TELECOMMUNICATIONS SYSTEMS
COMMUNICATION WIRELESS COMPUTING DEVICES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
low
|
|
|
simulated
|
|
|
geosynchronous
|
|
|
fixed
|
Detailed explanation-1: -This makes satellites in GEO appear to be ‘stationary’ over a fixed position. In order to perfectly match Earth’s rotation, the speed of GEO satellites should be about 3 km per second at an altitude of 35 786 km.
Detailed explanation-2: -The aptly titled geosynchronous orbit is described in detail: “At an altitude of 124 miles (200 kilometers), the required orbital velocity is just over 17, 000 mph (about 27, 400 kph). To maintain an orbit that is 22, 223 miles (35, 786 km) above Earth, the satellite must orbit at a speed of about 7, 000 mph (11, 300 kph).
Detailed explanation-3: -Geosynchronous means that the satellite orbits with the same angular velocity as the Earth. A geostationary orbit is geosynchronous, but it is also required to have zero inclination angle and zero eccentricity. Geostationary satellites, therefore, remain essentially motionless above a point on the Equator.
Detailed explanation-4: -They constantly send pictures and information to receiving dishes on Earth. The GOES weather satellites are an example of this type of satellite. (Visit the GOES Weather Imagery Site). Most cable TV channel signals are also sent around the world with these types of satellites.