# Technical data of EISCAT locations

The EISCAT Headquarters is situated in Kiruna. Our radar facilities are situated in three different countries; Finland, Norway and Sweden.

The mainland system: the EISCAT UHF-system that consists of four radars is situated outside Kiruna, Sweden with one receptor, one receptor is situated in Sodankylä, Finland and one receptor and transmitter are placed in Tromsø, Norway. The other mainland facility: the EISCAT VHF in Tromsø, Norway. And then we are operating the EISCAT Svalbard Radar (ESR) in Spitzbergen, Svalbard. See an illustration of the locations.

This is the coordinates of the EISCAT facilities in various geographical and geomagnetic coordinate systems. The geographic positions are generally based on a satellite survey from 1981 and agreed with the positions used inside EROS. The Tromsø geographic position comes from a later GPS measurement while the Longyearbyen latitude and longitude come from a measurement with a hand held GPS. The geomagnetic values are calculated for 1 January, 2010, using the DGRF/IGRF model. The values were retrieved 5 February, 2010.

Location |
Tromsø |
Kiruna |
Sodankylä |
Longyearbyen |

Geographic latitude | 69°35′ N (69.58°) | 67°52′ N (67.87°) | 67°22′ N (67.37°) | 78°09′ N (78.15°) |

Geographic longitude | 19°14′ E (19.23°) | 20°26′ E (20.43°) | 26°38′ E (26.63°) | 16°01′ E (16.02°) |

Altitude | 86 m | 418 m | 197 m | 445 m |

Corrected geomagnetic latitude | 66.73° | 64.89° | 64.14° | 75.43° |

Corrected geomagnetic longitude | 102.18° | 101.87° | 106.59° | 110.68° |

L-shell value (ground) | 6.45 | 5.55 | 5.26 | 15.81 |

L-shell value (300 km) | 6.70 | 5.81 | 5.48 | – |

Typical values of the geomagnetic field:

Location |
Tromsø |
Kiruna |
Sodankylä |
Longyearbyen |

Dip angle (ground) | 78.24° | 77.43° | 77.39° | 82.23° |

Dip angle (300 km) | 78.19° | 77.34° | 77.29° | 82.35° |

Declination (ground) | 7.12° | 7.45° | 10.68° | 6.41° |

Declination (300 km) | 5.49° | 5.88° | 8.73° | 4.05° |

B-field north (ground) | 10.74 µT | 11.40 µT | 11.40 µT | 7.33 µT |

B-field north (300 km) | 9.56 µT | 10.18 µT | 10.20 µT | 6.41 µT |

B-field east (ground) | 1.34 µT | 1.49 µT | 2.15 µT | 0.82 µT |

B-field east (300 km) | 0.92 µT | 1.05 µT | 1.57 µT | 0.45 µT |

B-field down (ground) | 51.96 µT | 51.58 µT | 51.88 µT | 54.05 µT |

B-field down (300 km) | 45.95 µT | 45.55 µT | 45.77 µT | 47.88 µT |

B-field hor. (ground) | 10.82 µT | 11.50 µT | 11.60 µT | 7.38 µT |

B-field hor. (300 km) | 9.61 µT | 10.23 µT | 10.32 µT | 6.43 µT |

B-field abs. (ground) | 53.10 µT | 52.84 µT | 53.16 µT | 54.56 µT |

B-field abs. (300 km) | 46.95 µT | 46.69 µT | 46.92 µT | 48.31 µT |