This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on “GPS – Operational Control Segment (OCS)”.
1. Which of the following is used for shaping the velocity of the satellite orbit?
a) User segment
b) Control segment
c) Ground segment
d) Space segment
View Answer
Explanation: The entire process of GPS has been categorized into user segment, control segment. These are allocated with a certain part of the entire work. Control segment helps me monitoring the shape and velocity of satellite orbits.
2. Which type of band can be used in the control segment?
a) N-band
b) M-band
c) K-band
d) S-band
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Explanation: For the proper functioning of the control segment, usage of certain bands like L-band and S-band is involved. L-band facilitates the path of GPS radio frequency and S-band facilitates the information transfer sessions.
3. Which among the following describes the usage of the S – band?
a) Merging wave length
b) Measuring wavelength
c) Duplex information transmission
d) Identifying signals
View Answer
Explanation: S-band usage plays a crucial role in the control segment as it helps in conducting duplex information transfer sessions with space vehicle and secure communication data links.
4. For coupling globally distributed ground assets which among the following can be used?
a) S-band
b) L-band
c) K-band
d) M-band
View Answer
Explanation: Secure communication data links are used in coupling globally distributed ground assets. These are produced from the S-bands, which are important in control segments.
5. Which of the following indicates the operations performed by the control segment?
a) Identifying bands
b) Merging signals
c) Controlling space vehicle
d) Determining wavelengths
View Answer
Explanation: Control segment can perform operations like controlling and maintaining status and configuration of the space vehicle, support system interfaces to associated services, manage and schedule the ground assets.
6. Which of the following is not included in the Operation Control segment?
a) Master control station
b) Alternate master control station
c) Commands
d) Program
View Answer
Explanation: An Operation Control Segment generally involves a master control station, an alternate master control station, commands and control antennas. Monitoring sites were also developed which can access the progress of work.
7. Which of the following can be used to generate navigational messages?
a) Control station
b) User segment
c) Space segment
d) Delivery segment
View Answer
Explanation: The generation of the navigational message can be done by using the master control station. The generated signals can be sent to the satellite. It can also provide command and control of the GPS constellation.
8. Ground antennas can be communicated using __________
a) N-band
b) K-band
c) S-band
d) M-band
View Answer
Explanation: The satellite to ground antenna communication can be established by using the s-band. The s-band can perform and provide the anomaly resolution with the early orbit support.
9. Satellite segment receives which of the following information?
a) Signals
b) Uplink control
c) Location
d) Gamma rays
View Answer
Explanation: Satellite segment receives the uplink control and position data from the ground segment. This can also create time related and satellite position messages, which can be transmitted by using frequencies.
10. Which of the following satellites can use OCS?
a) LISS-III
b) IRS-1B
c) IRS-1A
d) IIF
View Answer
Explanation: OCS can be used in the GPS mounted satellites like IIR-M and IIF which are currently in the orbit of rotation. These are having high accuracy GPS tracker which can function better than any other satellites.
Sanfoundry Global Education & Learning Series – Surveying.
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