GNSS Flashcards
GNSS transmits signals in what frequency bracket?
UHF
GNSS stands for?
Global Navigation Satellite System
Does an aircraft’s GNSS system transmit?
No - it only receives
What is the only kind of transmission in GNSS?
Satellite transmission
How many different satellite signals are required for a GNSS position fix?
4
Radio waves travel at what speed?
Speed of light
Multiple satellite signals are needed for an accurate GNSS position fix largely due to?
Overcoming the issue of GNSS receivers not possessing accurate clocks
GNSS errors:
Atmospheric delays
Satellite clock errors
Orbit uncertainty
Multi-path errors
Receiver noise
A GNSS’ ‘Go-To’ track will always be what kind of track?
Great Circle
Why are GNSS tracks Great Circles?
GNSS Systems have a 3-dimensional model of Earth
GNSS directions will usually be referenced to?
Magnetic North
What is the generic name for a system that utilises ground-based position corrections transmitted to the GPS receiver from satellites?
Satellite Based Augmentation System (SBAS)
What does SBAS stand for?
Satellite Based Augmentation System
Can Dilution of Precision errors be corrected?
No
Can SBAS correct DOP errors in GNSS?
No
