Geographical and geomagnetic positions of the EISCAT facilities

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 recent measurement with a hand held GPS.

The geomagnetic values are calculated for 1 January, 1984 using the IRGF1980 model. 

                                Tromsø       Kiruna       Sodankylä     Longyearbyen


Geographic

Latitude  (deg)                 69.5847      67.86066     67.36369         78.153
          (rad)                  1.21448      1.184392     1.175718
Longitude (deg)                 19.2194      20.43522     26.62707         16.029
          (rad)                  0.33544      0.356662     0.464730
Altitude    (m)                 86.28       417.62       197.03           438

Geomagnetic

Corr.geom.lat.                  66.107       64.279       63.424
Corr.geom.long.                103.366      102.846      107.249

Invariant Latitude
  ground  (deg)                 66.260       64.448       63.568           75.18
          (rad)                  1.156        1.125        1.109  
  300km   (deg)                 66.795       65.028       64.149
          (rad)                  1.166        1.135        1.120

Dip angle
  ground  (deg)                 77.616       76.793       76.717           82.06
          (rad)                  1.355        1.340        1.339
  300km   (deg)                 77.588       76.721       76.631
          (rad)                  1.354        1.339        1.337

Declination
  ground  (deg)                  3.376        3.958        7.440
          (rad)                  0.059        0.069        0.130
  300km   (deg)                  1.596        2.261        5.406
          (rad)                  0.028        0.039        0.094

L-shell value
  ground                         6.170        5.375        5.047
  300km                          6.441        5.611        5.260

B-field (N)
  ground                         0.113        0.120        0.120
  300km                          0.100        0.107        0.107

B-field (E)
  ground                         0.007        0.008        0.016
  300km                          0.003        0.004        0.010

B-filed (down)
  ground                         0.515        0.511        0.514
  300km                          0.456        0.452        0.454

B-fiels (abs)
  ground                         0.528        0.525        0.528
  300km                          0.467        0.464        0.466
This page was formerly page D.1 of the old Users' Guide

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Updated by Tony,