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SwRI can revise these Terms at any time * without notice by updating this posting. * * Trademarks * * The SwRI logo is a trademark of SwRI in the United States and other countries. * */ #ident "@(#) $Id: spin_period_exceeded.c 20519 2009-09-28 16:58:31Z carrie $ SwRI" #include "libbase_idfs.h" /******************************************************************************* * * * IR_SPIN_PERIOD_EXCEEDED SUBROUTINE * * * * DESCRIPTION * * This routine is called to determine if the start time for the current * * sweep exceeds the end time for the current spin being processed. This is * * necessary because of cases where there is a data gap and the azimuthal * * cross over angle is not located between the last sweep processed and the * * current sweep. * * * * INPUT VARIABLES * * void *first_data_ptr ptr to the memory location for the structure * * that holds returned data values (first sweep) * * void *data_ptr ptr to the memory location for the structure * * that holds returned data values (current sweep) * * SDDAS_LONG spin_duration the spin period in milliseconds * * * * USAGE * * x = ir_spin_period_exceeded (&first_data_ptr, &data_ptr, spin_duration) * * * * NECESSARY SUBPROGRAMS * * adjust_time () corrects time elements if too many seconds * * (day crossing) or too many days (year xing) * * * * EXTERNAL VARIABLES * * None * * * * INTERNAL VARIABLES * * struct idf_data structure holding all of the currently * * *EXP_DATA returned data values to be processed * * SDDAS_LONG new_btime_ms start time of measurement in milliseconds * * SDDAS_SHORT new_year, new_day year/ day time values for spin duration * * * * SUBSYSTEM * * Display Level * * * ******************************************************************************/ SDDAS_CHAR ir_spin_period_exceeded (void *first_data_ptr, void *data_ptr, SDDAS_LONG spin_duration) { struct idf_data *EXP_DATA; SDDAS_LONG new_btime_ms; SDDAS_SHORT new_year, new_day; /**************************************************************************/ /* Make sure time did not go past anticipate spin duration. This is */ /* necessary because a large time gap could have been encountered and */ /* since the code is simply checking angle, could have incorrect */ /* combination of data from different spins. */ /**************************************************************************/ EXP_DATA = (struct idf_data *) first_data_ptr; new_year = EXP_DATA->byear; new_day = EXP_DATA->bday; new_btime_ms = EXP_DATA->bmilli + spin_duration; adjust_time (&new_year, &new_day, &new_btime_ms, 2); /***********************************************************************/ /* Check the year time component. Use this order of IF ELSE_IF for */ /* year and day to try to cut down on the number of conditional tests.*/ /***********************************************************************/ EXP_DATA = (struct idf_data *) data_ptr; if (EXP_DATA->byear == new_year) { /***********************************************************************/ /* Check other time components besides year. */ /***********************************************************************/ if (EXP_DATA->bday == new_day) { /********************************************************************/ /* Greater millseconds of the day value? Data is in future spin. */ /********************************************************************/ if (EXP_DATA->bmilli > new_btime_ms) return (1); } /**********************************************************************/ /* Greater day value? Data is in future spin. */ /**********************************************************************/ else if (EXP_DATA->bday > new_day) return (1); } /**********************************************************************/ /* Greater year value? Data is in future spin. */ /**********************************************************************/ else if (EXP_DATA->byear > new_year) return (1); return (0); }