======================================================= t1004.dat Number of records in file: 2941 Record 1: 1976 7 2 -- 5:20:00 obgrav = 79547.4 obmag = 0 cdm = 0 Record 2941: 1976 7 15 -- 16:30:00 obgrav = 79530.3 obmag = 0 cdm = 0 Min/Max observed gravity (milligals): 77491.9 80508.5