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Instrument used to determine the height of an object above a certain point
instrument is a type of altimeter called a pressure altimeter or barometric altimeter. A pressure altimeter is the altimeter found in most aircraft, and
Altimeter
American investment firm
Altimeter Capital is an American investment firm based in Boston, Massachusetts and Menlo Park, California. The firm focuses on technology investments
Altimeter_Capital
Setting for pressure altimeters
Altimeter setting is the value of the atmospheric pressure used to adjust the scale of a pressure altimeter so that it indicates the accurate height of
Altimeter_setting
Measures an aircraft's height above the terrain
A radar altimeter (RA), also called a radio altimeter (RALT), electronic altimeter, reflection altimeter, or low-range radio altimeter (LRRA), measures
Radar_altimeter
American investor and hedge fund manager (born 1971)
fund manager, and podcaster. He is the founder, chairman, and CEO of Altimeter Capital. Gerstner appeared on the 2022 Forbes Midas List after his firm's
Brad_Gerstner
Barometric tool
instrument is a type of altimeter called a pressure altimeter or barometric altimeter. A pressure altimeter is the altimeter found in most aircraft, and
Pressure_altimeter
Aircraft instrument that gives information during flight
horizon. Visual flight rules (VFR) require an airspeed indicator, an altimeter, and a compass or other suitable magnetic direction indicator. Instrument
Flight_instruments
2009 aviation accident in the Netherlands
aircraft's automated reaction, which was triggered by a faulty radio altimeter. This caused the autothrottle to decrease the engine power to idle during
Turkish_Airlines_Flight_1951
Measure in aviation
flight level (FL) is an aircraft's altitude as determined by a pressure altimeter using the International Standard Atmosphere. A flight level is a surface
Flight_level
Scientific instrument used to measure atmospheric pressure
altimeters (the most basic and common type of altimeter) are essentially the same instrument, but used for different purposes. A pressure altimeter is
Barometer
Method of spatial measurement using laser
Laser altimeters produced global elevation models of Mars, the Moon (Lunar Orbiter Laser Altimeter (LOLA)), and Mercury (Mercury Laser Altimeter (MLA)
Lidar
Continuously computed dead reckoning
references. Often the inertial sensors are supplemented by a barometric altimeter and sometimes by magnetic sensors (magnetometers) and/or speed measuring
Inertial_navigation_system
Altitude at which atmosphere has a specified pressure
altitude obtained when an altimeter is set to an agreed baseline pressure under certain circumstances in which the aircraft’s altimeter would be unable to give
Pressure_altitude
NASA robotic spacecraft orbiting the moon
near-surface water ice deposits. Lunar Orbiter Laser Altimeter (LOLA) The Lunar Orbiter Laser Altimeter investigation provides a precise global lunar topographic
Lunar_Reconnaissance_Orbiter
NASA satellite to observe ice sheets, clouds, and land (2003–2010)
tree density. The sole instrument on ICESat was the Geoscience Laser Altimeter System (GLAS), a space-based lidar. GLAS combined a precision surface
ICESat
1959 aviation accident
the aircraft's instruments, and right up to the moment of impact, the altimeter had been showing that they were flying a safe distance above the water
American_Airlines_Flight_320
American mathematician (1930–2026)
that used punched cards. Subsequently, West began to analyze satellite altimeter data from NASA's Geodetic Earth Orbiting program, to create models of
Gladys_West
Instrument on the Mars Global Surveyor spacecraft
The Mars Orbiter Laser Altimeter (MOLA) was one of five instruments on the Mars Global Surveyor (MGS) spacecraft, which operated in Mars orbit from September
Mars_Orbiter_Laser_Altimeter
1965 aviation accident
most likely the result of the pilots misreading their three-pointer (3p) altimeters by 10,000 feet. At the time of the accident, United Air Lines had 39 other
United_Air_Lines_Flight_389
NASA mission to Mercury
Marie Novo-Gradac; Jamie L. Britt; et al. (2007). "The Mercury Laser Altimeter Instrument for the MESSENGER Mission". Space Science Reviews. 131 (1):
MESSENGER
1996 aviation accident in the Pacific Ocean
rapid loss of altitude with no corresponding change on the altimeter. While the altimeter indicated an altitude of approximately 9,700 feet (3,000 m)
Aeroperú_Flight_603
1990 aviation accident in Switzerland
Mountain and a known problem with errors in reading the drum pointer altimeter of the aircraft. The final report by the Federal Aircraft Accidents Inquiry
Alitalia_Flight_404
American consulting firm
2015, Prophet acquired Altimeter Group, the technology firm founded by Charlene Li. Altimeter operates under the name Altimeter, a Prophet Company. Its
Prophet_(company)
Height measured with respect to the underlying ground surface
(typically under poor visibility conditions) must rely on the aircraft's altimeter to decide when to deploy the undercarriage and prepare for landing. Therefore
Height_above_ground_level
Martian volcano, highest point on Mars
a large shield volcano on Mars. As measured by the Mars Orbiter Laser Altimeter (MOLA), it is 21.287 kilometres (69,840 ft) high, about 2.5 times the
Olympus_Mons
Static pressure exerted by the weight of the Earth's atmosphere
meteorologists on radio, television, and newspapers or on the Internet. The altimeter setting in aviation is an atmospheric pressure adjustment. Average sea-level
Atmospheric_pressure
Airspeed indicator, Tachometer, Oil pressure gauge, Manifold pressure gauge, Altimeter, Temperature gauge, Oil temperature gauge, Fuel quantity gauge, Landing
List_of_aviation_mnemonics
Measurement of the Earth using satellites
of an Earth satellite, allowing for the precise calibration of radar altimeters and separation of long-term instrumentation drift from secular changes
Satellite_geodesy
Earth observation satellite
The Sentinel-6 Michael Freilich (S6MF) or Sentinel-6A is a radar altimeter satellite developed in partnership between several European and American organizations
Sentinel-6_Michael_Freilich
Missile navigation system
is compared with measurements made during flight by an on-board radar altimeter. A TERCOM system considerably increases the accuracy of a missile compared
TERCOM
1995 aviation accident over Connecticut
received an ACARS printout for the weather at Hartford. It noted an altimeter setting (reference atmospheric pressure) of 29.42 inches of mercury (996 hPa)
American_Airlines_Flight_1572
NASA orbiter mission to Mars (1996–2006)
The Mars Orbiter Laser Altimeter (MOLA) – MOLA was designed to determine Mars's global topography. It operated as an altimeter until a portion of the
Mars_Global_Surveyor
Crater on Mercury
the permanently shadowed part of the crater. MESSENGER's Mercury Laser Altimeter (MLA) was used to measure surface reflectance of the surface of the planet
Vonnegut_(crater)
2025 mid-air collision over Washington, D.C.
and the United States Army's failure to ensure pilot understanding of altimeter error tolerances. Flight 5342 was operated by a 20-year-old Bombardier
2025 Potomac River mid-air collision
2025_Potomac_River_mid-air_collision
Measurement unit for pressure
1 inHg60 °F = 0.489 771 psi, or 2.041 771 inHg60 °F = 1 psi. Aircraft altimeters measure the relative pressure difference between the lower ambient pressure
Inch_of_mercury
Aviation instruments
movement through the mechanical linkage. The pressure altimeter, also known as the barometric altimeter, is used to determine changes in air pressure that
Pitot–static_system
Elevation of a location above a standardized sea level
is needed to convert the 3D position to sea-level elevation. Pressure altimeter measuring atmospheric pressure, which decreases as altitude increases
Height_above_mean_sea_level
1967 Soviet Venus probe
could resist temperatures up to 450 °C (723 K). The capsule contained an altimeter, thermal control, a parachute and equipment for making atmospheric measurements
Venera_4
1995 aviation accident in New Zealand
Radar altimeter antennas are clearly embossed with the words, "do not paint", a warning that was not heeded. Bench testing of the radar altimeter proved
Ansett_New_Zealand_Flight_703
1941 aviation accident
reporting point and was descending. The operator provided the pilots with the altimeter setting for Candler Field and with the current weather. Flight 21 then
Eastern_Air_Lines_Flight_21
Airborne radio transponder
comes from the pilot's altimeter, and is transmitted using a modified Gray code, called a Gillham code. Where the pilot's altimeter does not contain a suitable
Transponder_(aeronautics)
Main body of an aircraft
Air data boom Air data computer Aircraft periscope Airspeed indicator Altimeter Annunciator panel Astrodome Attitude indicator Compass Course deviation
Fuselage
Height in relation to a specified reference point
altimeter set to use either the local sea level pressure or the standard sea level pressure as the basis for zero altitude. GPS and radio altimeters are
Altitude
Use of radar systems mounted on satellites
(SAR, altimeter, scatterometer, US, 1978) Geosat (altimeter, United States, 1985-1990) ERS-1 and ERS-2 (European Remote-Sensing Satellite) (altimeter, combined
Space-based_radar
Geographical reference point from which various heights are measured
the Amsterdam Peil elevation, which dates back to the 1690s. Satellite altimeters have been making precise measurements of sea level since the launch of
Sea_level
Salt flat in Bolivia
exceptional flatness of the surface make the Salar ideal for calibrating the altimeters of Earth observation satellites. Following rain, a thin layer of dead
Salar_de_Uyuni
2000 aviation accident in the Atlantic Ocean
proximity warning system (GPWS) then sounded briefly, though the radio altimeter sent out warnings seconds after, cutting off the GPWS warning. The master
Kenya_Airways_Flight_431
2025 aviation accident in Russia
the aircraft's systems. Russian investigators have indicated that an altimeter pressure-reference error contributed to the crash. The Federal Air Transport
Angara_Airlines_Flight_2311
1983 uncrewed Soviet spacecraft to Venus
parabolic dish antenna for the radio altimeter was also located at this end. The electrical axis of the radio altimeter antenna was lined up with the axis
Venera_16
Control surface for fluid-dynamic steering in the yaw axis
Air data boom Air data computer Aircraft periscope Airspeed indicator Altimeter Annunciator panel Astrodome Attitude indicator Compass Course deviation
Rudder
1974 aviation accident
This might have been caused by the setting and design of the altimeter itself. The altimeters had been set by Eastern Airlines according to the aircraft's
Eastern_Air_Lines_Flight_212
American artificial intelligence company
September 2024, Glean raised over $260 million in Series E funding, co-led by Altimeter Capital and DST Global, taking its valuation to $4.6 billion. In June
Glean_Technologies
Flat expanse of ground covered with salt and other minerals
flatness of the surface make the Salar an ideal object for calibrating the altimeters of Earth observation satellites. Parts of Rann of Kutch (India) are salt
Salt_flat
Soviet probe
instrumentation included temperature, pressure, and light sensors as well as an altimeter, gamma ray spectrometer, gas analyzer, and radio transmitters. The spacecraft
Venera_8
Satellite oceanography mission
Jason-1 was a satellite altimeter oceanography mission. It sought to monitor global ocean circulation, study the ties between the ocean and the atmosphere
Jason-1
Brevity codes used for aviation
edition 8, amendment 30, 2010.November.18 (PDF). Retrieved 2025-10-30. Altimeter Pressure Settings Archived 2024-06-19 at the Wayback Machine CAA CAP493
Aeronautical_Code_signals
3D computer-generated imagery and measurements of terrain
include the Mars Orbiter Laser Altimeter (MOLA) mapping of Mars, the Lunar Orbital Laser Altimeter (LOLA) and Lunar Altimeter (LALT) mapping of the Moon,
Digital_elevation_model
Automated sensor suites
terms of what parameters they measure: AWOS A: barometric pressure and altimeter setting (in inches of Mercury). AWOS I: wind speed and wind gusts (in
Automated airport weather station
Automated_airport_weather_station
2017 American film
Retrieved August 26, 2018. "Scotty and the Secret History of Hollywood". Altimeter Films. "Scotty and the Secret History of Hollywood". Tiff.net. Retrieved
Scotty and the Secret History of Hollywood
Scotty_and_the_Secret_History_of_Hollywood
Air crash near Zahedan airport
minimum safe altitude of 6,500 feet (1,981 m), with a malfunctioning altimeter cited as a possible contributing factor. At the time of the accident,
1986 Iranian Air Force C-130 crash
1986_Iranian_Air_Force_C-130_crash
NASA/CNES oceanography mission (2022–present)
The Surface Water and Ocean Topography (SWOT) mission is a satellite altimeter jointly developed and operated by NASA and CNES, the French space agency
Surface Water and Ocean Topography
Surface_Water_and_Ocean_Topography
Undercarriage of aircraft or spacecraft
Air data boom Air data computer Aircraft periscope Airspeed indicator Altimeter Annunciator panel Astrodome Attitude indicator Compass Course deviation
Landing_gear
South Korean anti-ship missile
started in 1996. Microwave seeking system Inertial navigation system Radar altimeter Electronic jamming system SS-760K turbofan engine After 7 years of research
SSM-700K_C-Star
Broadcast of aeronautical information
visibility, obstructions to vision, sky condition, temperature, dew point, altimeter setting, density altitude advisory if appropriate; and other pertinent
Automatic terminal information service
Automatic_terminal_information_service
Aerial bomb without guidance, designed for ballistic delivery
a penetration effect is required. Alternatives include a fuze with an altimeter to cause an air burst at the desired altitude, and a proximity fuze to
Unguided_bomb
Electronic systems used on aircraft
systems such as ground-proximity warning systems (GPWS), which use radar altimeters as a key element. One of the major weaknesses of GPWS is the lack of "look-ahead"
Avionics
Planetary defence spacecraft developed by the ESA
has a mass of 1,128 kg (2,487 lb) and carries a payload of cameras, an altimeter, and a spectrometer. It is carrying two small CubeSat spacecraft, called
Hera_(space_mission)
1989 aviation accident in Portugal
sharply from 1,751 feet (534 m) to 1,869 feet (570 m). As a result radio altimeter then gave a warning signal and then the Ground Proximity Warning System
Independent_Air_Flight_1851
Satellite mission to map ocean surface topography
TOPEX/Poseidon was a joint satellite altimeter mission between NASA, the U.S. space agency; and CNES, the French space agency, to map ocean surface topography
TOPEX/Poseidon
Tail section of an aircraft containing stabilisers
Air data boom Air data computer Aircraft periscope Airspeed indicator Altimeter Annunciator panel Astrodome Attitude indicator Compass Course deviation
Empennage
Earth observation satellite
Sentinel-6B is a radar altimeter satellite developed in partnership between several European and American organizations. It is part of the Jason satellite
Sentinel-6B
Ivanov led the development of radar altimeter, which controlled the landing of Luna 9. Thanks to that altimeter Luna 9 became the first spacecraft to
Vladimir_Ivanov_(engineer)
Financial technology company
2021. Wilhelm, Alex (April 7, 2021). "Plaid raises $425M Series D from Altimeter as it charts a post-Visa future". Techcrunch. Rooney, Kate (April 3, 2025)
Plaid_Inc.
American documentary television series
is produced by three media companies: MediaWeaver, Four M Studios and Altimeter Films, premiered on April 17, 2020. On June 8, 2020, Home was nominated
Home_(2020_TV_series)
1960 aviation accident
the captain's altimeter (the left-hand altimeter) was adjusted to show a different altitude to the copilot's altimeter. The left altimeter's barometric sub-scale
Austrian_Airlines_Flight_901
Geopotential descriptions used by the US DoD
longitude of the world. NIMA also computed and made available 30′×30′ mean altimeter derived gravity anomalies from the GEOSAT Geodetic Mission. 15′×15′ is
Earth_Gravitational_Model
1996 aviation accident in Florida
voice recording and correlated with a brief and dramatic spike in the altimeter reading in the flight data recording were attributed to the sudden cabin-pressure
ValuJet_Flight_592
1966 aviation accident
cited for the accident in the official report was a wrong setting of the altimeter. With 98 fatalities this is the deadliest aircraft incident in Slovenia
Britannia_Airways_Flight_105
1985 aviation accident in Spain
of the altimeter that had been used in the Boeing 727. The involved aircraft was equipped with the drum and needle altimeter, a type of altimeter that has
Iberia_Flight_610
1957 aviation accident in Oklahoma
a mechanical problem with the altimeters on the plane. Investigators after the crash found that the captain's altimeter read −200 feet (−61 m) when it
American_Airlines_Flight_327
Avionics system to avoid aircraft collision
(GPWS), or Ground collision warning system (GCWS), which uses a radar altimeter to detect proximity to the ground or unusual descent rates. GPWS is common
Airborne collision avoidance system
Airborne_collision_avoidance_system
American cloud integration platform company
Kogias. It has received investment from entities including ServiceNow, Altimeter Capital, Insight Partners, and Redpoint Ventures. The company laid off
Workato
Topics referred to by the same term
a small Plateau language of Nigeria Combined altitude radar altimeter, a radar altimeter with both analog and digital displays Comprehensive Addiction
Cara
Emergency aircraft escape system
Air data boom Air data computer Aircraft periscope Airspeed indicator Altimeter Annunciator panel Astrodome Attitude indicator Compass Course deviation
Ejection_seat
Very low-altitude flight technique
reference by pilots who are experienced in low flying. Data from a radar altimeter or terrain-following radar system is also used, the latter enabling low
Nap-of-the-earth
1990 aviation accident in India
the crew of Flight 605 seemed to be unaware of it. The plane's radio altimeter then sounded: "400 ft". This probably alerted Captain Gopujkar in some
Indian_Airlines_Flight_605
International Earth observation satellite mission
Jason-3 is a satellite altimeter created by a partnership of the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) and
Jason-3
1983 uncrewed Soviet spacecraft to Venus
parabolic dish antenna for the radio altimeter was also located at this end. The electrical axis of the radio altimeter antenna was lined up with the axis
Venera_15
American reality television series episodes
Strange Case of Dr. Jekyll and Mr. Hyde; two Victorian-era pewter mugs; an altimeter from a Howard Hughes plane, which turns out to actually be a steam boiler
List_of_Pawn_Stars_episodes
Topics referred to by the same term
solving Surface Water and Ocean Topography (SWOT), a NASA/CNES satellite altimeter Swat (disambiguation) This disambiguation page lists articles associated
SWOT
1958 aviation accident
this type of altimeter in this long distance, high altitude aircraft. As a direct result of this and other similar incidents, altimeters would now be
1958 BOAC Bristol Britannia crash
1958_BOAC_Bristol_Britannia_crash
Electronic flight control system
and interpret input from multiple sensors simultaneously (such as the altimeters and the pitot tubes) and adjust the controls in real time. The computers
Fly-by-wire
Device that reacts to the loss of the operator
A dead man's switch is a switch that is designed to be activated or deactivated if the human operator becomes incapacitated, such as through abandonment
Dead_man's_switch
Process to maintain internal air pressure in aircraft or spacecraft
Pilots can use a "cabin altimeter" (also known as a cabin differential pressure gauge) to measure the difference between inside and outside pressure.
Cabin_pressurization
2017 proposed NASA Triton orbiter space probe
spectrometer, an infrared camera that sees through the atmosphere, and a radar altimeter. Oceanus is led by Christophe Sotin, the chief scientist for Solar System
Oceanus_(Titan_orbiter)
Third planet from the Sun
Walter H. F. (7 July 2006). "Exploring the Ocean Basins with Satellite Altimeter Data". NOAA/NGDC. Archived from the original on 15 July 2014. Retrieved
Earth
Electronic flight instrument system
flight instruments, such as the attitude indicator, airspeed indicator, altimeter, heading indicator, and course deviation indicator. A small map called
Garmin_G1000
Type of air data system
Air data boom Air data computer Aircraft periscope Airspeed indicator Altimeter Annunciator panel Astrodome Attitude indicator Compass Course deviation
Synthetic_air_data_system
Fuel container that automatically seals when punctured
Air data boom Air data computer Aircraft periscope Airspeed indicator Altimeter Annunciator panel Astrodome Attitude indicator Compass Course deviation
Self-sealing_fuel_tank
Adage Capital Management Alphadyne Asset Management AlphaSimplex Group Altimeter Capital Angelo Gordon Appaloosa Management AQR Capital Management Archegos
List_of_hedge_funds
ALTIMETER
ALTIMETER
ALTIMETER
ALTIMETER
Girl/Female
Australian, British, Christian, English, French, Latin
Female Version of Decimus; Tenth
Surname or Lastname
English
English : variant spelling of Wickson.
Boy/Male
Muslim
Guidance, Rectitude
Boy/Male
Muslim
Calm, Composed
Girl/Female
Tamil
Athulya | அதà¯à®²à¯à®¯à®¾
Unequalled, Unrivalled, Immeasurable, Unique, Unweigh able, Incomparable
Girl/Female
Arabic, Australian, German
Lady; Battle-mighty
Boy/Male
English Norse Teutonic
From Denmark.
Girl/Female
Latin
Profit.
Girl/Female
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
Flower
Boy/Male
Indian
ALTIMETER
ALTIMETER
ALTIMETER
ALTIMETER
ALTIMETER
n.
An instrument for taking altitudes, as a quadrant, sextant, etc.