Source Code to C header file ipfindex.h

/*	Raw data for ert, scet, and rct in the IPFs consiststs of	*
 *	a two-byte integer (variable name like doy58) with number 	*
 *	of days since 1958 Jan 1 (typical value > 38*365 = 13870 and a 	*
 *	four-byte integer (variable name like msod) with the number of 	*
 *	milliseconds of the current day (max value 86.4e6 ~ 27 bits)	*
 *	Raw data for spacecraft clock consists of rim counter and	*
 *	mod 91 count within rim, plus less significant variables	*
 *	which should never be of interest.				*/



struct time	{	   /* time variables for GMT style times	*/
	double	fldoy;		/*  day of current year			*/
	double	flmsod;		/*  second of current day		*/
	double	flsod;		/*  second of current day		*/
        double	flsom;		/*  second of current minute		*/
        long	inmsod;		/*  millisecond of day			*/
        long	insod;		/*  second of day			*/
	int	yr;		/*  year - 1900, between 89 and 100	*/
	int	inhod;		/*  hour of current day			*/
	int	inmoh, insom;	/*  minute of hour, second of minute	*/
	int	doy58, doy;	/*  day of year -- 1958 or current	*/
		};
struct sclk	{	   /* clock variables for s/c clock		*/
	long	rim;		/* 24-bit rim counter			*/
	long	sk;		/* total elapsed minor frames		*/
	int	m91;		/* minor frames of current rim		*/
			   /* 91 minor frames per rim			*
			    * 2/3 seconds per minor frame		*/
		};