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45問 • 1年前
  • Wilfred Feliciano
    • 通報

    問題一覧

  • 1

    What is the contributing source for Error Range of ±0.5 m?

    Tropospheric Delays

  • 2

    What is the contributing source for Error Range of ±5 m?

    Ionospheric delays

  • 3

    What is the term used for approximation distance between satellite and a GNSS receiver?

    Pseudorange

  • 4

    How much error range does Receiver * Noise have?

    + 0.3 m

  • 5

    What is the inclination angle of GLONASS satellite system?

    64.8 degrees

  • 6

    What is the meaning of NAVSTAR in GNSS satellite system?

    Navigation System using Time and Ranging

  • 7

    How many satellite and spares does * GPS satellite system have?

    24 Satellites + Spares

  • 8

    It is a term used for measuring the distance not angles.

    Triangulation

  • 9

    In what year does GPS was initially launched for military use, but opened up to civilian use?

    1983

  • 10

    GPS works through a technique called

    trilateration

  • 11

    At what speed does GPS satellite travels above the Earth?

    8,700 mph

  • 12

    In what year does GLONASS satellite system declared fully operational?

    1970

  • 13

    On what specific date that BeiDou Navigation Satellite System started providing global services?

    December 27, 2018

  • 14

    What is the meaning of MEO in GNSS?

    Medium Earth Orbit

  • 15

    What is the accuracy of NAVIC satellite system?

    3 m (public); 2 m (encrypted)

  • 16

    What is the term used for the point of the orbit closest to Earth?

    perigee

  • 17

    It is a way of radio signals are transmitted from one point to another inside the Earth's atmosphere or free space.

    propagation

  • 18

    How much is the altitude of GALILEO satellite system?

    23,616km

  • 19

    What satellite system provides global search and rescue function?

    Galileo

  • 20

    What is the meaning of GEO in GNSS?

    Geosynchronous Equatorial Orbit

  • 21

    Master Station adjust the satellite's orbit parameters and on-board high precision clocks when necessary to maintain accuracy.

    True

  • 22

    Ground antenna uploads any changes in satellite status back to the satellites.

    True

  • 23

    nanosecond is equal to 30 cm.

    True

  • 24

    microsecond is equal * to 10,000 nanoseconds.

    False

  • 25

    L1C "Fourth Civilian GPS Signal" has a bandwidth of 1575.45 MHz.

    False

  • 26

    Who develop echo sounder?

    Alexander Behm

  • 27

    What year Echo sounder develop?

    1913

  • 28

    Sonar originally an acronym for?

    Sound Navigation And Ranging

  • 29

    type of Echo sounder

    single beam echo-sounder multi-beam echo-sounder chart recording echo sounder electronic echo sounder

  • 30

    record depth on a specially treated paper held between 2 rollers moving at a uniform speed over a grounded plate.

    chart recording echo sounder

  • 31

    used to build up an image of a large area of the sea bed.

    multi-beam echo-sounder -

  • 32

    measuring the depth to the ocean floor directly underneath the ship.

    single beam echo-sounder

  • 33

    it uses digital methods in measuring time delay of return pulses and a digital analogue display

    electronic echo sounder

  • 34

    Consists of GNSS satellites, orbiting about 20,000 km above the earth. Each GNSS has its own constellation of satellites

    Space Segment

  • 35

    The control segment comprises of a ground-based network of master control stations, data uploading stations, and monitor stations.

    Control Segment

  • 36

    adjust the satellites' orbit parameters and on-board high-precision clocks when necessary to maintain

    Master control stations

  • 37

    monitor the satellites' signal and status, and relay this information to the master control station

    Monitor stations

  • 38

    uploads any change in satellite status back to the satellites

    Uploading stations/Ground Antennas

  • 39

    User segment consists of GNSS antennas and receivers used to determine information such as position, velocity, and time

    User Segment

  • 40

    Receivers need at least 4 satellites to obtain a position. If more are available, these additional observations can be used to improve the position solution GNSS signals are modulated by a unique pseudorandom digital sequence, or code. Each satellite uses a different pseudorandom code Receivers know the pseudorandom code for each satellite. This allows receivers to correlate (synchronize) with the GNSS signal to a particular satellite

    Reception

  • 41

    how many satellite to give us position in gps?

    need at least 4 satellites to obtain a position

  • 42

    To determine accurate positions, we need to know the range to the satellite. This is the direct path distance from the satellite to the user equipment The signal will "bend" when traveling through the earth's atmosphere. This "bending" increases the amount of time the signal takes to travel from the satellite to the receiver. Since the computed range contains errors and is not exactly equal to the actual range, we refer to it as a "pseudorange"

    Propagation

  • 43

    A DGPS for GPS can increase accuracy by about a thousandfold, from approximately?

    15 meters (49 ft) to 1-3 centimeters

  • 44

    Dgps

    differential global positioning system

  • 45

    The point in the moon's orbit where it is farthest from the earth is called

    apogee

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    問題一覧

  • 1

    What is the contributing source for Error Range of ±0.5 m?

    Tropospheric Delays

  • 2

    What is the contributing source for Error Range of ±5 m?

    Ionospheric delays

  • 3

    What is the term used for approximation distance between satellite and a GNSS receiver?

    Pseudorange

  • 4

    How much error range does Receiver * Noise have?

    + 0.3 m

  • 5

    What is the inclination angle of GLONASS satellite system?

    64.8 degrees

  • 6

    What is the meaning of NAVSTAR in GNSS satellite system?

    Navigation System using Time and Ranging

  • 7

    How many satellite and spares does * GPS satellite system have?

    24 Satellites + Spares

  • 8

    It is a term used for measuring the distance not angles.

    Triangulation

  • 9

    In what year does GPS was initially launched for military use, but opened up to civilian use?

    1983

  • 10

    GPS works through a technique called

    trilateration

  • 11

    At what speed does GPS satellite travels above the Earth?

    8,700 mph

  • 12

    In what year does GLONASS satellite system declared fully operational?

    1970

  • 13

    On what specific date that BeiDou Navigation Satellite System started providing global services?

    December 27, 2018

  • 14

    What is the meaning of MEO in GNSS?

    Medium Earth Orbit

  • 15

    What is the accuracy of NAVIC satellite system?

    3 m (public); 2 m (encrypted)

  • 16

    What is the term used for the point of the orbit closest to Earth?

    perigee

  • 17

    It is a way of radio signals are transmitted from one point to another inside the Earth's atmosphere or free space.

    propagation

  • 18

    How much is the altitude of GALILEO satellite system?

    23,616km

  • 19

    What satellite system provides global search and rescue function?

    Galileo

  • 20

    What is the meaning of GEO in GNSS?

    Geosynchronous Equatorial Orbit

  • 21

    Master Station adjust the satellite's orbit parameters and on-board high precision clocks when necessary to maintain accuracy.

    True

  • 22

    Ground antenna uploads any changes in satellite status back to the satellites.

    True

  • 23

    nanosecond is equal to 30 cm.

    True

  • 24

    microsecond is equal * to 10,000 nanoseconds.

    False

  • 25

    L1C "Fourth Civilian GPS Signal" has a bandwidth of 1575.45 MHz.

    False

  • 26

    Who develop echo sounder?

    Alexander Behm

  • 27

    What year Echo sounder develop?

    1913

  • 28

    Sonar originally an acronym for?

    Sound Navigation And Ranging

  • 29

    type of Echo sounder

    single beam echo-sounder multi-beam echo-sounder chart recording echo sounder electronic echo sounder

  • 30

    record depth on a specially treated paper held between 2 rollers moving at a uniform speed over a grounded plate.

    chart recording echo sounder

  • 31

    used to build up an image of a large area of the sea bed.

    multi-beam echo-sounder -

  • 32

    measuring the depth to the ocean floor directly underneath the ship.

    single beam echo-sounder

  • 33

    it uses digital methods in measuring time delay of return pulses and a digital analogue display

    electronic echo sounder

  • 34

    Consists of GNSS satellites, orbiting about 20,000 km above the earth. Each GNSS has its own constellation of satellites

    Space Segment

  • 35

    The control segment comprises of a ground-based network of master control stations, data uploading stations, and monitor stations.

    Control Segment

  • 36

    adjust the satellites' orbit parameters and on-board high-precision clocks when necessary to maintain

    Master control stations

  • 37

    monitor the satellites' signal and status, and relay this information to the master control station

    Monitor stations

  • 38

    uploads any change in satellite status back to the satellites

    Uploading stations/Ground Antennas

  • 39

    User segment consists of GNSS antennas and receivers used to determine information such as position, velocity, and time

    User Segment

  • 40

    Receivers need at least 4 satellites to obtain a position. If more are available, these additional observations can be used to improve the position solution GNSS signals are modulated by a unique pseudorandom digital sequence, or code. Each satellite uses a different pseudorandom code Receivers know the pseudorandom code for each satellite. This allows receivers to correlate (synchronize) with the GNSS signal to a particular satellite

    Reception

  • 41

    how many satellite to give us position in gps?

    need at least 4 satellites to obtain a position

  • 42

    To determine accurate positions, we need to know the range to the satellite. This is the direct path distance from the satellite to the user equipment The signal will "bend" when traveling through the earth's atmosphere. This "bending" increases the amount of time the signal takes to travel from the satellite to the receiver. Since the computed range contains errors and is not exactly equal to the actual range, we refer to it as a "pseudorange"

    Propagation

  • 43

    A DGPS for GPS can increase accuracy by about a thousandfold, from approximately?

    15 meters (49 ft) to 1-3 centimeters

  • 44

    Dgps

    differential global positioning system

  • 45

    The point in the moon's orbit where it is farthest from the earth is called

    apogee