed by iner-tial measurement(More)
In the News of the Week article " Researchers fight plan to regulate mice, birds " (6 Oct., p. 23), David Malakoff portrays animal researchers as being " furious " with a decision by the U.S. Department of Agriculture to add mice, rats, and birds to the list of animals protected under the Animal Welfare Act (AWA). As seen in the accompanying table, however,(More)
Comprehensive analyses of remote sensing data during the three-year effort to select the Mars Exploration Rover landing sites at Gusev crater and at Meridiani Planum correctly predicted the atmospheric density profile during entry and descent and the safe and trafficable surfaces explored by the two rovers. The Gusev crater site was correctly predicted to(More)
The Mars Atmosphere and Volatile Evolution (MAVEN) mission, during the second of its Deep Dip campaigns, made comprehensive measurements of martian thermosphere and ionosphere composition, structure, and variability at altitudes down to ~130 kilometers in the subsolar region. This altitude range contains the diffusively separated upper atmosphere just above(More)
As the planet's principal cold traps, the martian polar regions have accumulated extensive mantles of ice and dust that cover individual areas of approximately 10(6) km2 and total as much as 3-4 km thick. From the scarcity of superposed craters on their surface, these layered deposits are thought to be comparatively young--preserving a record of the(More)
The Open University's repository of research publications and other research outputs Structure and dynamics of the Martian lower and middle atmosphere as observed by the Mars Climate Sounder: Seasonal variations in zonal mean temperature, dust and water ice aerosols Journal Article (2010). Structure and dynamics of the Martian lower and middle atmosphere as(More)