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EISCAT's VHF radar is a monostatic system at Tromsø in Norway, which has a central frequency of 224 MHz. The VHF transmitter is housed in the same building as the UHF transmitter and the two transmitters share the same capacitor bank. The VHF antenna is a cylindrical paraboloid of dimension 40 x 120 metres, in four sections. It is steerable only in elevation, though a certain amount of azimuthal coverage is possible using phasing cables. The antenna can be configured in two ways. In one mode the total collecting area of the dish can be used as a single receiver. In the other mode, the dish can be split into two halves to allow transmission and reception of two independent beams. The receivers are essentially the same as those used for the UHF radar. The VHF system has been operating since 1985. In 2001, it underwent a major upgrade of the receiver hardware. There has also been a continuous improvement and development of its experimental capabilities.
Technical Information
Technical information about the hardware of the VHF radar antenna.
Real-time raw data from the VHF radar system
Raw data displays from the VHF transmitter/receiver at Tromsø.
Latest Analysis from Tromsø VHF
Most recent available analysed data from the VHF system at Tromsø.
Pictures of the VHF dish
A selection of pictures of the VHF system at Tromsø.
Sky Noise for the EISCAT VHF
Plot produced by Phil Williams, representing the sky noise at 224 MHz as a function of siderial time and declination.