To enhance its navigation support, the PS535F has a built-in altimeter and an E-compass, allowing pinpoint positioning of longitude, latitude, and altitude, ...
Altimeter
An instrument for determining elevation, especially an aneroid barometer used in aircraft that senses pressure changes accompanying changes in altitude.
altimeter
an aneroid barometer that is used for the measurement of approximate elevations or approximate differences of elevation
altitude ...
Laser altimeters are now being flown on space vehicles. The Orbital Profiling Laser Altimeter is a pulsed, time-of-flight optical (1.024 µm) sensor that sends 10 pulses per second (pps) in a narrow beam (footprint 30-150 m diameter; ...
radar altimeter
An instrument that determines elevation, usually from mean sea level, by measuring the amount of time an electromagnetic pulse takes to travel from an aircraft to the ground and back again.
Geoscience Laser Altimeter System; Geologisches Landesamt des Saarlandes
GLAS-H
Geologisches Landesamt Schleswig-Holstein ...
Mars Orbiter Laser Altimetery (MOLA) is located at:
Mars Viking data may be obtained at (thanks to a pointer from Tony Standley): With lots of great information at: ...
Laser and radar altimeters on satellites have provided a wide range of data. By measuring the bulges of water caused by gravity, they map features on the seafloor to a resolution of a mile or so.
altimeter Instrument for measuring altitudes or elevations with respect to a reference level, usually mean sea level. The most common type is an aneroid barometer.
was not possible, the relationship between barometric pressure and height was used to calculate heights above sea level. This is a complex process if the best possible result is wanted, but it is the same principle used in an aircraft's altimeter.
It does give a good approximation though and, by looking at your surroundings, you should be able to figure out which hill on which side of the valley you are on. If you have an altimeter with you, ...
 See also: Surface, Cover, Information, Map, Resolution
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