Satellite Communications MCQ
151. A common up-converter and down-converter IF in satellite communications is
- A. 36 MHz
- B. 40 MHz
- C. 70 MHz
- D. 500 MHz
152. It is the angle between the earth’s equatorial plane and the orbital plane of the satellite measured counterclockwise.
- A. Angle of elevation
- B. Angle of azimuth
- C. Angle of inclination
- D. Angle of tetrahedron
153. Which of the following types of HPA is not used in earth stations?
- A. TWT
- B. Klystron
- C. Transistors
- D. Magnetron
154. Galileo satellite’s mass is ____.
- A. 880 kg
- B. 675 kg
- C. 900 kg
- D. 540 kg
155. The point where a polar or inclined orbit crosses the equatorial plane traveling from north to south
- A. Ascending node
- B. Line of nodes
- C. Descending node
- D. Diagonal nodes
156. The receive GCE system in an earth station performs what function/s
- A. Modulation and multiplexing
- B. Up conversion
- C. Demodulation and demultiplexing
- D. Down conversion
157. The term generally associated with the table showing the position of a heavenly body on the number of dates in a regular sequence.
- A. Astronomical almanac
- B. Smith
- C. Ephemeris
- D. Space reporting
158. The point where a polar or inclined orbit crosses the equatorial plane traveling from south to north.
- A. Ascending node
- B. Descending node
- C. Diagonal node
- D. Inclined node
159. The line joining the ascending and descending node is called ____.
- A. Line of apsides
- B. Line of nodes
- C. Line of shoot
- D. Any of these
160. When the satellite rotates in an orbit directly above the equator, usually in circular pattern. This type of orbit is called ____.
- A. Polar orbit
- B. Synchronous orbit
- C. Geosynchronous satellite
- D. Equatorial orbit
161. The Navstar GPS satellite system was declared fully operational as of ____.
- A. April 17, 1995
- B. April 24, 1995
- C. April 27, 1995
- D. April 10, 1995
162. The HPAs in most satellites are
- A. TWTs
- B. Vacuum tubes
- C. Klystrons
- D. Magnetrons
163. The physical location of a satellite is determined by its
- A. Distance from the earth
- B. Latitude and longitude
- C. Reference to the stars
- D. Position relative to the sun
164. When the satellite rotates in a path that takes it over the north and south poles in an orbit perpendicular to the equatorial plane. This type of orbit is called ____.
- A. Inclined orbit
- B. Polar orbit
- C. Geosynchronous orbit
- D. Diagonal orbit
165. The azimuth angles and the angle of elevation is collectively known as ____.
- A. Antennas look angles
- B. Antennas see angles
- C. Antennas keep angles
- D. Antennas satellite angles
166. The point on the surface of the Earth directly below the satellite.
- A. Satellite point
- B. Latitude
- C. Longitude
- D. Subsatellite point
167. It is the vertical angle formed between the direction of travel of an electromagnetic wave radiated from an earth station antenna pointing directly toward a satellite and the horizontal plane.
- A. Angle of depression
- B. Angle of inclination
- C. Angle of elevation
- D. Angle of azimuth
168. The unique number used to encrypt the signal from that of the GPS satellite.
- A. SV
- B. UV
- C. PRN
- D. ESN
169. The minimum acceptable angle of elevation
- A. 6 degrees
- B. 4 degrees
- C. 5 degrees
- D. 7 degrees
170. It is the horizontal angular distance from a reference direction either the southern or northern most point of the horizon.
- A. Angle of elevation
- B. Latitude
- C. Longitude
- D. Azimuth
171. It is defined as the horizontal pointing angle of an earth station antenna.
- A. Angle of inclination
- B. Azimuth angle
- C. Latitude
- D. Longitude
172. Determines the farthest satellite away that can be seen looking east or west of the earth station’s longitude
- A. Radio horizon
- B. Optical horizon
- C. Terrestrial limits
- D. Limits of visibility
173. The spatial separation of a satellite is between ____.
- A. 3 to 6 degrees
- B. 1 to 2 degrees
- C. 5 to 8 degrees
- D. 8 to 16 degrees
174. The geographical representation of a satellite antenna’s radiation pattern is called a ____.
- A. Field intensity
- B. Footprint
- C. Radiation propagation
- D. Polarization
175. The GPS satellite identification which is assigned according to the order of the vehicle’s launch.
- A. SV
- B. EV
- C. PRN
- D. ESN
176. The smallest beam of a satellite that concentrates their power to very small geographical areas.
- A. Hemispherical beam
- B. Global beam
- C. Spot beam
- D. Any of these
177. Satellite’s radiation pattern that typically target up to 20% of the Earth’s surface.
- A. Hemispherical beam
- B. Global beam
- C. Spot beam
- D. Any of these
178. The key electronic component in a communications satellite is the
- A. Telemetry
- B. Command and Control system
- C. On-board computer
- D. Transponder
179. The radiation pattern that has a satellite’s antenna beamwidth of 17 degrees and are capable of covering approximately 42% of the earth’s surface.
- A. Hemispherical beam
- B. Earth beam
- C. Spot beam
- D. Any of these
180. The first active satellite
- A. Moon
- B. Sputnik I
- C. Score
- D. Echo
181. Sputnik I transmitted telemetry information for
- A. 1 week
- B. 21 days
- C. 15 days
- D. 30 days
182. The US counterpart of Sputnik I
- A. Syncom
- B. Telstar
- C. Echo
- D. Explorer I
183. Explorer I lasted for ____.
- A. 5 months
- B. 6 months
- C. 12 months
- D. 2 months
184. Navstar GPS satellite grouping that can operate continuously for 180 days between uploads from the ground.
- A. Block III
- B. Block IIa
- C. Block II
- D. Block IIR
185. It was the first artificial satellite used for relaying terrestrial communications
- A. Score
- B. Explorer I
- C. Sputnik I
- D. Syncom I
186. Which of the following satellite rebroadcast President Eisenhower’s 1958 Christmas message?
- A. Telstar I
- B. Telstar II
- C. Echo
- D. Score
187. The satellite or space segment of Navstar GPS is consist of ____ operational satellites.
- A. 30
- B. 24
- C. 14
- D. 20
188. It was the first satellite to accomplish transatlantic transmission.
- A. Courier
- B. Echo
- C. Telstar
- D. Syncom
189. It is the first transponder-type satellite
- A. Telstar I
- B. Sputnik I
- C. Syncom
- D. Courier
190. The first active satellite to simultaneously receive and transmit radio signals.
- A. Telstar I
- B. Telstar II
- C. Intelsat
- D. Syncom
191. The satellite communications channel in a transponder are defined by the
- A. LNA
- B. Bandpass filter
- C. Mixer
- D. Input signals
192. The satellite that was damaged by radiation from a newly discovered Van Allen Belts and consequently lasted for two weeks.
- A. Telstar I
- B. Telstar II
- C. Intelsat
- D. Syncom
193. As the height of a satellite orbit gets lower, the speed of the satellite
- A. Increases
- B. Decreases
- C. Remains the same
- D. None of the above
194. The satellite that was lost in space in its first attempt to place it in a geosynchronous orbit.
- A. Syncom I
- B. Telstar I
- C. Telstar II
- D. Courier
195. Intelsat I which was the first commercial telecommunications satellite is called ____.
- A. Domsat
- B. Molniya
- C. Early bird
- D. Courier
196. Block II Navstar GPS satellites can operate for approximately ____ between the receiving updates and corrections from the control segment of the system.
- A. 5.5 days
- B. 3.5 days
- C. 6 days
- D. 7 days
197. The angle of inclination of a satellite in polar orbit is nearly ____.
- A. 45 degrees
- B. 90 degrees
- C. 30 degrees
- D. 60 degrees
198. It is the time it takes earth to rotate back to the same constellation
- A. Revolution
- B. Rotation
- C. Sidereal period
- D. Year
199. Satellites with orbital pattern like Molniya are sometimes classified as
- A. LEO
- B. MEO
- C. GEO
- D. HEO
200. The process of maneuvering a satellite within a preassigned window is called
- A. Satellite keeping
- B. Station controlling
- C. Station keeping
- D. Satellite controlling
Satellite Communications MCQ- Answers
151. 70 MHz
152. Angle of inclination
153. Magnetron
154. 675 kg
155. Descending node
156. Demodulation and demultiplexing
157. Ephemeris
158. Ascending node
159. Line of nodes
160. Equatorial orbit
161. April 27, 1995
162. TWTs
163. Latitude and longitude
164. Polar orbit
165. Antennas look angles
166. Subsatellite point
167. Angle of elevation
168. PRN
169. 5 degrees
170. Azimuth
171. Azimuth angle
172. Limits of visibility
173. 3 to 6 degrees
174.Footprint
175. SV
176. Spot beam
177. Hemispherical beam
178. Transponder
179. Earth beam
180. Sputnik I
181. 21 days
182. Explorer I
183. 5 months
184. Block IIa
185. Score
186. Score
187. 24
188. Echo
189. Courier
190. Telstar I
191. Bandpass filter
192. Telstar I
193. Increases
194. Syncom I
195. Early bird
196. 3.5 days
197. 90 degrees
198. Sidereal period
199. HEO
200. Station keeping
