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In fluid dynamics, dynamic pressure (denoted by q or Q and sometimes called velocity pressure) is the quantity defined by: [1] = where (in SI units): q is the dynamic pressure in pascals (i.e., N/m 2, ρ (Greek letter rho) is the fluid mass density (e.g. in kg/m 3), and; u is the flow speed in m/s.
The magnitude of the shift is a function of the wavelength of the signal and the angular velocity of the antenna: S = r W / λ Where S is the Doppler shift in frequency (Hz), r is the radius of the circle, W is the angular velocity in radians per second, λ is the target wavelength and c is the speed of light in meters per second. [13]
The COMAP receiver is installed on one of the 10-meter telescopes of the former millimeter array. KuPol, or Ku-band Polarimeter, is an instrument that was installed on the OVRO 40 meter Telescope in 2007 and is used to monitor blazars. [4] The Expanded Owens Valley Solar Array (EOVSA) is a solar radio telescope array currently in operation at ...
Much of the site is devoted to the enormous overhead wire antenna array that is necessary to efficiently radiate the VLF waves. The antenna, shown above, consists of ten catenary cables, 5,640–8,700 ft (1,719–2,652 m, 1.1–1.6 miles) long, suspended in a zigzag pattern over the valley between Wheeler mountain and Blue mountain on twelve 200 ft. towers on the mountains' crests.
A radiosonde is an automatic radio transmitter in the meteorological aids service usually carried on an aircraft, free balloon, kite or parachute, and which transmits meteorological data. Each radio transmitter shall be classified by the radiocommunication service in which it operates permanently or temporarily.
The most basic radio-navigational aid used in aviation is the non-directional beacon or NDB. It is a simple low- and medium-frequency transmitter used to locate airway intersections and airports and to conduct instrument approaches, with the use of a radio direction finder located on the aircraft.
Inaugurated in 1972, for 29 years the Effelsberg Radio Telescope was the largest fully steerable radio telescope on Earth, surpassing the Lovell Telescope in the UK. [1] In 2000, it was surpassed by the Green Bank Observatory 's Robert C. Byrd Green Bank Telescope in Green Bank , US, which has a slightly larger elliptical 100 by 110-metre aperture.
The Frontier Radio Lite is the smaller version of its sibling, the Frontier Radio, fitting all of its systems onto a single card. Originally an S-band radio, FR Lite was the first in the family to be reprogrammable, and is designed for missions with high risk tolerance and quick schedules.