|
Blitzortung.org
Animated map of a storm front over Central Europe on 16 August 2020 based on data from Blitzortung.org Blitzortung (German for "lightning direction-finding", ) is an informal, non-commercial group of citizen scientists supported by professional scientists. Active since 2005, station operators manage a worldwide network of ~1800 active VLF radio wave receiver stations in 83 countries. These receivers are used to determine the location of lightning strikes based on time-of-flight detector measurements of the received signals. The only compensation that station operators receive is free access to the raw data of all stations. The data is processed by various websites using geoinformatics methods and made available on the Internet as a map display. Targets The goal of Blitzortung.org is worldwide lightning detection with many inexpensive receiving stations. According to the website, such a station costs a maximum of $ to build yourself. According to its own presentation, the in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blitzortung
file:Blitzortung.org stormfront central europe 2020-08-16 anim.gif, Animated map of a storm front over Central Europe on 16 August 2020 based on data from Blitzortung.org Blitzortung (German language, German for "lightning direction-finding", ) is an informal, non-commercial group of citizen science, citizen scientists supported by professional scientists. Active since 2005, station operators manage a worldwide network of ~1800 active very low frequency, VLF radio wave receiver stations in 83 countries. These receivers are used to determine the location of lightning strikes based on time-of-flight detector measurements of the received signals. The only compensation that station operators receive is free access to the raw data of all stations. The data is processed by various websites using geoinformatics methods and made available on the Internet as a map display. Targets The goal of Blitzortung.org is worldwide lightning detection with many inexpensive receiving stations. Acco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blitzortung H-feld-Antenna Blue
Animated map of a storm front over Central Europe on 16 August 2020 based on data from Blitzortung.org Blitzortung (German for "lightning direction-finding", ) is an informal, non-commercial group of citizen scientists supported by professional scientists. Active since 2005, station operators manage a worldwide network of ~1800 active VLF radio wave receiver stations in 83 countries. These receivers are used to determine the location of lightning strikes based on time-of-flight detector measurements of the received signals. The only compensation that station operators receive is free access to the raw data of all stations. The data is processed by various websites using geoinformatics methods and made available on the Internet as a map display. Targets The goal of Blitzortung.org is worldwide lightning detection with many inexpensive receiving stations. According to the website, such a station costs a maximum of $ to build yourself. According to its own presentation, the in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightning
Lightning is a natural phenomenon consisting of electrostatic discharges occurring through the atmosphere between two electrically charged regions. One or both regions are within the atmosphere, with the second region sometimes occurring on the land, ground. Following the lightning, the regions become partially or wholly electrically neutralized. Lightning involves a near-instantaneous release of energy on a scale averaging between 200 megajoules and 7 gigajoules. The air around the lightning flash rapidly heats to temperatures of about . There is an emission of electromagnetic radiation across a wide range of wavelengths, some visible as a bright flash. Lightning also causes thunder, a sound from the shock wave which develops as heated gases in the vicinity of the discharge experience a sudden increase in pressure. The most common occurrence of a lightning event is known as a thunderstorm, though they can also commonly occur in other types of energetic weather systems, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical Rainfall Measuring Mission
The Tropical Rainfall Measuring Mission (TRMM) was a joint space mission between NASA and JAXA designed to monitor and study tropical rainfall. The term refers to both the mission itself and the satellite that the mission used to collect data. TRMM was part of NASA's Mission to Planet Earth, a long-term, coordinated research effort to study the Earth as a global system. The satellite was launched on 27 November 1997 from the Tanegashima Space Center in Tanegashima, Japan. TRMM operated for 17 years, including several mission extensions, before being decommissioned on 15 April 2015. TRMM re-entered Earth's atmosphere on 16 June 2015. Background Tropical precipitation is a difficult parameter to measure, due to large spatial and temporal variations. However, understanding tropical precipitation is important for weather and climate prediction, as this precipitation contains three-fourths of the energy that drives atmospheric wind circulation. Prior to TRMM, the distribution of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austrian Lightning Detection & Information System
ALDIS (Austrian Lightning Detection & Information System) is a sensor network in Austria for the detection and localization of lightning discharge occurring during thunderstorms. In addition to the location of the strike point, the associated peak current is also estimated. ALDIS is a member of the pan-European lightning detection projecEUCLID (EUropean Cooperation for LIghtning Detection). ALDIS was initiated in 1991. Project partners are the OVE (Austrian Electrotechnical Association) and APG (Austrian Power Grid). The detection of lightning, either from cloud-to-ground or within the cloud is accomplished by eight sensors of type LS7002 ( Vaisala), which are distributed across the Austrian territory. The performance of a lightning location system is best described by the main performance parameters detection efficiency (DE), location accuracy (LA), and classification accuracy (CA). In a study by Schwalt et al. (2020) based on data from a high speed video camera and an electri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New South Wales
New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South Australia to the west. Its coast borders the Coral Sea, Coral and Tasman Seas to the east. The Australian Capital Territory and Jervis Bay Territory are Enclave and exclave, enclaves within the state. New South Wales' state capital is Sydney, which is also Australia's most populous city. , the population of New South Wales was over 8.3 million, making it Australia's most populous state. Almost two-thirds of the state's population, 5.3 million, live in the Greater Sydney area. The Colony of New South Wales was founded as a British penal colony in 1788. It originally comprised more than half of the Australian mainland with its Western Australia border, western boundary set at 129th meridian east in 1825. The colony then also includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2019–20 Australian Bushfire Season
The 201920 Australian bushfire season commenced with serious uncontrolled fires in June 2019. , fires this season have burned an estimated , destroyed over 5,900 buildings (including 2,779 homes) and killed at least 34 people. An estimated one billion animals were killed and some endangered species may be driven to extinction. Air quality has dropped to hazardous levels. The cost of dealing with the bushfires is expected to exceed the $4.4 billion of the 2009 Black Saturday fires, and tourism sector revenues have fallen more than $1 billion. By 7 January 2020, the smoke had moved approximately across the South Pacific Ocean to Chile and Argentina. As of 2 January 2020, NASA estimated that of CO had been emitted. From September 2019 fires heavily impacted various regions of the state of New South Wales. In eastern and north-eastern Victoria large areas of forest burnt out of control for four weeks before the fires emerged from the forests in late December. Multiple s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hessischer Rundfunk
(; "Hesse Broadcasting"), shortened to HR (; stylized as hr), is the German state of Hesse's public broadcasting corporation. Headquartered in Frankfurt, it is a member of the national consortium of German public broadcasting corporations, ARD. Studios Dornbusch Broadcasting House, in Bertramstraße, Frankfurt am Main, is home to HR's principal radio and television studios. There are additional radio and television studios in Kassel and Wiesbaden, as well as further radio studios in Darmstadt, Fulda, and Gießen. HR also maintains offices in Berlin, Eltville, Erbach, Limburg an der Lahn, and Marburg. In 2000, HR opened studios on the 53rd floor of the Main Tower in Frankfurt city centre. The corporation is also responsible for the management of ARD's studios in Madrid and Prague. Finance Licensing fees are currently €17.50 per month. Since 2013, every household has been liable for this fee, whether or not there are radio or TV receivers present. The fee is collected b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sprite (weather Phenomenon)
Sprites or red sprites are large-scale electric discharges that occur in the mesosphere, high above thunderstorm clouds, or cumulonimbus, giving rise to a varied range of visual shapes flickering in the night sky. They are usually triggered by the discharges of positive lightning between an underlying thundercloud and the ground. Precis Sprites appear as luminous red-orange flashes. They often occur in clusters above the troposphere at an altitude range of . Sporadic visual reports of sprites go back at least to 1886. They were first photographed on July 4, 1989, by scientists from the University of Minnesota and have subsequently been captured in video recordings thousands of times. Sprites are sometimes inaccurately called upper-atmospheric lightning. However, they are cold plasma phenomena that lack the hot channel temperatures of tropospheric lightning, so they are more akin to fluorescent tube discharges than to lightning discharges. Sprites are associated with vari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyperbolic Navigation
Hyperbolic navigation is a class of radio navigation systems in which a navigation receiver instrument is used to determine location based on the difference in timing of radio waves received from radio navigation beacon transmitters. Such systems rely on the ability of two widely separated stations to broadcast a signal that is highly correlated in time. Typical systems broadcast either short pulses at the same time, or continual signals that are identical in phase. A receiver located at the midpoint between the two stations will receive the signals at the same time or have identical phase, but at any other location the signal from the closer station will be received first or have a different phase. Determining the location of a receiver requires that the two synchronized stations be tuned in at the same time so the signals can be compared. This reveals a ''difference'' in time, corresponding to a relative distance closer to one station or the other. Plotting all the locations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lateration
Trilateration is the use of distances (or "ranges") for determining the unknown position coordinates of a point of interest, often around Earth (geopositioning). When more than three distances are involved, it may be called multilateration, for emphasis. The distances or ranges might be ordinary Euclidean distances (slant ranges) or spherical distances (scaled central angles), as in ''true-range multilateration''; or biased distances (pseudo-ranges), as in ''pseudo-range multilateration''. Trilateration or multilateration should not be confused with ''triangulation'', which uses angles for positioning; and ''direction finding'', which determines the line of sight direction to a target without determining the radial distance. Terminology Multiple, sometimes overlapping and conflicting terms are employed for similar concepts – e.g., ''multilateration'' without modification has been used for aviation systems employing both true-ranges and pseudo-ranges."Multilateration (MLAT) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
