Orbits and swaths 2
Many satellites are designed to follow a north south orbit which, in conjunction with the earths rotation (west-east), allows them…
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Orbits and swaths 3
These are Near-polar orbits. Many of these satellites orbits are also Sun-synchronous such that they cover each area of the world …
Orbits and swaths
The path followed by a satellite is referred to as its orbit. Satellites which view the same portion of the earths surface at all …
Sensors and platforms 2
These sensors send out a signal and measure the amount reflected back. Active sensors are more controlled because they do not depe…
Sensors and platforms
A sensor is a device that measures and records electromagnetic energy. Sensors can be divided into two groups. Passive sensors dep…
Reflection and absorption
In remote sensing, a detector measures the electromagnetic (EM) radiation that is reflected back from the Earths surface materials…
Reflection and absorption
The occurrence of these surfaces in the natural world is very rare. In the visible region of the EM spectrum, the feature we descr…
Reflection and absorption
When radiation from the Sun reaches the surface of the Earth, some of the energy at specific wavelengths is absorbed and the rest …
spectral band
For example the wavelength range of 0.4m to 0.5m (m = micrometers or 10 -6 m) is one spectral band. Satellite sensors have been de…
spectral band
The major regions of interest in satellite sensing are visible light, reflected and emitted infrared, and the microwave regions. T…
