Table 1

List of selected ground-based ionosondes.

Geographic latitude Geographic longitude Geomagnetic latitude
American sector
 Pt. Arguello 34.8 239.5 42.3
 Austin 30.4 262.3 39.7
 Eglin 30.5 273.5 41.1
 Wallops Island 37.9 284.5 49.2
 Ramey 18.5 292.9 29.8
 Boa Vista 2.8 299.3 11.4
 Belem 1.4 311.6 6.9
 Sao Luis −2.6 315.8 6.9
 Fortaleza −3.9 321.6 5.9
 Jicamarca −12.0 283.2 0.7
 Cachoeira Paulista −22.7 315.0 −13.6
Europe-African sector
 Rome 41.9 12.5 42.3
 Athens 38.0 23.5 36.4
 El Arenosillo 37.1 353.3 41.4
 Nicosia 35.0 33.2 31.7
 Ascension Island −7.9 345.6 −6.6
 Grahamstown −33.3 26.5 −33.9
 Hermanus −34.4 19.2 −33.6
Asian-Pacific sector
 Kokubunji 35.7 139.5 25.7
 Okinawa 26.7 128.2 15.5
 Wake 19.3 166.7 13.7
 Guam 13.6 144.9 4.2
 Cocos Island −12.2 96.8 −23.2
 Darwin −12.5 130.9 −22.9
 Learmonth −21.8 114.0 −33.0
 Brisbane −27.1 153.1 −35.4
 Norfolk −29.0 168.0 −34.5
 Niue −19.1 190.1 −21.2
 Lualualei 21.4 201.8 20.0

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