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Air Force Space Surveillance System
The AN/FPS-133 Air Force Space Surveillance System, colloquially known as the Space Fence, was a U.S. government multistatic radar system built to detect orbital objects passing over America. It is a component of the U.S. space surveillance network, and according to the U.S. Navy was able to detect basketball sized () objects at heights up to . The system ceased operation in September 2013. Plans for a new space fence are underway with sites at the Kwajalein Atoll in the Marshall Islands, along with an option for another radar site in Western Australia. The operation's headquarters were at Dahlgren, Virginia, and radar stations were spread out across the continental United States at roughly the level of the 33rd parallel north. Description There were three transmitter sites in the system: * 216.983 MHz at Lake Kickapoo, Texas () (Master transmitter) * 216.970 MHz at Gila River, Arizona () * 216.990 MHz at Jordan Lake, Alabama () The master transmitter at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NAVSPASUR Fence 2001
The AN/FPS-133 Air Force Space Surveillance System, colloquially known as the Space Fence, was a U.S. government multistatic radar system built to detect orbital objects passing over America. It is a component of the U.S. space surveillance network, and according to the U.S. Navy was able to detect basketball sized () objects at heights up to . The system ceased operation in September 2013. Plans for a new space fence are underway with sites at the Kwajalein Atoll in the Marshall Islands, along with an option for another radar site in Western Australia. The operation's headquarters were at Dahlgren, Virginia, and radar stations were spread out across the continental United States at roughly the level of the 33rd parallel north. Description There were three transmitter sites in the system: * 216.983 MHz at Lake Kickapoo, Texas () (Master transmitter) * 216.970 MHz at Gila River, Arizona () * 216.990 MHz at Jordan Lake, Alabama () The master transmitter at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Kickapoo
Lake Kickapoo is a reservoir located on the North Fork Little Wichita River in the Red River Basin of Archer County, Texas. It is neighbored by Archer City, Texas (population of 1,834) and Wichita Falls, Texas (population of 104,553) which reside within the Central Great Plains ecoregion. Hydrology Lake Kickapoo reservoir was created by the impoundment of North Fork Little Wichita River, its only in-flow tributary, in 1946. The out-flow tributaries are Kickapoo Creek, Brier Creek, and Slippery Creek. It has a mean water level of 1,038 feet, surface area of 4,312 acres, and elevation of 1,060 feet above sea level as of 2022. The storage capacity, as of October 29, 2022, is 51,596 acre-feet with a maximum capacity of 86,345 acre-feet. The reservoir storage has steadily dropped by 293 acre-feet/year since 1945 when it had a total capacity of 106,000 acre-feet, due to increasing drought events in the region. Ecoregion Lake Kickapoo resides within the Broken Red Plains subdivisio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawkinsville
Hawkinsville is a city in and the county seat of Pulaski County, Georgia, Pulaski County, Georgia (U.S. state), Georgia, United States. The population was 4,589 at the 2010 census. Hawkinsville is known as the "Harness Horse Capital" of Georgia. The Lawrence Bennett Harness Horse Racing facility is owned by the city and serves as an important training ground during winter months. The Harness Festival takes place every April at the end of training before horses head north for the harness racing season. History Hawkinsville was founded in 1830. In 1837, the seat of Pulaski County was transferred to Hawkinsville from Hartford, Georgia, Hartford. The community was named for Benjamin Hawkins, delegate to the Continental Congress, and the United States Indian Agent in the Southeast, appointed by President George Washington. The city includes Hawkinsville High School and several historical sites, including Hawkinsville City Hall-Auditorium, Hawkinsville Public School, the Merritt-Raga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elephant Butte, Sierra County, New Mexico
Elephant Butte is a populated place on the southeast end of the Elephant Butte Reservoir in Sierra County, New Mexico, United States. It should not be confused with the modern city of Elephant Butte, New Mexico that is on the west side of the reservoir to the northwest of this place. This site lies at an elevation of and overlooks Elephant Butte to the north, the geographic feature that gives its name to all these locations. Elephant Butte was a town formed to house people and activities supporting the construction of the Elephant Butte Dam Elephant Butte Dam or Elephant Butte Dike, originally Engle Dam, is a concrete gravity dam on the Rio Grande near Truth or Consequences, New Mexico. The dam impounds Elephant Butte Reservoir, which is used mainly for agriculture but also provides ... and had its own post office during 1919 and 1920, when the mail was sent to Engle. Elephant Butte Cemetery lies on a hillside to the east at . Interments at the cemetery date from 1912 to June ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tattnall County, Georgia
Tattnall County is a county located in the southeast portion of the U.S. state of Georgia. As of the 2010 census, the population was 25,520. The county seat is Reidsville. Tattnall County was created on December 5, 1801, from part of Montgomery County, Georgia by the Georgia General Assembly. The county was named after Josiah Tattnall (1762–1803), a planter, soldier and politician. It is located within the Magnolia Midlands, a part of the Historic South region. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (1.8%) is water. Most of the western portion of Tattnall County, defined by a line running from Cobbtown south to Collins, then east to a point halfway to Bellville, and then south and southwest to the middle of the county's southern border, is located in the Ohoopee River sub-basin of the Altamaha River basin. The northeastern portion of the county, from Cobbtown to east of Reidsville, is located in the Cano ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawkinsville, Georgia
Hawkinsville is a city in and the county seat of Pulaski County, Georgia, United States. The population was 4,589 at the 2010 census. Hawkinsville is known as the "Harness Horse Capital" of Georgia. The Lawrence Bennett Harness Horse Racing facility is owned by the city and serves as an important training ground during winter months. The Harness Festival takes place every April at the end of training before horses head north for the harness racing season. History Hawkinsville was founded in 1830. In 1837, the seat of Pulaski County was transferred to Hawkinsville from Hartford. The community was named for Benjamin Hawkins, delegate to the Continental Congress, and the United States Indian Agent in the Southeast, appointed by President George Washington. The city includes Hawkinsville High School and several historical sites, including Hawkinsville City Hall-Auditorium, Hawkinsville Public School, the Merritt-Ragan House, the Pulaski County Courthouse, and Taylor Ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hollandale, Mississippi
Hollandale is a city in Washington County, Mississippi, United States. The population was 2,323 at the 2020 census. Deer Creek flows through Hollandale, and the Leroy Percy State Park is west of the city along Mississippi Highway 12. The Hollandale Municipal Airport is northeast of the city. A 2008 study by the University of North Carolina described Hollandale as "a small community that has been mired in poverty for decades." History Hollandale was named for Dr. Holland, the original owner of the town site. Hollandale was incorporated in 1890, and almost completely destroyed by fire in 1904. A one-room school house in Hollandale was founded by Emory Peter "E.P." Simmons in 1891. One of the first schools for African-American children in the area, it was used until 1923, when financial support from the Rosenwald Fund enabled the construction of a larger brick school. Simmons worked as an educator and administrator for 52 years, and Simmons High School in Hollandale is name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lewisville, Arkansas
Lewisville is a city in Lafayette County, Arkansas, United States. The population was 1,280 at the 2010 census. It is the county seat of Lafayette County. Geography Lewisville is located in northern Lafayette County at (33.360636, -93.579317). U.S. Route 82 passes through the south side of the city, leading east to Magnolia and west to Texarkana. Arkansas Highway 29 passes through the center of Lewisville, leading north to Hope and south to Bradley. According to the United States Census Bureau, Lewisville has a total area of , of which , or 1.58%, are water. Climate According to the Köppen Climate Classification system, Lewisville has a humid subtropical climate, abbreviated "Cfa" on climate maps.https://commons.wikimedia.org/wiki/File:K%C3%B6ppen_Climate_Types_Arkansas.png The hottest temperature recorded in Lewisville was on August 7 and 18, 2011, while the coldest temperature recorded was on February 16–17, 2021. Demographics 2020 census As of the 2020 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elephant Butte, New Mexico
Elephant Butte is a city in Sierra County, New Mexico, United States, located near Elephant Butte Reservoir and Elephant Butte Lake State Park. The population was 1,431 at the time of the 2010 census. History Elephant Butte was named from Elephant Butte, a butte nearby thought to resemble an elephant. Geography Elephant Butte is located at (33.189809, -107.222873). According to the United States Census Bureau, the city has a total area of , all land. Government As of January 2022 the current mayor of Elephant Butte is Phillip Mortensen while John Mascaro serves as city manager. Demographics At the 2010 census there were 1,431 people in 772 households, including 464 families, in the city. The population density was 477.0 people per square mile. There were 1,316 housing units at an average density of 438.7 per square mile. The racial makeup of the city was 92.2% White, 0.3% African American, 0.9% Native American, 0.5% Asian, 2.9% from other races, and 3.2% from two or mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Diego, California
San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States and the seat of San Diego County, the fifth most populous county in the United States, with 3,338,330 estimated residents as of 2019. The city is known for its mild year-round climate, natural deep-water harbor, extensive beaches and parks, long association with the United States Navy, and recent emergence as a healthcare and biotechnology development center. San Diego is the second largest city in the state of California, after Los Angeles. Historically home to the Kumeyaay people, San Diego is frequently referred to as the "Birthplace of California", as it was the first site visited and settled by Europeans on what is now the U.S. west coast. Upon landing in San Diego Bay in 1542, Juan Rodríguez Cabrillo claimed the are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gila River
The Gila River (; O'odham ima Keli Akimel or simply Akimel, Quechan: Haa Siʼil, Maricopa language: Xiil) is a tributary of the Colorado River flowing through New Mexico and Arizona in the United States. The river drains an arid watershed of nearly that lies mainly within the U.S., but also extends into northern Sonora, Mexico. Indigenous peoples have lived along the river for at least 2,000 years, establishing complex agricultural societies before European exploration of the region began in the 16th century. However, European Americans did not permanently settle the Gila River watershed until the mid-19th century. During the 20th century, human development of the Gila River watershed prompted the construction of large diversion and flood control structures on the river and its tributaries, and consequently the Gila now contributes only a small fraction of its historic flow to the Colorado. The historic natural discharge of the river is around , and is now only . These eng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Effective Radiated Power
Effective radiated power (ERP), synonymous with equivalent radiated power, is an IEEE standardized definition of directional radio frequency (RF) power, such as that emitted by a radio transmitter. It is the total power in watts that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity (signal strength or power flux density in watts per square meter) as the actual source antenna at a distant receiver located in the direction of the antenna's strongest beam ( main lobe). ERP measures the combination of the power emitted by the transmitter and the ability of the antenna to direct that power in a given direction. It is equal to the input power to the antenna multiplied by the gain of the antenna. It is used in electronics and telecommunications, particularly in broadcasting to quantify the apparent power of a broadcasting station experienced by listeners in its reception area. An alternate parameter that measures the same thing is ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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