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The scale of dBZ values can be seen along the bottom of the image. dBZ is a logarithmic dimensionless technical unit used in radar. It is mostly used in weather radar, to compare the equivalent reflectivity factor (Z) of a remote object (in mm 6 per m 3) to the return of a droplet of rain with a diameter of 1 mm (1 mm 6 per m 3). [1]
On 1 September 1876 the first Belgian weather forecast was edited, based on the analysis of a synoptic map. In April 1903, the first weather balloon was launched, in order to obtain meteorological observations at a higher altitude. On 31 July 1913 the meteorological service of the Observatory becomes an autonomous institute under the name of ...
JSC Vega Radio Engineering Corporation (Russian: АО «Концерн радиостроения «Вега», earlier CKB-17, NII-17, MNIIP) is a Russian company specializing in military radar and surveillance and C&C systems for ground-based, airborne and space systems like A-50, Almaz-1 and UAVs.
Thule Site J (J-Site) is a United States Space Force (USSF) radar station in Greenland near Pituffik Space Base for missile warning and spacecraft tracking.The northernmost station of the Solid State Phased Array Radar System, the military installation was built as the 1st site of the RCA 474L Ballistic Missile Early Warning System and had 5 of 12 BMEWS radars.
Today, EEC is the only commercial weather radar vendor in the US to offer a complete line of magnetron, klystron and solid-state transmitter weather radar systems. Additionally, EEC's TeleSpace business division offers direct readout ground station systems, which support the full constellation of both Geostationary Orbit and Polar Orbit weather ...
The Zaslon is a pulse-Doppler radar with a passive electronically scanned array (PESA) antenna and digital signal processing. The antenna used by the Zaslon is actually a multi-channel system comprising two separate electronically controlled arrays, an X band radar with 1700 emitters and a L band transponder with 64 emitters brought together into a single antenna. [4]
A simple calculation reveals that a radar echo will take approximately 10.8 μs to return from a target 1 statute mile away (counting from the leading edge of the transmitter pulse (T 0), (sometimes known as transmitter main bang)). For convenience, these figures may also be expressed as 1 nautical mile in 12.4 μs or 1 kilometre in 6.7 μs.
Assuming no terrain masking, the line-of-sight range of a single Kolchuga station (in km) is approximately: [1] = (() + ()) where hr(km) is the height of the radar in km, and ht(km) is the height of the target in kilometres, and assuming standard atmospheric radio refraction. Thus, for a Kolchuga at 100 m altitude (above local terrain) and a ...