GPS Elevation

 

• Garmin outdoor products are designed for recreational navigation purposes, and are not intended for activities requiring precise measurements.
• Garmin navigators without barometric pressure sensors are capable of approximating elevation values using GNSS signals alone.
• GNSS elevation values can be accurate to +/-50 feet when calculated during optimum operating conditions.
• The accuracy of the elevation values displayed and/or recorded can and will be affected by multiple factors:
   
  • Satellite Visibility
     
    • More available satellites = more accurate elevation calculations.
    • Less available satellites = less accurate elevation calculations.
    • Tip: Enable multiple GNSS constellations to increase available satellites and improve elevation accuracy.
      
      
  • Signal Strength
     
    • Strong satellite signals = more accurate elevation calculations.
    • Weak satellite signals = less accurate elevation calculations.
    • Tip: A clear view of the sky is essential to obtaining the most accurate GNSS based elevation possible.
      
      
  • Constellation Geometry
     
    • Satellites closely gathered in the sky = less accurate elevation calculations.
    • Satellites broadly dispersed in the sky = more accurate elevation calculations.
    • Tip: Enable additional GNSS constellations to improve both satellite geometery and elevation accuracy.