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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: acq_pot.c 20511 2009-09-28 15:00:43Z carrie $ SwRI" #include "libbase_idfs.h" #include "ret_codes.h" /******************************************************************************* * * * IR_ACQUIRE_POTENTIAL_DATA SUBROUTINE * * * * DESCRIPTION * * This routine is called to acquire data for the spacecraft potential. * * The data will either need to be read or the previous sample will hold for * * the current delta-t processing. If a header change is encountered, there * * is the need to check the sizes of arrays in the idf_data structure. Data * * is acquired for one element of the sweep. * * * * INPUT VARIABLES * * struct time_span structure that holds the time period for * * src_time the current delta-t being processed * * struct potential_info a pointer to the structure that holds space-* * *potential_ptr craft potential information * * SDDAS_USHORT swp_step current step of the sweep being processed * * SDDAS_CHAR same_times flag indicating if the same time range is * * applicable to all steps of the vector * * * * USAGE * * x = ir_acquire_potential_data (src_time, potential_ptr, swp_step, * * same_times) * * * * NECESSARY SUBPROGRAMS * * read_drec() the universal read routine that retrieves * * the data for the time sample being processed* * ir_check_idf_data_memory () makes sure that all allocated arrays in the * * idf_data structure are of sufficient size * * ir_process_potential_data() processes data for the spacecraft potential * * ir_ancillary_data_los_next_file() handles the case when an LOS_STATUS or * * NEXT_FILE_STATUS is encountered * * * * EXTERNAL VARIABLES * * None * * * * INTERNAL VARIABLES * * struct idf_data *POTENTIAL_DATA structure holding data for the space- * * craft potential being processed * * register SDDAS_DOUBLE *dptr pointer to data * * register SDDAS_FLOAT *fptr pointer to the normalization factors * * SDDAS_SHORT ret_val the value returned by the called routine * * SDDAS_SHORT read_code status code returned from READ_DREC() * * SDDAS_CHAR full_swp flag that indicates if 1 value is being * * requested or all values for the record * * SDDAS_CHAR data_adv time advancement flag * * SDDAS_CHAR *sptr ptr to step status indicators * * char more_data terminate processing of data flag * * * * SUBSYSTEM * * Display Level * * * ******************************************************************************/ SDDAS_SHORT ir_acquire_potential_data (struct time_span src_time, struct potential_info *potential_ptr, SDDAS_USHORT swp_step, SDDAS_CHAR same_times) { struct idf_data *POTENTIAL_DATA; register SDDAS_DOUBLE *dptr; register SDDAS_FLOAT *fptr; SDDAS_SHORT ret_val, read_code; SDDAS_CHAR full_swp = 0, data_adv = 1, *sptr; char more_data = 1; /***************************************************************************/ /* Retrieve data so that the current sample of the sweep can be processed.*/ /***************************************************************************/ while (more_data) { /********************************************************************/ /* If the times of each step are the same, then simply copy the */ /* value computed for step 0. (due to file pointer manipulation). */ /********************************************************************/ if (same_times && swp_step != 0) { /***************************************************************************/ /* Copy the values from element zero to the current step being processed. */ /***************************************************************************/ dptr = potential_ptr->data_val + swp_step; fptr = potential_ptr->time_frac + swp_step; sptr = potential_ptr->step_status + swp_step; *dptr = *potential_ptr->data_val; *fptr = *potential_ptr->time_frac; *sptr = *potential_ptr->step_status; more_data = 0; continue; } /*********************************************************************/ /* Has the entire time delta been processed for this component? */ /*********************************************************************/ if (!potential_ptr->all_done) { /******************************************************************/ /* Does the next data sample need to be read from the data file? */ /******************************************************************/ if (potential_ptr->next_data) { read_code = read_drec (potential_ptr->data_key, potential_ptr->exten, potential_ptr->version, potential_ptr->idf_data_ptr, potential_ptr->sensor, data_adv, full_swp); /***************************************************************/ /* If an error was encountered, return to the calling routine.*/ /***************************************************************/ if (read_code < 0) return (read_code); /***************************************************************/ /* Save the time of this sweep. */ /***************************************************************/ POTENTIAL_DATA = (struct idf_data *) potential_ptr->idf_data_ptr; potential_ptr->last_swp.byear = POTENTIAL_DATA->byear; potential_ptr->last_swp.bday = POTENTIAL_DATA->bday; potential_ptr->last_swp.bmilli = POTENTIAL_DATA->bmilli; potential_ptr->last_swp.bnano = POTENTIAL_DATA->bnano; potential_ptr->last_swp.eyear = POTENTIAL_DATA->eyear; potential_ptr->last_swp.eday = POTENTIAL_DATA->eday; potential_ptr->last_swp.emilli = POTENTIAL_DATA->emilli; potential_ptr->last_swp.enano = POTENTIAL_DATA->enano; /*************************************************************/ /* Need to check the sizes of arrays in the idf_data */ /* structure since header changed. */ /*************************************************************/ if (POTENTIAL_DATA->hdr_change) { ret_val = ir_check_idf_data_memory (potential_ptr->data_key, potential_ptr->exten, potential_ptr->version, potential_ptr->idf_data_ptr); if (ret_val != ALL_OKAY) return (ret_val); } /***************************************************************/ /* Process the data just read. */ /***************************************************************/ ret_val = ir_process_potential_data (potential_ptr, src_time, swp_step); if (ret_val != ALL_OKAY) return (ret_val); /***************************************************************/ /* Handle file crossing condition. */ /***************************************************************/ if (read_code == LOS_STATUS || read_code == NEXT_FILE_STATUS) { ret_val = ir_ancillary_data_los_next_file (potential_ptr->data_key, potential_ptr->exten, potential_ptr->version, potential_ptr->idf_data_ptr, src_time, potential_ptr->stop_year, potential_ptr->stop_day, potential_ptr->stop_sec, potential_ptr->stop_nano, POTENTIAL_FLAG, &potential_ptr->file_status); if (ret_val != ALL_OKAY) return (ret_val); } } /******************************************************************/ /* The existing data is utilized for current delta-t processing. */ /******************************************************************/ else { ret_val = ir_process_potential_data (potential_ptr, src_time, swp_step); if (ret_val != ALL_OKAY) return (ret_val); } } /******************************************************************/ /* Once the data has been acquired, the spacecraft potential can */ /* be computed. */ /******************************************************************/ if (potential_ptr->all_done) more_data = 0; } /**********************************************************************/ /* Normalize the data. */ /**********************************************************************/ fptr = potential_ptr->time_frac + swp_step; dptr = potential_ptr->data_val + swp_step; if (*fptr > 0.0) *dptr /= *fptr; /************************************************************************/ /* Reset the flag for each component to process the next delta-t. */ /************************************************************************/ potential_ptr->all_done = 0; return (ALL_OKAY); }