Flightradar24 is a flight tracker that shows live air traffic from around the world. Flightradar24 c

Blog này được mở như một thư viện lưu động nhằm lưu những bài viết hay hoặc lạ, đôi khi trái chiều, và một số bài viết cũ còn giữ lại được của chủ Blog về mô hình hóa kinh tế vĩ mô (macroeconomic modelling) và kinh tế lượng (econometrics) để bạn đọc nào thích thì tham khảo. Chân thành cám ơn các tác giả có bài viết mà chủ Blog chưa xin phép trước song đã lưu ở đây cho mọi người cùng đọc. Chủ Blog không giữ bản quyền đối với mọi bài viết và bình luận của mình. Email: laitranmai@gmail.com
http://www.flightradar24.com/ Xin giới thiệu quý vị website : http://www.flightradar24.com/ .website này giúp theo dõi mọi chuyến bay trên hành tình này ... khắp năm châu ... Dùng trong trường hợp có đi đón ai hoặc muốn biết người thân mình đi nơi xa có bị trễ máy bay hoặc gặp trở ngại . Cứ search (bên góc trái) hoặc click vào một chiếc máy bay trên đường bay, chúng ta sẽ biết hãng máy bay, số máy bay .. đầy đủ chi tiết ... Hãy thử coi. Đây là một chuyến đang bay về phi trường Chicago.
Flightradar24 is a flight tracker that shows live air traffic from around the world. Flightradar24 combines data from several data sources including ADS-B, MLAT and FAA. The ADS-B, MLAT and FAA data is aggregated together with schedule and flight status data from airlines and airports to create a unique flight tracking experience on www.flightradar24.com and in Flightradar24 apps. ADS-B The primary technology that we use to receive flight information is called automatic dependent surveillance-broadcast (ADS-B). The ADS-B technology itself is best explained by the image to the right. Aircraft gets its location from a GPS navigation source (satellite) The ADS-B transponder on aircraft transmits signal containing the location (and much more) ADS-B signal uei remote is picked up by a receiver connected to Flightradar24 Receiver feeds data to Flightradar24 Data is shown on www.flightradar24.com uei remote and in Flightradar24 apps Today, roughly 60% of all passenger aircraft (70% in Europe, 30% in the US) are equipped with an ADS-B transponder. This percentage is steadily increasing as ADS-B is set to replace radar as the primary surveillance method for controlling aircraft. Flightradar24 has a network of about 2000 ADS-B receivers around the world that receives plane and flight information from aircraft with ADS-B transponders and sends this information to our servers. Due to the high frequency used (1090 MHz) the coverage from each receiver is limited to about 250-400 km (150-250 miles) in all directions depending on location. The farther away from the receiver an aircraft is flying, the higher uei remote it must fly to be covered by the receiver. The distance limit makes it very hard to get ADS-B coverage over oceans. About 98% of Europe is covered with ADS-B receivers. There is also good ADS-B coverage in USA, Canada, Caribbean, Brazil, Russia, Middle East, India,Japan, Thailand, Malaysia and Australia. In other parts of the world the ADS-B coverage varies. MLAT In some regions with coverage from several FR24-receivers we also calculate positions of aircraft with the help of Multilateration (MLAT), by using a method known as Time Difference of Arrival (TDOA). By measuring the difference in time to receive the signal from aircraft with an older ModeS-transponder, uei remote it's possible to calculate uei remote the position of these aircraft. Four FR24-receivers or more, receiving signals from the same aircraft, are needed to make MLAT work. That means that MLAT coverage can only be achieved above about 10000-20000 feet as the probability that signal can be received by four or more receivers increases with increased altitude. MLAT coverage is today limited to some parts of Europe and North America, but expanding fast. FAA In addition to ADS-B and MLAT data, we also get data from the Federal Aviation Administration (FAA) in the United States. Unlike the ADS-B and MLAT data that is presented real-time, the FAA data is delayed by roughly 5 minutes uei remote due to FAA regulations. On the Flightradar24 map, all aircraft based on FAA data are orange. FAA data is based on radar data (i.e. not just planes with ADS-B transponders) and includes most scheduled and commercial air traffic in US and Canadian air space + parts of Atlantic and Pacific Ocean. Aircraft visible on Flightradar24 (within ADS-B coverage) uei remote Common aircraft models that usually have an ADS-B transponder and are visible on Flightradar24 (within ADS-B coverage): All Airbus models (A300, A310, A318, A319, A320, A321, A330, A340, A350, A380) Antonov AN-148 uei remote and AN-158 ATR 72-600 (most new deliveries) BAe ATP BAe Avro RJ70, RJ85, RJ100 Boeing 737, 747, 757, 767, 777, 787 Bombardier CS100 and CS300 Embraer E190 (most new deliveries) Fokker 70 and 100 McDonnell uei remote Douglas MD-10, MD-11 Sukhoi SuperJet 100 Some newer Ilyushin and Tupolev (for example Il-96 and TU-204) Common aircraft models uei remote that usually do not have an ADS-B transponder and are not visible on Flightradar24 (within ADS-B coverage): "Air Force One" Antonov AN-124 and AN-225 ATR 42, 72