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GridIntegrate

Syntax
void GridIntegrate(struct GridData *a,struct GridData *b,double *err);
Header
superdarn/griddata.h
Library
grid
Description

The GridIntegrate function integrates gridded data so that only one vector per site is stored in a grid cell.

The integrated grid data is stored in the structure pointed to by the argument a. The gridded data to integrate is taken from the structure pointed to by the argument b.

The argument err is a pointer an array containing the lowest acceptable values for the errors in power, velocity and spectral width. If a cell has an error lower than these values it is replaced by the threshold value.

Returns
None
Errors
None
Example

Source Code: GridIntegrate.c

/* GridIntegrate.c
   ===============
   Author: R.J.Barnes

Copyright (c) 2012 The Johns Hopkins University/Applied Physics Laboratory

This file is part of the Radar Software Toolkit (RST).

RST is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.

Modifications:


*/


#include <stdio.h>
#include <stdlib.h>

#include "rtypes.h"
#include "rtime.h"
#include "dmap.h"
#include "limit.h"
#include "griddata.h"
#include "gridread.h"
#include "gridwrite.h"


struct GridData grd;
struct GridData ogrd;
struct GridData igrd;

int main(int argc,char *argv[]) {
 
  FILE *fp;

  double err[3]={100,0.1,10};
  int num=0;


  int yr,mo,dy,hr,mt;
  double sc;

  fp=fopen(argv[1],"r");

  if (fp==NULL) {
    fprintf(stderr,"File not found.'n");
    exit(-1);
  }

  while(GridFread(fp,&grd) !=-1) {

    TimeEpochToYMDHMS(grd.st_time,&yr,&mo,&dy,&hr,&mt,&sc);
    fprintf(stderr,"%.4d-%.2d-%.2d %.2d:%.2d:%.2d pnts=%d'n",
            yr,mo,dy,hr,mt,(int) sc,grd.vcnum);

   if (num==0) GridCopy(&ogrd,&grd);
   else GridAdd(&ogrd,&grd,num);
   num++;
   if (num==10) {
     GridAdd(&ogrd,NULL,num);
     ogrd.ed_time=grd.ed_time;
     GridIntegrate(&igrd,&ogrd,err);
     GridFwrite(stdout,&igrd);
     num=0;
   }    
  }
 
  fclose(fp);


  return 0;
}