1985 May - J85
Further steps of the improved ILG J84 Database including a frequency list with a few details compiled by my the first computer with 160 kB Floppy. To save place and space times given in 6 hour blocks of 4-matrix: 1 = 00-06, 2 = 06-12, 3 = 12-18 and 4 = 18-24 UTC
1 to 1 (from a total of 1)