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HawkEye 360
HawkEye 360 is an American geospatial analytics company headquartered in Herndon, Virginia. It is a commercial seller of radio frequency (RF) signal location data gathered by a satellite constellation. History In 2015, HawkEye 360 was started with the idea of using space and RF technology to generate usable data by advanced signal geolocation using small satellites. The main idea was to collect and geolocate RF signals for commercial use. For some time the company received initial seed financing from Allied Minds, a Boston-based venture capital firm, to expand the business. In 2016, HawkEye 360 began contracting the construction of their Pathfinder cluster of satellites with Deep Space Industries (DSI) and UTIAS Space Flight Laboratory (SFL). In November 2016, the company completed the initial Series A round led by Razor's Edge Ventures with major participation from defense industrial base leader, Raytheon. While waiting for the satellites to be built and launched, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chief Executive Officer
A chief executive officer (CEO), also known as a central executive officer (CEO), chief administrator officer (CAO) or just chief executive (CE), is one of a number of corporate executives charged with the management of an organization especially an independent legal entity such as a company or nonprofit institution. CEOs find roles in a range of organizations, including public and private corporations, non-profit organizations and even some government organizations (notably state-owned enterprises). The CEO of a corporation or company typically reports to the board of directors and is charged with maximizing the value of the business, which may include maximizing the share price, market share, revenues or another element. In the non-profit and government sector, CEOs typically aim at achieving outcomes related to the organization's mission, usually provided by legislation. CEOs are also frequently assigned the role of main manager of the organization and the highest-ranking offic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MMSI
A Maritime Mobile Service Identity (MMSI) is effectively a maritime object's international ''maritime telephone number'', a temporarily assigned UID, issued by that object's current flag state, (unlike an IMO, which is a global forever UID). An MMSI comprises a series of nine digits, consisting Maritime Identification Digits(country-codes), concatenated with a specific identifier. Whenever an object is re-flagged, a new MMSI must be assigned. A 'maritime object' could be anything which requests an MMSI identifier. e.g. a vessel, fixed offshore installation, mobile unit, maritime aircraft, coast station, etc. Communications may be routed to 'individual objects', or to 'groups of objects'. A group call to objects can be based on an object's - locale, owner/operator/fleet, type, etc. or combinations thereof. MMSI are formed in such a way that the identity or part thereof can be used by telephone and telex subscribers connected to the general telecommunications network to call a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galwan River
The Galwan River flows from the disputed Aksai Chin area administered by China to the Union Territory of Ladakh, India. It originates near the caravan campsite Samzungling on the eastern side of the Karakoram range and flows west to join the Shyok River. The point of confluence is 102 km south of Daulat Beg Oldi. Shyok River itself is a tributary of the Indus River, making Galwan a part of the Indus River system. The narrow valley of the Galwan River as it flows through the Karakoram mountains has been a flashpoint between China and India in their border dispute. In 1962, a forward post set up by India in the upper reaches of the Galwan Valley caused an "apogee of tension" between the two countries. China attacked and eliminated the post in the 1962 war, reaching its 1960 claim line. In 2020, China attempted to advance further in the Galwan Valley, Ajai ShuklaA new and worrying chapter: Chinese intrusions in Ladakh gather pace Business Standard, 23 May 2020: "That means tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illegal Fishing
Illegal, unreported and unregulated fishing (IUU) is an issue around the world. Fishing industry observers believe IUU occurs in most fisheries, and accounts for up to 30% of total catches in some important fisheries. Illegal fishing takes place when vessels or harvesters operate in violation of the laws of a fishery. This can apply to fisheries that are under the jurisdiction of a coastal state or to high seas fisheries regulated by regional fisheries management organisations (RFMO). According to the UN Food and Agriculture Organization (FAO), Fisheries and Aquaculture Department, illegal fishing has caused losses estimated at US$23 billion per year. Unreported fishing is fishing that has been unreported or misreported to the relevant national authority or RFMO, in contravention of applicable laws and regulations. Unregulated fishing generally refers to fishing by vessels without nationality, vessels flying the flag of a country not party to the RFMO governing that fishing a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spoofing Attack
In the context of information security, and especially network security, a spoofing attack is a situation in which a person or program successfully identifies as another by falsifying data, to gain an illegitimate advantage. Internet Spoofing and TCP/IP Many of the protocols in the TCP/IP suite do not provide mechanisms for authenticating the source or destination of a message, leaving them vulnerable to spoofing attacks when extra precautions are not taken by applications to verify the identity of the sending or receiving host. IP spoofing and ARP spoofing in particular may be used to leverage man-in-the-middle attacks against hosts on a computer network. Spoofing attacks which take advantage of TCP/IP suite protocols may be mitigated with the use of firewalls capable of deep packet inspection or by taking measures to verify the identity of the sender or recipient of a message. Domain name spoofing The term 'Domain name spoofing' (or simply though less accurately, 'Domain spo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electron (rocket)
Electron is a two-stage, partially recoverable orbital launch vehicle developed by Rocket Lab, an American aerospace company with a wholly owned New Zealand subsidiary. Electron was developed to service the commercial small satellite launch market. Its Rutherford engines are the first electric-pump-fed engine to power an orbital-class rocket. Electron is often flown with a kickstage or Rocket Lab's Photon spacecraft. Although the rocket was designed to be expendable, Rocket Lab has recovered the first stage twice and is working towards the capability of reusing the booster. The Flight 26 (F26) booster has featured the first helicopter catch recovery attempt. In December 2016, Electron completed flight qualification. The first rocket was launched on 25 May 2017 in a flight called "It's a Test", reaching space but not achieving orbit due to a glitch in communication equipment on the ground. During its second flight on 21 January 2018, Electron reached orbit and deployed three Cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falcon 9 Block 5
Falcon 9 Block 5 is a Reusable launch system#Partial reusable launch systems, partially reusable two-stage-to-orbit medium-lift launch vehicle designed and manufactured in the United States by SpaceX. It is the fifth version of Falcon 9 Full Thrust, powered by SpaceX Merlin (rocket engine family), Merlin engines burning rocket-grade kerosene (RP-1) and liquid oxygen (LOX). The main changes from Block 3 to Block 5 are higher-thrust engines and improvements to the landing legs. Numerous other small changes helped streamline recovery and re-usability of List of Falcon 9 first-stage boosters, first-stage boosters, increase production rate, and optimize re-usability. Each Block 5 booster is designed to fly 10 times with only minor attention and up to 100 times with refurbishment. In 2018, Falcon 9 Block 5 succeeded the transitional Block 4 version. The maiden flight launched the satellite Bangabandhu-1 on May 11, 2018. The SpaceX CRS-15, CRS-15 mission on June 29 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
COSPAR ID
The International Designator, also known as COSPAR ID, is an international identifier assigned to artificial objects in space. It consists of the launch year, a three-digit incrementing launch number of that year and up to a three-letter code representing the sequential identifier of a piece in a launch. In TLE format the first two digits of the year and the dash are dropped. For example1990-037Ais the Space Shuttle ''Discovery'' on mission STS-31, which carried the Hubble Space Telescope1990-037B into space. This launch was the 37th known successful launch worldwide in 1990. The designation system has been generally known as the COSPAR system, named for the Committee on Space Research (COSPAR) of the International Council for Science. COSPAR subsumed the first designation system, devised at Harvard University. That system used letters of the Greek alphabet to designate artificial satellites. This was based on the scientific naming convention for natural satellites. For exampl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
True Range Multilateration
True most commonly refers to truth, the state of being in congruence with fact or reality. True may also refer to: Places * True, West Virginia, an unincorporated community in the United States * True, Wisconsin, a town in the United States * True, a List of townlands of County Tyrone, townland in County Tyrone, Northern Ireland People * True (singer) (stylized as TRUE), the stage name of Japanese singer Miho Karasawa * True (surname) * True O'Brien (born 1994), an American model and actress Arts, entertainment, and media Music Albums * True (Avicii album), ''True'' (Avicii album), 2013 * True (EP), ''True'' (EP), a 2012 EP by Solange Knowles * True (L'Arc-en-Ciel album), ''True'' (L'Arc-en-Ciel album), 1996 * True (Roy Montgomery and Chris Heaphy album), ''True'' (Roy Montgomery and Chris Heaphy album), 1999 * True (Mika Nakashima album), ''True'' (Mika Nakashima album), 2002 * True (Spandau Ballet album), ''True'' (Spandau Ballet album), 1983 * True (TrinityRoots album), ''Tru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software-Defined Radio
Software-defined radio (SDR) is a radio communication system where components that have been traditionally implemented in analog hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors, etc.) are instead implemented by means of software on a personal computer or embedded system. While the concept of SDR is not new, the rapidly evolving capabilities of digital electronics render practical many processes which were once only theoretically possible. A basic SDR system may consist of a personal computer equipped with a sound card, or other analog-to-digital converter, preceded by some form of RF front end. Significant amounts of signal processing are handed over to the general-purpose processor, rather than being done in special-purpose hardware (electronic circuits). Such a design produces a radio which can receive and transmit widely different radio protocols (sometimes referred to as waveforms) based solely on the software used. Software radios have signif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Testing
{{noref, date=January 2021 Environmental testing is the measurement of the performance of equipment under specified environmental conditions, such as: * extremely high and low temperatures * large, swift variations in temperature * blown and settling sand and dust * salt spray and salt fog * very high or low humidity * wet environments, waterproofness, icing * presence of corrosive material * fungus, fluids susceptibility * vibrations (airborne and structural), gun fire * accelerations * solar radiation * high and low pressures (especially for aeronautical and space equipment) * operating at angles (especially for marine, aeronautical and space equipment) * electromagnetic interference (EMI), ESD, Lightning * acoustic measurements * power input variations Such tests are most commonly performed on equipment used in military, maritime, aeronautical and space applications. See Environmental test chambers for more information about environmental testing equipment. Environmental test st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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