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Results tagged with gnss
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user 3677
GNSS is a global satellite navigation system. GPS is the US GNSS.
5
votes
What is the difference between GPS, GNSS and RNAV?
GNSS stands for Global Navigation Satellite System, which encompasses GPS as well as the Russian built and operated GLONASS (Global'naya Navigatsionnaya Sputnikovaya Sistema/"Global Navigation Satellite …
- 102k
1
vote
Are there (ideas for) GNSS based attitude indicators?
The FAA seems to allow GNSS signals to supplement AHARS data I cant find a copy of TSO-C4c which outlines the certification limits for pitch and bank instruments but may shed more light on the topic. …
- 102k
7
votes
Accepted
What did Fiji have to do when it incorporated GPS into its aviation system?
This early ICAO document covering the introduction of GNSS (GPS) should cover the whole topic quite well. …
- 102k
4
votes
Accepted
Will the IFR Grade GPS be an requirement in the future?
They are well on their way but it will never be a direct requirement per say. The regulations state
(2) Two-way radio communication and navigation equipment suitable for
the route to be flown.
…
- 102k
1
vote
Accepted
What is the meaning of GPS IAP RNP that appears in Notes?
The AC covering RNP APCH can be found here. Under RNP APCH Operations it lists:
6.3 RNP En Route, RNP Terminal, and RNP APCH Operations:
The pilot is not required to monitor ground-based NAVAIDs use …
- 102k
30
votes
Accepted
What will happen if satellite navigation fails?
It only takes 3 satellites for a GPS fix (4 if you want altitude). There are 31 operational satellites currently in orbit and at any given time you can most likely receive a signal from half a dozen o …
- 102k
1
vote
Accepted
Can a GPS waypoint be used when filing a VFR flight plan?
The AIM specifies how flight plans should be filled out, block 8 contains the route of flight:
Block 8. Define the route of flight by using NAVAID identifier codes and airways
It is possi …
- 102k
3
votes
Accepted
Does EASA allow using a portable GPS for RNAV capability?
The answer, broadly is no, handheld GPS units can not be used for IFR RNAV routes (or approaches for that matter). To know if a specific GPS unit is legal for IFR navigation you need to check up on a …
- 102k
7
votes
Accepted
Why would a Mode-C transponder report a different altitude than an altimeter/GPS?
It sounds like there was an issue with your altitude encoder
The transponder depends on an external altitude encoder to provide the
digitized pressure altitude that the transponder needs for it …
- 102k