COLUMNS FMT DESCRIPTION 1- 4 I*4 ZERO FILL 5- 8 I*4 MODIFIED JULIAN DAY OF FIRST DATA VALUE 9- 12 I*4 MILLISECONDS OF DAY OF FIRST DATA VALUE 13- 16 R*4 TIME INCREMENT BETWEEN OBSERVATIONS (MSEC) 17- 20 R*4 REFERENCE TIME OF COORDINATE SYSTEM FOR GHA 21- 24 R*4 GREENWICH HOUR ANGLE (GHA) AT EPOCH (Radians) 25-536 (128)R*4 POSITION VECTOR X (KM) 537-1048 (128)R*4 POSITION VECTOR Y (KM) 1049-1560 (128)R*4 POSITION VECTOR Z (KM) 1561-2072 (128)R*4 INVARIANT LATITUDE (deg) 2073-2584 (128)R*4 GEOMAGNETIC TIME (Hours) 2585-3096 (128)R*4 DIP LATITUDE (deg)