GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) EXAM QUESTIONS WITH VERIFIED ANSWERS. A+ GRADE 2025/2026.

GLOBAL NAVIGATION SATELLITE
SYSTEM (GNSS) EXAM QUESTIONS
WITH VERIFIED ANSWERS. A+ GRADE
2025/2026.




Global Navigation Satellite System (GNSS) - ANS satellite-based tech that can provide help in
field measurement



what kind of location measurements does GNSS use? - ANS field measurements and remote
data collection



NAVSTAR GPS - ANS - the United States Global Positioning System
- GPS III (2010) improves accuracy, includes anti-slamming capability



GLONASS - ANS - Russia's GNSS
- completed in 1995
- fell into disrepair and in restorations



GALILEO - ANS - European Union's GNSS
- in development with expected completion 2014-2020



BEIDOU (Compass) - ANS - China's GNSS

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, - 1st generation with 3 satellites (2000)
- 2nd generation with 35 satellites (2011)
- global service expected 2020



GNSS components consist of what 3 segments? - ANS satellite segment
user segment
control segment



satellite segment - ANS - 31 GPS satellites that orbit at ~20,000 km (2011)
- satellites complete 2 full orbits every day
- each satellite knows its location and has its own atomic clock
- radio signals broadcast by each satellite



user segment - ANS - mobile devices and recreational GPS
- combines GPS, cellular data, and mapping
- 3-6 m error
- GIS grade and Survey Grade devices



GIS - Grade device is designed for - ANS mapping and GIS with a 1-3 m error with differential
correction



Survey - Grade is programmed with - ANS real-time differential correction and
interferometry with a sub-mm error



Control Segment - ANS - has 5 tracking stations with master control in Colorado
- used to observe, maintain, and manage
- correct and update data sent to satellite


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