Archive for September, 2009
What is Inside a Typical Satellite?
Satellites come in all shapes and sizes and play a variety of roles. For example:
Weather satellites help meteorologists predict the weather or see what’s happening at the moment. Typical weather satellites include the TIROS, COSMOS and GOES satellites. The satellites generally contain cameras that can return photos of Earth’s weather, either from fixed geostationary positions [...]
How satellite works?
A satellite is basically any object that revolves around a planet in a circular or elliptical path. The moon is Earth’s original, natural satellite, and there are many manmade (artificial) satellites, usually closer to Earth.
The path a satellite follows is an orbit. In the orbit, the farthest point from Earth is the apogee, and the [...]
What is impedance?
Impedance is the total opposition to current flow. It includes both resistance and reactance (capacitive and inductive). Impedance varies with frequency, while plain resistance does not.
The symbol for impedance is usually Z and it may be represented by writing its magnitude and phase in the form
The term impedance was coined by Oliver Heaviside in [...]