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satellite remote sensing click to hear : satellite remote sensing

Observation of the Earth’s surface and atmosphere by a satellite equipped with a sensor.
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See satellite remote sensing in : french | spanish
active sensor data recording passive sensor energy source natural radiation target data processing target data reception data recording reflection artificial radiation data transmission

active sensor click to hear : active sensor

Instrument that itself emits the energy required to illuminate the target and receives the waves it reflects.

data recording click to hear : data recording

If the satellite in unable to communicate with the terrestrial station, data is registered onboard and transmitted later.

passive sensor click to hear : passive sensor

Instrument that receives the waves produced when the target reflects the Sun’s natural rays.

energy source click to hear : energy source

At the origin of the remote sensing process is an energy source, for example the Sun, used to illuminate the target.

natural radiation click to hear : natural radiation

When the sky is clear, the satellite captures the reflection of the Sun’s rays from the Earth’s surface.

target click to hear : target

Surface or object that reflects the Sun’s rays.

data processing click to hear : data processing

Raw data is interpreted and analyzed to extract information about the target.

target click to hear : target

Surface or object that reflects the Sun’s rays.

data reception click to hear : data reception

Raw data reaches the terrestrial station in digital form.

data recording click to hear : data recording

If the satellite in unable to communicate with the terrestrial station, data is registered onboard and transmitted later.

reflection click to hear : reflection

Phenomenon by which natural or artificial waves bounce off the target and toward the satellite.

artificial radiation click to hear : artificial radiation

When atmospheric conditions hide the Sun’s rays, the active sensor itself emits radiation waves.

data transmission click to hear : data transmission

The sensor transmits raw data, if possible immediately, to a terrestrial station for processing.