They are corrected for barometric pressure. When flying above 18,000 feet in the U.S., airplanes express altitude in terms of Flight Levels , which have a standard altimeter setting of 29.92 ...

Solution 1 - GeoAlt To address these challenges, Green-GEAR’s Solution 1 - GeoAlt explores the introduction of geometric altimetry, i.e. satellite-navigation-based altitude measurements, to provide ...

AGENCY: Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT). ACTION: Statement of policy. ----- SUMMARY: This action clarifies FAA policy regarding the existing accuracy ...