COLUMNS FMT DESCRIPTION 1- 4 R*4 MODIFIED JULIAN DAY OF FIRST DATA VALUE 5- 8 R*4 SECONDS OF DAY OF FIRST DATA VALUE 9- 12 R*4 APPARENT SIDEREAL TIME (Radians) 13- 16 R*4 REFERENCE DATE OF COORDINATE SYSTEM 17-1616 (400)R*4 POSITION VECTOR X 1617-3216 (400)R*4 POSITION VECTOR Y 3217-4816 (400)R*4 POSITION VECTOR Z 4817-6416 (400)R*4 MCILWAIN'S L-PARAMETER 6417-8016 (400)R*4 GEOMAGNETIC TIME 8017-9616 (400)R*4 DIPOLE LATITUDE