Catherine M Wright, Virginia R Chomitz, Paula J Duquesnay, Sarah A Amin, Christina D Economos, Jennifer M Sacheck
The FLEX study school-based physical activity programs - measurement and evaluation of implementation
BMC public health
scheduled land august 2012 mars science laboratory msl mission initiated explore habitability mars includes modern environments well ancient environments recorded stratigraphic rock record preserved gale crater landing site curiosity rover designed lifetime least one mars year 23 months drive capability least 20 km curiositys science payload specifically assembled assess habitability includes gas chromatographmass spectrometer gas analyzer search organic carbon rocks regolith fines atmosphere sam instrument xray diffractometer determine mineralogical diversity chemin instrument focusable cameras image landscapes rockregolith textures natural color mahli mardi mastcam instruments alphaparticle xray spectrometer situ determination rock soil chemistry apxs instrument laserinduced breakdown spectrometer remotely sense chemical composition rocks minerals chemcam instrument active neutron spectrometer designed search water rocksregolith dan instrument weather station measure modernday environmental variables rems instrument sensor designed continuous monitoring background solar cosmic radiation rad instrument various payload elements work together detect study potential sampling targets remote situ measurements acquire samples rock soil atmosphere analyze onboard analytical instruments observe environment around rover 155km diameter gale crater chosen curiositys field site based several attributes interior mountain ancient flatlying strata extending almost 5 km elevation landing site lower hundred meters mountain show progression relative age claybearing sulfatebearing strata separated unconformity overlying likely anhydrous strata landing ellipse characterized mixture alluvial fan high thermal inertiahigh albedo stratified deposits number stratigraphicallygeomorphically distinct fluvial features samples crater wall rim rock recent currently active surface materials also may studied gale welldefined regional context strong evidence progression multiple potentially habitable environments environments represented stratigraphic record extraordinary extent insure preservation rich record environmental history early mars interior mountain gale crater informally designated mount sharp honor pioneering planetary scientist robert sharp major subsystems msl project consist single rover science payload multimission radioisotope thermoelectric generator earthmars cruise stage entry descent landing system launch vehicle mission operations ground data systems primary communication path downlink relay mars reconnaissance orbiter primary path uplink rover directfromearth secondary paths downlink directtoearth relay mars odyssey orbiter curiosity scaled version 6wheel drive 4wheel steering rocker bogie system mars exploration rovers mer spirit opportunity mars pathfinder sojourner like spirit opportunity curiosity offers three primary modes navigation blinddrive visual odometry visual odometry hazard avoidance creation terrain maps based hirise high resolution imaging science experiment remote sensing data used conduct simulated driving curiosity various modes allowed selection gale crater landing site requires climbing base mountain achieve primary science goals sample acquisition processing handling saspah subsystem responsible acquisition rock soil samples martian surface processing samples fine particles distributed analytical science instruments saspah subsystem also responsible placement two contact instruments apxs mahli rock soil targets saspah consists robotic arm turretmounted devices end arm include drill brush soil scoop sample processing device mechanical electrical interfaces two contact science instruments saspah also includes drill bit boxes organic check material observation tray mounted front rover inlet cover mechanisms placed sam chemin solid sample inlet tubes rover top deck