| Little Signal Hills | |
|---|---|
  Little Signal Hills Location of Little Signal Hills in California [1]  Little Signal Hills Little Signal Hills (the United States) | |
| Highest point | |
| Elevation | 413 m (1,355 ft) |
| Geography | |
| Country | United States |
| State | California |
| District | Kern County |
| Range coordinates | 35°5′34.886″N119°26′32.428″W / 35.09302389°N 119.44234111°W |
| Topo map | USGS Maricopa |
The Little Signal Hills are a low mountain range in the Transverse Ranges, in southeastern Kern County, California. [1]
Radar is a system that uses radio waves to determine the distance (ranging), direction, and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.
Signal Hill is a city 2.2 sq mi (5.7 km2) in area in Los Angeles County, California. Located high on a hill, the city is an enclave completely surrounded by the city of Long Beach. Signal Hill was incorporated on April 22, 1924, roughly three years after oil was discovered there. As of the 2010 census, the city population was 11,016.
Medium wave (MW) is a part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broadcast band. During the daytime, reception is usually limited to more local stations, though this is dependent on the signal conditions and quality of radio receiver used. Improved signal propagation at night allows the reception of much longer distance signals. This can cause increased interference because on most channels multiple transmitters operate simultaneously worldwide. In addition, amplitude modulation (AM) is often more prone to interference by various electronic devices, especially power supplies and computers. Strong transmitters cover larger areas than on the FM broadcast band but require more energy and longer antennas. Digital modes are possible but have not reached momentum yet.
Tropospheric scatter, also known as troposcatter, is a method of communicating with microwave radio signals over considerable distances – often up to 500 kilometres (310 mi) and further depending on frequency of operation, equipment type, terrain, and climate factors. This method of propagation uses the tropospheric scatter phenomenon, where radio waves at UHF and SHF frequencies are randomly scattered as they pass through the upper layers of the troposphere. Radio signals are transmitted in a narrow beam aimed just above the horizon in the direction of the receiver station. As the signals pass through the troposphere, some of the energy is scattered back toward the Earth, allowing the receiver station to pick up the signal.
The Black Rock Desert is a semi-arid region of lava beds and playa, or alkali flats, situated in the Black Rock Desert–High Rock Canyon Emigrant Trails National Conservation Area, a silt playa 100 miles (160 km) north of Reno, Nevada, that encompasses more than 300,000 acres (120,000 ha) of land and contains more than 120 miles (200 km) of historic trails. It is in the northern Nevada section of the Great Basin with a lakebed that is a dry remnant of Pleistocene Lake Lahontan.
KKAP is a religious television station in Little Rock, Arkansas, United States, part of the Daystar Television Network. The station is owned and operated by the Community Television Educators subsidiary of Daystar holding company Word of God Fellowship, Inc. KKAP's studios are located on Shackelford Drive in the Beverly Hills section of Little Rock, and its transmitter is located on Shinall Mountain, near the Chenal Valley neighborhood of Little Rock.
In electronics, biasing is the setting of DC operating conditions of an electronic component that processes time-varying signals. Many electronic devices, such as diodes, transistors and vacuum tubes, whose function is processing time-varying (AC) signals, also require a steady (DC) current or voltage at their terminals to operate correctly. This current or voltage is called bias. The AC signal applied to them is superposed on this DC bias current or voltage.
The Little River is a 4.9-mile-long (7.9 km) river located in central New Hampshire in the United States. Its outflow travels via the Big River, Suncook River, and Merrimack River to the Gulf of Maine, an arm of the Atlantic Ocean.
The Craighill Channel Lower Range Front Light, named for William Price Craighill, was the first caisson lighthouse built in the Chesapeake Bay in Maryland, USA. First lit in 1873, the range marks the first leg of the maintained Craighill Channel from the Chesapeake Bay at the mouth of the Patapsco River into the Baltimore harbor and works in conjunction with the Craighill Channel Lower Range Rear Light. It was owned by non-profit organization Historical Place Preservation, Inc. from 2005 until the government took back the property in 2017 due to neglect. The lighthouse was put up for auction and sold to the highest bidder on September 15 2017 for $95,000.
St. Martin Island Light is an exoskeleton lighthouse on St. Martin Island. It marks one of four passages between Lake Michigan and the bay of Green Bay. Constructed in 1905, this light tower is the only example in the US of a pure exoskeletal tower on the Great Lakes. Similar designs exist in Canada. Painted white, the hexagonal tower is made of iron plates which are supported by six exterior steel posts that have latticed buttresses.
Laramie Peak Is the highest and most prominent peak in the Laramie Range of Wyoming. With a peak elevation of 10,275 feet (3,132 m), it is the only peak in the Laramie Range to exceed an elevation of 10,000 feet (3,000 m). It can be seen from great distances from both sides of the Laramie Range including from around 100 miles (160 km) away at the top of the Scotts Bluff National Monument in Nebraska and in the Wyoming towns of Wheatland, Douglas, Rock River, and immediately outside the cities of Laramie and Cheyenne.
Hyde Glacier is a short glacier flowing east through the Edson Hills to join Union Glacier, in the Heritage Range, Antarctica. It was mapped by the United States Geological Survey from surveys and U.S. Navy air photos, 1961–66, and was named by the Advisory Committee on Antarctic Names for William H. Hyde, an ionospheric scientist at Little America V Station in 1958.
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| Other | |
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