Japanese Aeromagnetic Surveys of the islands and surrounding
oceans for 1980 (1975 and 1985 are in the Surface Survey dataset)
CD: SURVEYAERO2
Files: /su2400/su2400.001 - 4
Format: JAPA
Japanese Survey data processed with AVSIG
Data distribution is shown in Figure 7.6
CD: SURVEYPROC1
Files: /aero/su2602.f01
Format: ASC