GPS
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11) The GPS control segment consists of several government facilities that are responsible for operating the global positioning system. Which of the following procedures would not be executed by the control segment?
a) Continuous tracking of all GPS - Answer is C
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6) The carriers L1 and L2 are modulated by two PRNs, or pseudo-random noise codes. What are the names given to these codes?
a) Fo code and f1 code
b) P code and C/A code
c) IDOT code and IODE code
- Answer is B
- 13) The Joint Program Office has specified a three dimensional point positioning limit that should normally be available to P code users. Consider also the degradation of two dimensional civilian accuracy with selective availability. What is the maximum
- Answer is A
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5) What are the positioning signal frequencies used in GPS?
a) 150 MHz and 400MHz
b) 1832.12 MHz and 3236.92 MHz
c) 420.9 MHz and 1227.60 MHz
d) 1575.42 MHz and 1227.60 MHz
- Answer is D
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12) What is the meaning of selective availability in GPS?
a) The deliberate degradation of the GPS signal
b) The encryption of the P code transmissions
c) The licensing of all GPS receivers by the federal government
d) The shutdown of - Answer is A
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8) A navigation message is modulated onto both of the L1 and L2 carrier frequencies. What is the frequency of the navigation message, and what is its significance?
a) The frequency of the navigation message is 100 MHz, and the message contains - Answer is B
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15) What is the purpose of a ground plane on a GPS antenna?
a) The ground plane of a GPS antenna provides a convenient reference for its correct polarization
b) The ground plane of a GPS antenna improves its gain and coverage
c) The ground - Answer is D
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7) The PRN codes repeat themselves over specific intervals of time. What are the periods of those cycles, and what is their significance?
a) The P code has a 38 week period before it repeats itself, but each week of that cycle is assigned to a - Answer is A
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14) The remote monitoring stations transfer their data to the Master Control Stations, where computed satellite updates are generated and sent to the upload stations. Where is the Master Control Station located?
a) Hawaii
b) Ascension Island - Answer is D
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4) What is the mask angle in GPS, and what is its significance?
a) Reflected signals received by a GPS antenna are eliminated by a ground plane that defines the mask angle.
b) The mask angle is used in special circumstances to eliminate t - Answer is D
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10) Timeskeeping is critical to the operation of the GPS system. Which of the following statements best describes the devices used to maintain accurate times for positioning with GPS?
a) Each GPS block II satellite is equipped with two high precisio - Answer is B
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3) Which of the following orbital parameters best describes the final planned constellation of GPS satellites?
a) Six orbital planes inclined 55d with respect to the celestial equator.
b) Nearly circular orbits at 26,000 km.
c) Nearly circ - Answer is D
- 1. The TRANSIT Doppler satellite positioning system was released form commercial use in 19687 and has since been widely used. GPS technology represents an improvement over the earlier TRANSIT system in may respects. Which of the following statements corr
- Answer is D
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9) The block II GPS satellites are rather large vehicles, 845 kg in final orbit. The satellites are equipped to perform several general functions. Which of the following statements correctly characterizes some of those functions?
a) The satellites r - Answer is D
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2) What is the name given to the GPS satellites?
a) OSCAR
b) NOVA
c) NAVSTAR
d) ATLAS
- Answer is C