[1][2] REMS measures humidity, pressure, temperature, wind speeds, and ultraviolet radiation on Mars.

[4][6] All sensors are located around three elements: two booms attached to the rover Remote Sensing Mast (RSM), the Ultraviolet Sensor (UVS) assembly located on the rover top deck, and the Instrument Control Unit (ICU) inside the rover.

Goals include understanding Martian general circulation, microscale weather systems, local hydrological cycle, destructive potential of UV radiation, and subsurface habitability based on ground-atmosphere interaction.

[7] Reports are posted on the Center for Astrobiology website and Twitter daily.

[12] The air temperature, wind speed and direction sensor for InSight Mars lander (planned for 2018 launch) is based on REMS, also contributed by Spain.