Satellite Communication Questions

• In selecting a satellite system, the First determining factor is its
• The average noise temperature of Earth, as viewed from space, is __________ °K.
• The noise temperature of sky is about __________ °K.
• The 1150 kg geosynchronous satellite INSAT-IA parked 36000 km above India had greatly improved India's
• For satellite transmission, analog signals may be converted into digital form with the help of
• The lowest frequency used in satellite communications is __________ GHz.
• A typical error rate on satellite circuits is one bit error in
• Geosynchronous satellites are always launched in the equatorial plane because it is the only plane which provides
• A colour television signal having bandwidth of 4.6 MHz is digitised using 10 bits sample. The digital bit rate used for its transmission with PCM would be __________ kilobits/second.
• Assuming earth to be a sphere of radius 6400 km and height of a geosynchronous satellite above Earth as 36000 km, the velocity of a geosynchronous satellite is __________ km/hr.
• Which statement out of the following statement is wrong?
• A few minutes disturbance in space communications occurs twice a year during Sunblinding when __________ are in line.
• Regarding TASI which one of the following statements is wrong?
• Assuming a minimum angle of elevation of 5°, a geosynchronous satellite remains in line-of-sight for __________ percentage of Earth's surface.
• Presently, the worlds's largest and most advanced multi-purpose communication satellite is
• Mark out the WRONG statement. As compared to FDMA, the demand assignment system TDMA
• A satellite link uses different frequencies for receiving and transmitting in order to
• Most of the communication satellites are stationed to the West of their service areas in order to reduce their
• The expression for satellite link frequencies such as 4/6 GHz denotes that
• In satellite communication, highly directional antennas are used to