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Radioglaciology is the study of glaciers, ice sheets, ice caps and icy moons using ice penetrating radar.It employs a geophysical method similar to ground-penetrating radar and typically operates at frequencies in the MF, HF, VHF and UHF portions of the radio spectrum.
Daytona Beach International Airport Surveillance Radar. An airport surveillance radar (ASR) is a radar system used at airports to detect and display the presence and position of aircraft in the terminal area, the airspace around airports. It is the main air traffic control system for the airspace around airports. At large airports it typically ...
However, the trade-off of this is that slow edges make range resolution poor. Early radars limited the bandwidth through filtration in the transmit chain, e.g. the waveguide, scanner etc., but performance could be sporadic with unwanted signals breaking through at remote frequencies and the edges of the recovered pulse being indeterminate.
An airport surveillance radar display. A radar display is an electronic device that presents radar data to the operator. The radar system transmits pulses or continuous waves of electromagnetic radiation, a small portion of which backscatter off targets (intended or otherwise) and return to the radar system.
General purpose radars are increasingly being substituted for pure navigational radars. These generally use navigational radar frequencies, but modulate the pulse so the receiver can determine the type of surface of the reflector. The best general-purpose radars distinguish the rain of heavy storms, as well as land and vehicles.
At present, automated airport weather stations are unable to report a variety of meteorological conditions. These include: shallow or patchy fog; blowing dust; smoke; falling ash; volcanic eruptions; tornadoes; precipitation that is not in the form of rain or snow, such as hail, ice pellets and snow grains; multiple forms of precipitation ...
All ARSR-1/2s were replaced by Common ARSR by the end of 2015. CARSR has a 200-nautical-mile (370 km; 230 mi) range, and shares transmitter components and software with the FAA's new airport surveillance radar, the ASR-11. Like the ASR-11, CARSR is completely solid state. Westinghouse built ARSR-3.
Common traffic advisory frequency (CTAF) is the name given to the VHF radio frequency used for air-to-air communication at United States, and Australian non-towered airports. Many towered airports close their towers overnight, keeping the airport open for cargo operations and other activity.