Vol3 CDC 3D153 Ure3

28 Questions | Total Attempts: 159

SettingsSettingsSettings
CDC Quizzes & Trivia

This is to be used as a study aid for RF transmission CDC's 3D153.


Questions and Answers
  • 1. 
    (413) What comprises a telemetry data stream?
    • A. 

      Mission data and mission satellite health and status data.

    • B. 

      Command data and mission satellite health and status data.

    • C. 

      Mission data, satellite ephemeris table, and satellite status data

    • D. 

      Command data, satellite ephemeris table, and satellite status data.

  • 2. 
    (413) On a satellite, position and orientation control is especially critical for what type of antenna?
    • A. 

      Broadband.

    • B. 

      Wide angle

    • C. 

      High Frequency

    • D. 

      Highly directional

  • 3. 
    (414) The function of the command and control (C2) segment of the space systems is to?
    • A. 

      Provide downlink information and recover the payload and health and status data.

    • B. 

      Maintain the satellite health and status and recover the payload and health and status data.

    • C. 

      Provide downlink information and recover the payload and the area of coverage required by the program mission.

    • D. 

      Maintain the satellite health and status and recover the payload and the area of coverage required by the program mission.

  • 4. 
    (414) What type of command is sent to the satellite by the space systems mission control complex and contains embedded timing that specifies the time the satellite will execute the command?
    • A. 

      Real-time

    • B. 

      Time-delayed

    • C. 

      Timed program

    • D. 

      Stored program

  • 5. 
    (415) What is the purpose of the space system user segment?
    • A. 

      Receive, process, use, or distribute mission data as required by a program’s taskings.

    • B. 

      Receive, process, use, or distribute payload data and provide essential space support tasks as required by a program’s tasking

    • C. 

      Transmit, process, use, or distribute mission data as required by a program’s tasking

    • D. 

      Transmit, process, use, or distribute payload data and provide essential space support tasks as required by a program’s tasking

  • 6. 
    (415) The two major subdivisions of the Defense Meteorological Satellite Program user segment are?
    • A. 

      Air Force Weather Agency and the Fleet Numerical Meteorology Oceanography Center and tactical terminals.

    • B. 

      Air Force Weather Agency and Fleet Numerical Meteorology Oceanography Center only

    • C. 

      Air Force Weather Agency and National Oceanographic Atmospheric Administration

    • D. 

      Fleet Numerical Meteorology Oceanography Center and National Oceanographic Atmospheric Administration and tactical terminals

  • 7. 
    (415) Which early warning center receives Defense Support Program warning data from the 460th Space Wing units?
    • A. 

      Air Force Weather Agency.

    • B. 

      Mission Control Squadron.

    • C. 

      Mission Control Command.

    • D. 

      North American Aerospace Defense Command.

  • 8. 
    (415) For an operational mission, the purpose of the global positioning system user segment is to enable users to?
    • A. 

      Actively receive satellite broadcast position, velocity, and time data

    • B. 

      Actively transmit satellite broadcast position, velocity, and time data.

    • C. 

      Passively receive satellite broadcast position, velocity, and time data.

    • D. 

      Passively transmit satellite broadcast position, velocity, and time data.

  • 9. 
    (415) What system supports the National Command Authority and provides all-service (Army, Navy and Air Force) communication for interoperable command, control and communications (C3) at all levels of conflict?
    • A. 

      Defense Satellite Communications System

    • B. 

      Global Positioning System.

    • C. 

      Defense Support Program.

    • D. 

      Milstar

  • 10. 
    (416) What sequence of events you must follow when establishing a communication link with a satellite?
    • A. 

      Frequency acquisition, space acquisition, antenna pointing, and satellite tracking

    • B. 

      Satellite acquisition, satellite tracking, power correction, and antenna pointing.

    • C. 

      Orbit prediction, antenna pointing, satellite acquisition, and satellite tracking.

    • D. 

      Orbit prediction, space acquisition, and frequency acquisition.

  • 11. 
    (416) Telemetry refers to?
    • A. 

      A low power signal transmitted from the satellite and is separate from the communications components.

    • B. 

      A low power signal transmitted from the satellite and is part of the communications components.

    • C. 

      The data transmitted by the satellite concerning on-board status and is separate from the communications components.

    • D. 

      The data transmitted by the satellite concerning on-board status and is part of the communications components.

  • 12. 
    (416) Information contained in the ephemeris data pertain to the?
    • A. 

      Predicted satellite orbit.

    • B. 

      Predicted atmospheric conditions.

    • C. 

      Channels through a satellite that are available for use.

    • D. 

      Combinations of ground stations that can communicate with each other.

  • 13. 
    (416) Which tracking method requires no input from a satellite?
    • A. 

      Programmed track.

    • B. 

      Automatic track.

    • C. 

      Pseudoconscan.

    • D. 

      Step track.

  • 14. 
    (416) Automatic tracking systems are superior to programmed tracking systems because they?
    • A. 

      Use servomechanisms to control antenna movements.

    • B. 

      Track only signals received from the satellite.

    • C. 

      Track the actual position of the satellite.

    • D. 

      Use updated ephemeris data.

  • 15. 
    (416) What signals originating from the satellite do we use to acquire and track the satellite?
    • A. 

      Beacon.

    • B. 

      Ephemeris

    • C. 

      Telemetry.

    • D. 

      Communication.

  • 16. 
    (417) The intermediate frequencies/levels used by Defense Satellite Communications System (DSCS) earth terminals are 70 MHz at
    • A. 

      –10 dBm and 630 MHz @ –13 dBm

    • B. 

      –13 dBm and 630 MHz @ –10 dBm.

    • C. 

      -10 dBm and 700 MHz @ –13 dBm.

    • D. 

      –13 dBm and 700 MHz @ –10 dBm.

  • 17. 
    (417) How are the high power amplifiers (HPA) cooled in an AN/GSC–52 earth terminal?
    • A. 

      Air

    • B. 

      Cryogenic

    • C. 

      Liquid Nitrogen

    • D. 

      Ethanol/glycol solution.

  • 18. 
    (417) The downlink frequency range of the Defense Satellite Communications System (DSCS) is
    • A. 

      7.25 to 7.75 MHz.

    • B. 

      7.25 to 7.75 GHz.

    • C. 

      7.9 to 8.4 MHz.

    • D. 

      7.9 to 8.4 GHz.

  • 19. 
    (417) In the AN/GSC–52 earth terminal, the downconverter normally dedicated for tracking is downconverter?
    • A. 

      1 in Downconverter Rack 1.

    • B. 

      8 in Downconverter Rack 1.

    • C. 

      1 in Downconverter Rack 7.

    • D. 

      8 in Downconverter Rack 7.

  • 20. 
    What information is used for satellite tracking on an AN/GSC–52 earth terminal operating in the memory track mode?
    • A. 

      Beacon signal.

    • B. 

      Recorded data.

    • C. 

      Ephemerous data.

    • D. 

      Communications signal.

  • 21. 
    (417) Which of the following component is not used to control the AN/GSC–52 earth terminal?  
    • A. 

      Remote terminal processor (RTP).

    • B. 

      External control element.

    • C. 

      Internal control element.

    • D. 

      Terminal processor (TP).

  • 22. 
    (418) Which feedhorns are located in the AN/GSC–52 earth terminal feed assembly?
    • A. 

      Single tracking and communication feedhorn

    • B. 

      One tracking feedhorn and one communications feedhorn

    • C. 

      One tracking feedhorn and four communications feedhorns

    • D. 

      Four tracking feedhorns and one communication feedhorn.

  • 23. 
    (418) In the AN/GSC–52 earth terminal’s tracking system, what converts the azimuth/elevation (AZ/EL) velocity commands from the antenna control unit into drive power outputs to move the antenna?
    • A. 

      Scanner.

    • B. 

      Comparator.

    • C. 

      Servo amplifier.

    • D. 

      Optical converter.

  • 24. 
    (418) How are the high power amplifiers normally configured in the AN/GSC–52 earth terminal?
    • A. 

      One active online with three in standby mode.

    • B. 

      Two active online with two in standby mode.

    • C. 

      Three active online with one in standby mode.

    • D. 

      Four active online with none in standby mode.

  • 25. 
    (418) In the event of a downconverter failure in the AN/GSC–52 earth terminal, the downconverter?
    • A. 

      Switch assembly (under TS-A control) automatically places a spare online.

    • B. 

      Alarm monitor (under TS-A control) automatically places a spare online.

    • C. 

      Controller (under TS-A control) automatically places a spare online.

    • D. 

      Spare must be configured and placed online manually.

Back to Top Back to top