Aliases
Disambiguation
Scientific and technical term referring to the measurement methodology for determining vertical distance/elevation. Not to be confused with 'altitude' (the measurement itself) or specific altitude records.
Stats
Concept
The vertical distance of an object or vehicle measured from a reference datum (typically mean sea level), determined through multiple methods including barometric pressure altimeters, radar altimeters, laser altimeters, sonic altimeters, and satellite navigation systems (GPS).
A distância vertical de um objeto ou veículo medida a partir de um datum de referência (tipicamente o nível do mar), determinada por múltiplos métodos incluindo altímetros de pressão barométrica, altímetros de radar, altímetros a laser, altímetros sônicos e sistemas de navegação por satélite (GPS).
Enrichment
- AltimeterWikipedia▎ high· 2026-05-14
- Five primary altimeter types: pressure, sonic, radar, laser, and satellite navigation
- Radar altimeters achieve greater accuracy than pressure altimeters
- Laser altimeters use Lidar technology for autonomous navigation
- Pressure altimeters calibrate barometer readings to display altitude rather than raw pressure
- AltitudeWikipedia▎ high· 2026-05-14
- Altitude is vertical distance measurement between a reference datum and a point or object
- Six distinct altitude types used in aviation: indicated, absolute, true, height, pressure, density altitude
- True altitude calculated by correcting indicated altitude for non-standard temperature and pressure
- Pressure altitude used for flight level reporting in Class A airspace
- Records Related to Unidentified Flying Objects (UFOs) and Unidentified Anomalous Phenomena (UAPs) at the National ArchivesNational Archives and Records Administration▎ high· 2026-05-14
- National Archives established Record Group 615 via 2024 NDAA for dedicated UAP Records Collection
- Collections include photographs, moving images, textual records, and presidential library documents
- UAP records dating back to 1947 have been declassified
- Altitude measurement is an implicit parameter in UAP investigation documentation
- AN/APN-232 Combined Altitude Radar Altimeter (CARA)GlobalSecurity.org▎ high· 2026-05-14
- AN/APN-232 CARA is standard US Air Force radar altimeter system
- Operating frequency: 4.3 GHz, range: 0 to 50,000 feet
- All-solid-state FM/CW radar altimeter design
- Deployed on C-5, C-17, C-130, F-15, F-16, and other military aircraft
altitude measurement
Description (EN)
Stub generated by entity dedup. Will be enriched in Phase 6.
Descrição (PT-BR)
Stub gerado pela deduplicação de entidades. Será enriquecido na Fase 6.
<!-- enrichment:start -->Enrichment (EN)
Disambiguation: Scientific and technical term referring to the measurement methodology for determining vertical distance/elevation. Not to be confused with 'altitude' (the measurement itself) or specific altitude records.
Altitude measurement is the scientific and technical methodology for determining the vertical distance of an object or aircraft from a reference datum, typically mean sea level. In aviation and UAP investigation contexts, altitude measurement employs multiple complementary systems: barometric (pressure) altimeters, radar altimeters (which measure distance via radio wave reflection), laser altimeters (using lidar), sonic altimeters, and satellite navigation systems (GPS). The choice of measurement method affects accuracy and reliability; radar altimeters are preferred in military and low-altitude operations, while pressure altimeters remain standard for commercial aviation. In historical UAP documentation, altitude measurements are a critical parameter for characterizing encounters, though many pre-digital records lack precision or employ multiple reference standards simultaneously.
Enriquecimento (PT-BR)
Desambiguação: Scientific and technical term referring to the measurement methodology for determining vertical distance/elevation. Not to be confused with 'altitude' (the measurement itself) or specific altitude records.
Medição de altitude é a metodologia científica e técnica para determinar a distância vertical de um objeto ou aeronave a partir de um datum de referência, tipicamente o nível do mar. Em contextos de aviação e investigação de UAP, a medição de altitude emprega múltiplos sistemas complementares: altímetros barométricos (pressão), altímetros de radar (que medem distância via reflexão de ondas de rádio), altímetros a laser (usando lidar), altímetros sônicos e sistemas de navegação por satélite (GPS). A escolha do método de medição afeta a precisão e confiabilidade; altímetros de radar são preferidos em operações militares e de baixa altitude, enquanto altímetros de pressão permanecem padrão na aviação comercial. Em documentação histórica de UAP, medições de altitude são um parâmetro crítico para caracterizar encontros, embora muitos registros pré-digitais careçam de precisão ou empreguem múltiplos padrões de referência simultaneamente.
External Sources
- Altimeter · Wikipedia · reliability:
high— Five primary altimeter types: pressure, sonic, radar, laser, and satellite navigation; Radar altimeters achieve greater accuracy than pressure altimeters; Laser altimeters use Lidar technology for autonomous navigation; Pressure altimeters calibrate barometer readings to display altitude rather than raw pressure - Altitude · Wikipedia · reliability:
high— Altitude is vertical distance measurement between a reference datum and a point or object; Six distinct altitude types used in aviation: indicated, absolute, true, height, pressure, density altitude; True altitude calculated by correcting indicated altitude for non-standard temperature and pressure; Pressure altitude used for flight level reporting in Class A airspace - Records Related to Unidentified Flying Objects (UFOs) and Unidentified Anomalous Phenomena (UAPs) at the National Archives · National Archives and Records Administration · reliability:
high— National Archives established Record Group 615 via 2024 NDAA for dedicated UAP Records Collection; Collections include photographs, moving images, textual records, and presidential library documents; UAP records dating back to 1947 have been declassified; Altitude measurement is an implicit parameter in UAP investigation documentation - AN/APN-232 Combined Altitude Radar Altimeter (CARA) · GlobalSecurity.org · reliability:
high— AN/APN-232 CARA is standard US Air Force radar altimeter system; Operating frequency: 4.3 GHz, range: 0 to 50,000 feet; All-solid-state FM/CW radar altimeter design; Deployed on C-5, C-17, C-130, F-15, F-16, and other military aircraft