polar-orbiting satellite

Satellite that travels in a polar orbit around the globe 14 times per day; this allows it to cover the entire surface of the globe, due to the Earth’s rotation.

solar array drive

solar array

Power supply device that converts solar energy into immediately usable electrical energy.

radiometer

Instrument designed to measure electromagnetic radiation energy at a given frequency.

thermal louver

Adjustable mechanical component designed to modify thermal flux.

reaction engine assembly

Micromotor that makes it possible to direct a satellite to the desired position.

ultraviolet spectrometer

Instrument that monitors ozone levels in the Earth’s atmosphere.

S-band antenna

Antenna that enables a satellite to transmit the data it collects to the terrestrial station.

Earth radiation sensor

Radiometer that measures solar radiation and reflection in the Earth’s atmosphere.

Earth radiation scanner

Radiometer that analyzes a region of the globe by means of repeated scans.

microwave scanner

Instrument that produces an image of an observed area even in cloudy conditions since microwave frequencies pass through clouds.

antenna

Device that emits and receives radio waves.

Earth sensor

Instrument that locates the Earth’s horizon so that the antenna can be positioned correctly.

infrared sounder

Instrument that measures thermal energy in clouds and on the Earth’s surface with a view to capturing nighttime images of weather systems and cloud cover.

Sun sensor

Instrument that positions the solar panels in the direction of the Sun to capture its energy.

instrument platform

search-and-rescue antennas

Device that picks up distress signals emitted by ships or aircraft and makes it possible to determine their location.

battery modules