Updated on April 20, 2017 by Emma Unander

Compilation of basic technical specifications of the EISCAT facilities

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Location Tromsø Kiruna Sodankylä Longyearbyen Tromsø Heater
Band VHF UHF VHF VHF UHF HF
Transmitter frequencies 222.8 – 225.4 MHz 926.6 – 930.5 MHz 498.0 – 502.0 MHz 3.85 – 8.00 MHz
Transmitter 1

klystron

2 klystrons 16

klystrons

12 linear class AB tetrode valves
Peak power 1.6 MW 2 MW 1 MW 12×100 kW
Average power 200 kW 250 kW 250 kW 12×100 kW
Pulse duration 1 µs – 2.0 ms 1 µs – 2.0 ms 0.5 µs – 2.0 ms > 20 µs
Minimum interpulse 1.0 ms 1.0 ms 0.1 ms 20 µs
Phase coding Binary Binary Binary
Receiver frequencies 214.3-234.7 MHz 921.0-933.5 MHz 224.0-230.5 MHz 224.0-230.5 MHz 485.0-515.0 MHz
Receiver Analog Analog Analog Analog Analog
System temperature 250-350 K 90-110 K 100 K 100 K 65-80 K
Digital processing 14-bit 15 MHz ADC, digital conversion to baseband, 32-bit complex integer
Baseband channels 6 6 6 6 2 — 6
Antenna Four 30—40 m steerable parabolic cylinders 32 m steerable parabolic dish 32 m steerable parabolic dish 32 m steerable parabolic dish 42 m fixed and 32 m steerable parabolic dishes Three arrays of dipole antennas
Feed system Line feed, 128 crossed dipoles Cassegrain Crossed dipole Crossed dipole Cassegrain
Gain 46 dBi 48.1 dBi 48.1 dBi or 50 dBi 48.1 dBi or 50 dBi 44.8 dBi or 42.5 dBi 24 dBi or 30 dBi
Polarisation Circular Circular Any Any Circular

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