92.
Which one of the following statements is correct?
Digital modulation techniques are used in satellite communication systems since

93.
Match List-I with List-II and select the correct answer as per the options:
List-I List-II
a. The point farthest from earth 1. Retrograde orbit
b. Direct orbit 2. Mean anomaly
c. The inclination of this orbit always lies between 90º and 180º 3. Apogee
d. Average value of the angular position of the satellite with reference to the perigee 4. Prograde orbit

94.
Match List-I with List-II and select the correct answer as per the options:
List-I List-II
a. The path followed by a satellite around the primary will be an ellipse 1. True Anomaly
b. The angle from the perigee to the satellite position, measured at the earth’s centre 2. Keplerian element set
c. Earth-Orbiting artificial satellites are defined by six orbital elements 3. Perigee
d. The point of closest approach to earth 4. Kepler's first law

95.
An earth station at sea level communicates at an elevation angle of 35° with GEO satellite. The vertical height of the stratiform rain is 3 km. The physical path length L through the rain will be nearly

98.
A satellite that simply reflects back the signals from one region of the earth to the other region is known as

99.
In a geostationary satellite communication system, a message signal is transmitted from an earth station via an uplink to a satellite, amplified in a transponder on board the satellite and then transmitted via a downlink to another earth station. The most popular frequency band for satellite communication is

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