- What is the difference between GPS, GNSS and RNAV?
GNSS is an umbrella term that encompasses GPS as well as other nations' satellite systems that achieve essentially the same capability RNAV is the aircraft capability that allows you to navigate from point to point, defined by Latitude Longitude and independent of any ground-based system
- gnss - What are satellite time, GPS time, and UTC time? - Aviation . . .
What is the difference between Satellite time, GPS time and UTC time? How are these calculated from one another?
- gnss - How is quantum technology thought to provide a potential . . .
Regarding GNSS navigation vulnerability, the targeted system is an improved inertial navigation system, more precise than GNSS, not relying on radio signals, with a cost and a size comparable to a GNSS receiver Such system is not currently operational Why such systems are required for the future, and how they work is detailed below
- Why RNAV SIDs and STARs are RNAV 1 instead of RNP 1?
First of all, an RNP 1 procedure requires a GPS GNSS And as you have said, it requires an inbuilt navigation monitoring and an alerting system On the other hand, an RNAV 1 procedure does not In RNAV 1 you can get navigational aid from the IRS VOR DME or IRS DME DME The SIDs and STARs can either be RNAV 1 or RNP 1 RNAV 1 is the system introduced at the start of performance based
- gnss - Why dont planes (mostly airliners) primarily use GPS for . . .
16 While the other answers are correct about why GPS (or similar GNSS, such as GLONASS, etc ) aren't used exclusively for aircraft navigation, I would say that, these days, the premise of this question is no longer correct and GPS is the primary means of navigation for aircraft
- gnss - Difference between accuracy, integrity, availability, continuity . . .
My understanding is that accuracy is how close my estimated position is to my actual position at a certain point in time I don't really understand how integrity is different from accuracy Continu
- gnss - What are the lateral sensitivities of GPS approaches? - Aviation . . .
What are the lateral sensitivities of each of the WAAS and LNAV approach? Is the lateral sensitivity of WAAS the same as that of the localizer, which is 3 to 6 degrees? What about the LNAV approach?
- What is the geoid undulation used for in aviation?
The way the altitude is computed is: GNSS determines a 3D position from satellites, expressed as x,y,z in a Cartesian Earth centered frame The position is converted into latitude, longitude and h using the ellipsoid model and a polar frame Optionally H is computed from h using the geoid model Wording used in aviation for GNSS altitudes
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