FID (FID)

 
   Model format used with the FID software
COLUMNS         FMT             DESCRIPTION
OPTIONAL PRE-HEADER:
1-7             1X,F6.1        EQUATORIAL EARTH RADIUS
8-13            F6.1           FLATTENING FACTOR TO CONVERT FROM
                                  GEODETIC-GEOCENTRIC
HEADER1:
  1-  2         I2              MAXIMUM DEGREE AND ORDER OF CONSTANT TERMS
                                    OF FIELD MODEL
  3-  4         I2              MAXIMUM DEGREE AND ORDER OF FIRST ORDER TIME TERM
  5-  6         I2              MAXIMUM DEGREE AND ORDER OF SECOND ORDER TIME TERM
  7-  8         I2              MAXIMUM DEGREE AND ORDER OF THIRD ORDER TIME TERM
  9- 10         I2              =0, EXTERNAL FIELD SOLVED WITH MODEL
                                neq 0, EXTERNAL FIELD SOLVED WITH MODEL
 11- 12         I2              =0, FIELD MODEL COEFFICIENTS SCHMIDT NORMALIZED
                                neq 0, FIELD MODEL COEFFICIENTS GAUSS NORMALIZED
 13- 18         F6.1            EPOCH TIME FOR FIELD MODEL COEFFICIENTS
 19- 24         F6.1            MEAN RADIUS FOR FIELD MODEL POTENTIAL EXPANSION
 25- 26         I2              =0, NO INDUCED COEFFS SOLVED WITH MODEL
                                neq 0, INDUCED COEFFS SOLVED WITH MODEL
 27-76         12A4,A2          MODEL DESCRIPTION
HEADER2:
1-80           20A4             MODEL DESCRIPTION
MODEL:
  1-  3         I3              N
  4-  6         I3              M
  7- 17         F11.4           G
 18- 28         F11.4           H
 29- 39         F11.4           dG/dt
 40- 50         F11.4           dH/dt
 51- 61         F11.4           ddG/ddt
 62- 72         F11.4           ddH/ddt