Questions tagged [sbas]

For questions about Satellite Based Augmentation Systems (SBAS). Examples include WAAS in North America (use [waas] tag for questions specific to WAAS) and EGNOS in Europe.

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5 votes
2 answers
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What is the difference between SBAS and SBAS PA mode on my FMS?

We have a Collins FMS, and in the GNSS control page it tells you what mode it is operating in. In the instance that I checked it, it said "SBAS PA". The flight manual said that it can ...
Name's user avatar
  • 886
1 vote
1 answer
294 views

Why are SBAS-equipped planes exempt from the preflight prediction check?

My question stems from this other question: Why is training regarding the loss of RAIM given so much more emphasis than training regarding the loss of SBAS? Two answers say losing RAIM puts a question ...
user avatar
4 votes
2 answers
541 views

Why does GBAS broadcast Final Approach Segment data when SBAS does not?

Ground Based Augmentation Systems broadcast message four, the Final Approach Segment, along with corrections for GNS signals in messages one and two. Since the FAS is essentially a semi-static ...
Pilothead's user avatar
  • 20k
1 vote
0 answers
119 views

According to ICAO, which rules are applicable to SBAS Non-Precision Approach Procedures?

I am studying the Satellite Based Augmentation System (SBAS) from PANS OPS manual 8168, Volume II, sixth edition, and I have a problem concerning the criteria of SBAS-NPA. In Part III, Section 3, ...
Vector Zita's user avatar
  • 1,853
1 vote
1 answer
165 views

Does transition to SBAS or GBAS navigation require alignment of the intermediate segment with final segment?

I am studying how the Satellite Based Augmentation System (SBAS) or the Ground Based Augmentation System (GBAS) affect the Instrument Approach Procedures, and I noticed that in ICAO's Aircraft ...
Vector Zita's user avatar
  • 1,853