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  2. Altimeter - Wikipedia

    en.wikipedia.org/wiki/Altimeter

    An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level. [1] The measurement of altitude is called altimetry , which is related to the term bathymetry , the measurement of depth under water.

  3. Jason-1 - Wikipedia

    en.wikipedia.org/wiki/Jason-1

    Jason-1 was built by Thales Alenia Space using a Proteus platform, under a contract from CNES, as well as the main Jason-1 instrument, the Poseidon-2 altimeter (successor to the Poseidon altimeter on-board TOPEX/Poseidon). Jason-1 was designed to measure climate change through very precise millimeter-per-year measurements of global sea level ...

  4. Altimeter setting - Wikipedia

    en.wikipedia.org/wiki/Altimeter_setting

    It is designed to read zero at sea level in the vicinity of the aerodrome, unlike QNH which will not read precisely zero at sea-level. [2] Related to the altimeter settings are: TA [3] - Transition Altitude - altitude at which the pilot changes the aircraft's altimeter setting (usually from QNH) to standard pressure (1013.25 hPa)

  5. Pressure altimeter - Wikipedia

    en.wikipedia.org/wiki/Pressure_altimeter

    Air pressure decreases with an increase of altitude—approximately 100 hectopascals per 800 meters or one inch of mercury per 1000 feet or 1 hectopascals per 30 feet near sea level. The aneroid altimeter is calibrated to show the pressure directly as an altitude above mean sea level, in accordance with a mathematical model atmosphere defined ...

  6. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    altimeter: altitude ammeter: electric current anemometer: windspeed astrolabe: latitude and altitude of celestial bodies audiometer: hearing barkometer: tanning liquors used in tanning leather barometer: air pressure bettsometer: integrity of fabric coverings on aircraft bevameter: mechanical properties of soil bolometer: electromagnetic ...

  7. Altitude - Wikipedia

    en.wikipedia.org/wiki/Altitude

    Pressure altitude divided by 100 feet (30 m) is the flight level, and is used above the transition altitude (18,000 feet (5,500 m) in the US, but may be as low as 3,000 feet (910 m) in other jurisdictions). So when the altimeter reads the country-specific flight level on the standard pressure setting the aircraft is said to be at "Flight level ...

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  9. OSTM/Jason-2 - Wikipedia

    en.wikipedia.org/wiki/OSTM/Jason-2

    It was placed in a 1,336 km (830 mi) circular, non-Sun-synchronous orbit at an inclination of 66.0° to Earth's equator, allowing it to monitor 95% of Earth's ice-free ocean every 10 days. Jason-1 was moved to the opposite side of Earth from Jason-2 and now flies over the same region of the ocean that Jason-2 flew over five days earlier. [6]

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