Rjplt

Set of routines to read a standard Goddard Trajectory Determination System orbit file. (See Section 5.4 for contents of the file.)

Set of routines to read a standard Goddard Trajectory Determination System ephemeris tape. (See Section 5.4 for contents of the tape.)

Routine to obtain positions of the Sun, the Moon, and the first seven planets from a direct access file (SLP file, Section 5.5) containing polynomial coefficients derived from the standard Jet Propulsion Laboratory planetary ephemeris tape. The routine's accuracy is comparable to that of die Jet Propulsion Laboratory tape. (See Section 5.5.)

Routine to read a standard Jet Propulsion Laboratory planetary ephemeris tape to obtain positions of the Sun and the Moon. (See Section 5.5.)

20.3.4 Plotting Routines

Routine Function

GRAPH,

SCALE General printer plot package. Generates a Cartesian plot of any set of data on a line printer, with scaling performed automatically. Plot covers up to 80 lines, with up to 132 characters per line. A sample plot is shown in Fig. 20-3.

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