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SIGMET
SIGMET, or Significant Meteorological Information (AIM 7-1-6), is a severe weather advisory that contains meteorological information concerning the safety of all aircraft. Compared to AIRMETs, SIGMETs cover more severe weather. Today, according to the advancement of technology in civil aviation, the SIGMET is sent as IWXXM model. Types There are three main types of internationally recognized SIGMETs per ICAO: * Volcanic ash (VA or WA SIGMET) * Tropical Cyclone (TC or WC SIGMET) * Other En-route weather phenomenon (WS SIGMET), which may consist of ** Thunderstorm types ** Turbulences types ** Mountain waves ** Icing/Sleet/Hail ** Dust or sand storms ** Radioactive Cloud This information is usually broadcast on the ATIS at ATC facilities, as well as over VOLMET stations. They are assigned an alphabetic designator from N through Y (excluding S and T). SIGMETs are issued as needed, and are valid up to four hours. SIGMETS for hurricanes and volcanic ash outside the CONUS are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AIRMET
An AIRMET, or Airmen's Meteorological Information, is a concise description of weather phenomena that are occurring or may occur (forecast) along an air route that may affect aircraft safety. Compared to SIGMETs, AIRMETs cover less severe weather: moderate turbulence and icing, sustained surface winds of 30 knots or more, or widespread restricted visibility. Today, according to the advancement of technology in civil aviation, the AIRMET is sent as IWXXM model. Types AIRMETs are broadcast on the ATIS at ATC facilities, and are referred to as Weather Advisories. AIRMETs are valid for six hours. NOTE: The definition has changed and no longer says "light aircraft"; AIRMETs are intended for ''all'' aircraft. There are three types of AIRMET, all identified by a phonetic letter: S (Sierra), T (Tango), and Z (Zulu). * AIRMET SIERRA (Mountain obscuration or IFR) ceilings less than 1000 feet and/or visibility less than 3 miles affecting over 50% of the area at one time; extensive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IWXXM
ICAO Meteorological Information Exchange Model (IWXXM) is a format for reporting weather information in XML/ GML. IWXXM includes XML/ GML-based representations for products standardized in International Civil Aviation Organization (ICAO) Annex III, such as METAR/ SPECI, TAF, SIGMET, AIRMET, Tropical Cyclone Advisory (TCA), Volcanic Ash Advisory (VAA), Space Weather Advisory and World Area Forecast System (WAFS) Significant Weather (SIGWX) Forecast. IWXXM products are used for operational exchanges of meteorological information for use in aviation. ICAO Annex 3 defines what IWXXM capability is required at different time frames. These capabilities can also be considered in context of the ICAO SWIM-concept (Doc 10039, Manual on System Wide Information Management (SWIM) Concept). Unlike the traditional forms of the ICAO Annex III products, IWXXM is not intended to be directly used by aircraft pilots. IWXXM is designed to be consumed by software acting on behalf of pilots, such as d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PIREP
A pilot report or PIREP is a report of actual flight or ground conditions encountered by an aircraft. Reports commonly include information about atmospheric conditions (like temperature, icing, turbulence) or airport conditions (like runway condition codes or ground equipment failures). This information is usually relayed by radio to the nearest ground station, but other options (e.g. electronic submission) also exist in some regions. The message would then be encoded and relayed to other weather offices and air traffic service units. Although the actual form used to record the PIREP may differ from one country to another, the standards and criteria will remain almost the same. At a minimum the PIREP must contain a header, aircraft location, time, flight level, aircraft type and one other field. In recent years, a PIREP will also include UA or UUA used to identify the PIREP as routine or urgent. Included data Mandatory *UA or UUA used to identify the PIREP as routine or urgen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VOLMET
VOLMET (French origin ''vol'' (flight) and ''météo'' (weather report)), or meteorological information for aircraft in flight, is a worldwide network of radio stations that broadcast TAF, SIGMET and METAR reports on shortwave frequencies, and in some countries on VHF too. Reports are sent in upper sideband mode, using automated voice transmissions. Pilots on international routes, such as North Atlantic Tracks, use these transmissions to avoid storms and turbulence, and to determine which procedures to use for descent, approach, and landing. The VOLMET network divides the world into specific regions, and individual VOLMET stations in each region broadcast weather reports for specific groups of air terminals in their region at specific times, coordinating their transmission schedules so as not to interfere with one another. Schedules are determined in intervals of five minutes, with one VOLMET station in each region broadcasting reports for a fixed list of cities in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AWC Convective SIGMET Areas Of Responsibility
AWC is a three letter acronym that may refer to: Educational institutions * Allegheny Wesleyan College, a private liberal arts college in Ohio *Air War College, a part of Air University, at Maxwell-Gunter Air Force Base, Alabama Military and Weapons *PAF Air War College, a senior staff and war college of the Pakistan Air Force *Air Warfare Centre, a Royal Air Force Unit located at RAF Waddington and several other units around the UK *Air Weapons Complex, a development and production center for airborne weapons systems in Pakistan *Wiesel AWC, a kind of German armoured vehicle * Arctic Warfare Covert, an Accuracy International sniper rifle variant *AWC TM-Amphibian "S", integrally-suppressed variant of the Ruger MK II Target *AWC Ultra II, integrally-suppressed variant of the Ruger 10/22 Organizations *Afghan Women's Council *American Wood Council, affiliate of the American Forest & Paper Association *Association for Women in Communications *Australian Wildlife Conservancy Other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth Sciences Data Formats
Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering Water distribution on Earth, 70.8% of Earth's crust. The remaining 29.2% of Earth's crust is land, most of which is located in the form of continental landmasses within Earth's land hemisphere. Most of Earth's land is at least somewhat humid and covered by vegetation, while large Ice sheet, sheets of ice at Polar regions of Earth, Earth's polar polar desert, deserts retain more water than Earth's groundwater, lakes, rivers, and Water vapor#In Earth's atmosphere, atmospheric water combined. Earth's crust consists of slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth's outer core, Earth has a liquid outer core that generates a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviation Meteorology
Meteorology is the scientific study of the Earth's atmosphere and short-term atmospheric phenomena (i.e. weather), with a focus on weather forecasting. It has applications in the military, aviation, energy production, transport, agriculture, construction, weather warnings and disaster management. Along with climatology, atmospheric physics and atmospheric chemistry, meteorology forms the broader field of the atmospheric sciences. The interactions between Earth's atmosphere and its oceans (notably El Niño and La Niña) are studied in the interdisciplinary field of hydrometeorology. Other interdisciplinary areas include biometeorology, space weather and planetary meteorology. Marine weather forecasting relates meteorology to maritime and coastal safety, based on atmospheric interactions with large bodies of water. Meteorologists study meteorological phenomena driven by solar radiation, Earth's rotation, ocean currents and other factors. These include everyday weathe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notes
Note, notes, or NOTE may refer to: Music and entertainment * Musical note, a pitched sound (or a symbol for a sound) in music * ''Notes'' (album), a 1987 album by Paul Bley and Paul Motian * ''Notes'', a common (yet unofficial) shortened version of the title of the American TV situation comedy, ''Notes from the Underbelly'' * ''Notes'' (film), a short by John McPhail * ''Notes'' (journal), the quarterly journal of the Music Library Association Finance * Banknote, a form of cash currency, also known as ''bill'' in the United States and Canada * Promissory note, a contract binding one party to pay money to a second party * Note, a security (finance), a type of bond Technology and science * IBM Notes, (formerly Lotus Notes), a client-server, collaborative application owned by IBM Software Group * Natural orifice transluminal endoscopic surgery (NOTES), a type of minimally invasive surgery * Notes (Apple), a note-taking application bundled with macOS and iOS * Notes, another ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmospheric Convection
Atmospheric convection is the vertical transport of heat and moisture in the atmosphere. It occurs when warmer, less dense air rises, while cooler, denser air sinks. This process is driven by parcel-environment instability, meaning that a "parcel" of air is warmer and less dense than the surrounding environment at the same altitude. This difference in temperature and density (and sometimes humidity) causes the parcel to rise, a process known as buoyancy. This rising air, along with the compensating sinking air, leads to mixing, which in turn expands the height of the planetary boundary layer (PBL), the lowest part of the atmosphere directly influenced by the Earth's surface. This expansion contributes to increased winds, cumulus cloud development, and decreased surface dew points (the temperature below which condensation occurs). Convection plays a crucial role in weather patterns, influencing cloud formation, wind, and the development of thunderstorms, which can be associa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NATO Phonetic Alphabet
The International Radiotelephony Spelling Alphabet or simply the Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear-code words for communicating the letters of the Latin/Roman alphabet. Technically a ''radiotelephonic spelling alphabet'', it goes by various names, including NATO spelling alphabet, ICAO phonetic alphabet, and ICAO spelling alphabet. The ITU phonetic alphabet and figure code is a rarely used variant that differs in the code words for digits. Although spelling alphabets are commonly called "phonetic alphabets", they are not phonetic in the sense of phonetic transcription systems such as the International Phonetic Alphabet. To create the code, a series of international agencies assigned 26 clear-code words (also known as "phonetic words") acrophonically to the letters of the Latin alphabet, with the goal that the letters and numbers would be easily distinguishable from one another over radi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Contiguous United States
The contiguous United States, also known as the U.S. mainland, officially referred to as the conterminous United States, consists of the 48 adjoining U.S. states and the District of Columbia of the United States in central North America. The term excludes the only two non- contiguous states and the last two to be admitted to the Union, which are Alaska and Hawaii, and all other offshore insular areas, such as the U.S. territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands. The colloquial term ''Lower48'' is also used, especially in relation to Alaska. The term The Mainland is used in Hawaii. The related but distinct term ''continental United States'' includes Alaska, which is also on North America, but separated from the 48 states by British Columbia in Canada, but excludes Hawaii and all the insular areas in the Caribbean and the Pacific. The greatest distance on a great-circle route entirely within the contiguous U.S. i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
