Udon Thani province is one of Thailand's seventy-six provinces (changwat) which lies in upper northeastern Thailand, also called Isan. It is bordered by the provinces of Nong Khai to the north, Sakon Nakhon to the east, Kalasin province to the southeast, Khon Kaen to the south, and Loei and Nong Bua Lamphu to the west. It occupies an area of 11,072 km2 (4,275 sq mi). The total forest area is 1,131 km2 (437 sq mi) or 10.2 percent of provincial area. The provincial capital is Udon Thani, the major city in the province.
Udon Thani is a city in Isan, the capital of Udon Thani Province and the sixth largest city in Thailand. The city municipality had a population of 130,531 people as of 2019, while Udon Thani's urban area, Mueang Udon Thani, has a population of approximately 400,000. Udon Thani is one of four major cities in Isan, the others being Nakhon Ratchasima, Ubon Ratchathani, and Khon Kaen. Together they are known as the "big four of Isan".
Ministry of Defence Chicksands or more simply MoD Chicksands is a UK Ministry of Defence station located 7.7 miles south east of Bedford, Bedfordshire and 11.6 miles north east of Luton, Bedfordshire. Now the location of the Defence Intelligence and Security Centre (DISC), it was previously named RAF Chicksands.
Karamürsel is a town and district located in northwestern Turkey, on the coast of the Bay of Izmit in the province of Kocaeli. Before its conquest by the Ottomans it used to be called by the Greek name of Praenetos. The modern name commemorates Kara Mürsel who founded the Ottoman navy and designed distinctive galley ships, called kadırgas, for it.
The United States Space Surveillance Network (SSN) detects, tracks, catalogs and identifies artificial objects orbiting Earth, e.g. active/inactive satellites, spent rocket bodies, or fragmentation debris. The system is the responsibility of United States Space Command and operated by the United States Space Force.
The Wullenweber is a type of Circularly Disposed Antenna Array (CDAA) sometimes referred to as a Circularly Disposed Dipole Array (CDDA). It is a large circular antenna array used for radio direction finding. It was used by the military to triangulate radio signals for radio navigation, intelligence gathering and search and rescue. Because its huge circular reflecting screen looks like a circular fence, the antenna has been colloquially referred to as the elephant cage. The term wullenwever was the World War II German cover term used to identify their secret CDAA research and development program; its name is unrelated to any person involved in the program.
United States Army Security Agency (USASA) Field Station Augsburg was the site of a Wullenweber AN/FLR-9 (V8) radio direction finder, established during the Cold War. Field Station Augsburg was located on Gablingen Kaserne, near the village of Gablingen just north of Augsburg in Bavaria, West Germany. It was one of nearly 20 field stations positioned strategically around the world by the U.S. Armed Forces during the Cold War. Field Station Augsburg opened in 1970 and closed in 1998, at which time it was turned over to the German government.
ALLISS is a somewhat rotatable antenna system for high power shortwave radio broadcasting in the 6 MHz to 26 MHz range. An ALLISS module is a self-contained shortwave relay station that is used for international broadcasting.
Alaskan Air Command (AAC) is an inactive United States Air Force Major Command originally established in 1942 under the United States Army Air Forces. Its mission was to organize and administer the air defense system of Alaska, exercise direct control of all active measures, and coordinate all passive means of air defense. In addition, the command also supported Strategic Air Command elements operating through and around Alaska. It was redesignated Eleventh Air Force on 9 August 1990 and, concurrently, status changed from a major command of the United States Air Force to a subordinate organization of Pacific Air Forces.
San Vito dei Normanni Air Station was a United States Air Force facility located 7 miles (11 km) west of Brindisi, Apulia, between the port of Brindisi and the town of San Vito dei Normanni, Italy.
The United States Air Force's 381st Intelligence Squadron is an intelligence unit located at Joint Base Elmendorf-Richardson, Alaska. The unit operated the last operational AN/FLR-9 Circularly Disposed Antenna Array (CDAA), also known as an "Elephant Cage", until 25 May 2016.
Gablingen Kaserne is a former military facility in Gablingen near Augsburg, Germany, which was closed in 1998. Its primary use was signals intelligence collection during the Cold War.
The Solar Observing Optical Network (SOON) consists of three U.S. Air Force (USAF) Air Force Weather Agency (AFWA) solar observatories. AFWA operates a solar telescope at each site to monitor solar active regions at optical wavelengths. The National Geophysical Data Center (NGDC) archives histograms of intensity versus area every minute for the active regions. It also archives magnetograms of the magnetic field structure and tachograms of plasma velocities on an irregular schedule.
Initially established as the Air Force (USAF) Security Group in June, 1948, the USAF Security Service (USAFSS) was activated as a major command on Oct 20, 1948
Elmendorf Air Force Base is a United States Air Force (USAF) facility in Anchorage, Alaska. Originally known as Elmendorf Field, it became Elmendorf Air Force Base after World War II.
Cape Newenham Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 67.5 miles (108.6 km) west-southwest of Togiak, Alaska.
An antenna array is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves. The individual antennas are usually connected to a single receiver or transmitter by feedlines that feed the power to the elements in a specific phase relationship. The radio waves radiated by each individual antenna combine and superpose, adding together to enhance the power radiated in desired directions, and cancelling to reduce the power radiated in other directions. Similarly, when used for receiving, the separate radio frequency currents from the individual antennas combine in the receiver with the correct phase relationship to enhance signals received from the desired directions and cancel signals from undesired directions. More sophisticated array antennas may have multiple transmitter or receiver modules, each connected to a separate antenna element or group of elements.
Eglin AFB Site C-6 is a United States Space Force radar station which houses the AN/FPS-85 phased array radar, associated computer processing system(s), and radar control equipment. Commencing operations in 1969, the AN/FPS-85 was the first large phased array radar. The entire radar/computer system is located at a receiver/transmitter building and is supported by the site's power plant, fire station, 2 water wells, and other infrastructure for the system. As part of the US Space Force's Space Surveillance Network its mission is to detect and track spacecraft and other manmade objects in Earth orbit for the Combined Space Operations Center satellite catalogue. With a peak radiated power of 32 megawatts the Space Force claims it is the most powerful radar in the world, and can track a basketball-sized object up to 22,000 nautical miles (41,000 km) from Earth.
Twenty-Fifth Air Force, also known as Air Force Intelligence, was a numbered air force (NAF) within the United States Air Force (USAF), and served as the Air Force's premier military intelligence organization. 25 AF was established on 29 September 2014 by redesignating the Air Force Intelligence, Surveillance and Reconnaissance Agency under Headquarters, United States Air Force, to a numbered air force aligned under Air Combat Command. The USAF also realigned the 9th Reconnaissance Wing and the 55th Wing under the new NAF. It was headquartered at Lackland Air Force Base, Texas.
The AN/FRD-10 Circularly Disposed Antenna Array (CDAA) is a United States Navy circular "Wullenweber" antenna array, built at a number of locations during the cold war for high frequency radio direction finding (HF/DF) and signals intelligence. In the Joint Electronics Type Designation System, FRD stands for fixed ground, radio, direction finding. 14 sites were originally constructed as a part of the "Classic Bullseye" program. Two AN/FRD-10 systems were later installed in Canada. AN/FRD-10 systems were originally constructed in the early 1960s, but after the dissolution of the Soviet Union, the systems began to be shut down and demolished. The Naval Security Group operated and maintained the U.S. Navy AN/FRD-10 systems. The system had several nicknames including Fred-10 and Elephant or Dinosaur cages. As of 2015, none of the US Navy AN/FRD-10 sites are extant, but the two Canadian sites remain in service. The AN/FLR-9 was a system with a similar design and function, but operated by the US Air Force and Army.
