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tester.c
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tester.c
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/* tester.c: Testing routine for CXFORM
**
** 2004/11/25 Ryan Boller: Initial version - ugly, but functional
*/
/*
** Required data format from SSCWeb is as follows:
**
Time GEI (RE) GEI/J2000 (RE) GEO (RE) GM (RE) GSE (RE) GSM (RE) SM (RE)
yy/mm/dd hh:mm:ss X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z
00/07/18 00:00:00 7.68129 1.67608 5.01664 7.68176 1.67515 5.01623 1.87559 7.63503 5.01664 -7.45039 4.18915 3.73107 -0.14490 -8.45372 3.93597 -0.14490 -8.44147 3.96216 -1.34120 -8.44147 3.73107
00/07/18 00:03:00 7.66237 1.67695 5.05177 7.66284 1.67601 5.05137 1.96631 7.59326 5.05177 -7.38960 4.26207 3.77797 -0.12368 -8.44306 3.96787 -0.12368 -8.42716 4.00152 -1.32455 -8.42716 3.77797
00/07/18 00:06:00 7.64297 1.67771 5.08660 7.64345 1.67678 5.08619 2.05615 7.54997 5.08660 -7.32761 4.33364 3.82477 -0.10246 -8.43188 3.99951 -0.10246 -8.41214 4.04086 -1.30773 -8.41214 3.82477
...
**
** http://sscweb.gsfc.nasa.gov/cgi-bin/sscweb/Locator.cgi
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include "cxform.h"
#define NLINES 50 /* Number of lines to read from data file */
#define NSYSTEMS 7 /* Number of coordinate systems included in data file */
int main()
{
/* Misc variables */
int retVal, i, j, srcSystemIndex;
char srcSystem[3];
double jd;
Vec v_in, v_out;
FILE *filePtr, *filePtrOut;
float avgPctDiff[3], avgAbsDiff[3];
/* data variables */
char fname[] = "test_ssc_data.dat";
char fname_out[] = "test_results.txt";
int years[NLINES], months[NLINES], days[NLINES], hours[NLINES], minutes[NLINES],
seconds[NLINES], ESs[NLINES];
float sscData[NLINES][NSYSTEMS*3], cxformOut[NLINES][NSYSTEMS*3];
char trash[20], temp[20], sscSysNames[NSYSTEMS][20];
/* Open SSCWeb ASCII file */
filePtr = fopen(fname, "r");
if (filePtr == 0)
{
printf("Error opening file. Exiting.\n");
exit(0);
}
printf("\nAttempting to read %d lines from %s\n\n", NLINES, fname);
/* Read header */
fscanf(filePtr, "%s%s%s%s%s%s%s%s", trash, sscSysNames[0], trash, sscSysNames[1],
trash, sscSysNames[2], trash, sscSysNames[3]);
fscanf(filePtr, "%s%s%s%s%s%s%s", trash, sscSysNames[4], trash, sscSysNames[5],
trash, sscSysNames[6], trash);
for (i=0; i<23; i++)
{
fscanf(filePtr, "%s", trash);
/*printf("%s\n", trash);*/
}
/* Read data */
for (i=0; i<NLINES; i++)
{
/* Read time */
if ((fscanf(filePtr, "%2d%1s%2d%1s%2d", &years[i], trash, &months[i], trash, &days[i]) < 1) ||
(fscanf(filePtr, "%2d%1s%2d%1s%2d", &hours[i], trash, &minutes[i], trash, &seconds[i]) < 1))
{
printf("EOF reached. Set NLINES smaller. Exiting.\n");
exit(0);
}
/* Convert date to YYYY format if nec */
if (years[i] < 50)
years[i] = years[i] + 2000;
else if (years[i] < 1900)
years[i] = years[i] + 1900;
/* Convert time to ephemeris seconds */
ESs[i] = date2es(years[i], months[i], days[i], hours[i], minutes[i], seconds[i]);
/*
printf("Read time: %4d/%0.2d/%0.2d %0.2d:%0.2d:%0.2d ", years[i], months[i], days[i], hours[i], minutes[i], seconds[i]);
printf("ES: %d\n", ESs[i]);
*/
/* Read position data */
for (j=0; j<3*NSYSTEMS; j++)
{
fscanf(filePtr, "%f", &sscData[i][j]);
}
}
/* Close the file */
fclose(filePtr);
/* Echo systems, convert J2000 & GM strings */
printf("\nRead the following systems:\n");
for (i=0; i<NSYSTEMS; i++)
{
if (strcmp(sscSysNames[i], "GEI/J2000") == 0)
strcpy(sscSysNames[i], "J2000");
else if (strcmp(sscSysNames[i], "GM") == 0)
strcpy(sscSysNames[i], "MAG");
printf("%s\n", sscSysNames[i]);
}
printf("\n");
/* Begin testing */
strcpy(srcSystem, "GSE"); /* Use 2nd parameter as source system */
srcSystemIndex = 4;
for (i=0; i<NSYSTEMS; i++)
{
for (j=0; j<NLINES; j++)
{
/* Parse input vector */
v_in[0] = sscData[j][srcSystemIndex*3+0];
v_in[1] = sscData[j][srcSystemIndex*3+1];
v_in[2] = sscData[j][srcSystemIndex*3+2];
/* Perform transformation (finally) */
retVal = cxform(srcSystem, sscSysNames[i], ESs[j], v_in, v_out);
if (retVal != 0)
{
printf("Error during call to cxform. Exiting.\n");
exit(0);
}
/* Place output vector */
cxformOut[j][i*3+0] = v_out[0];
cxformOut[j][i*3+1] = v_out[1];
cxformOut[j][i*3+2] = v_out[2];
/*
printf("Input Vector (%s): \t%f\t%f\t%f\n",
srcSystem, v_in[0], v_in[1], v_in[2]);
printf("Output Vector (%s):\t%f\t%f\t%f\n",
sscSysNames[i], v_out[0], v_out[1], v_out[2]);
*/
}
}
/* Perform comparison between SSC and CXFORM's results */
/* Open output file */
filePtrOut = fopen(fname_out, "w");
if (filePtrOut == 0)
{
printf("Error opening file for writing. Exiting.\n");
exit(0);
}
printf("\nWriting results to %s\n", fname_out);
fprintf(filePtrOut, "N=%d", NLINES);
for (i=0; i<NSYSTEMS; i++)
{
avgAbsDiff[0] = 0.0;
avgAbsDiff[1] = 0.0;
avgAbsDiff[2] = 0.0;
avgPctDiff[0] = 0.0;
avgPctDiff[1] = 0.0;
avgPctDiff[2] = 0.0;
fprintf(filePtrOut, "\nComparing transformation from %s to %s:\n", srcSystem, sscSysNames[i]);
for (j=0; j<NLINES; j++)
{
/*
printf("Absolute differences: %f\t%f\t%f\n", fabs(sscData[j][i*3+0]-cxformOut[j][i*3+0]),
fabs(sscData[j][i*3+1]-cxformOut[j][i*3+1]),
fabs(sscData[j][i*3+2]-cxformOut[j][i*3+2]));
*/
/*
printf("Percent differences: %f\t%f\t%f\n",
fabs(100.0 - (sscData[j][i*3+0]/cxformOut[j][i*3+0])*100.0),
fabs(100.0 - (sscData[j][i*3+1]/cxformOut[j][i*3+1])*100.0),
fabs(100.0 - (sscData[j][i*3+2]/cxformOut[j][i*3+2])*100.0));
*/
avgAbsDiff[0] = avgAbsDiff[0] + fabs(sscData[j][i*3+0]-cxformOut[j][i*3+0]);
avgAbsDiff[1] = avgAbsDiff[1] + fabs(sscData[j][i*3+1]-cxformOut[j][i*3+1]);
avgAbsDiff[2] = avgAbsDiff[2] + fabs(sscData[j][i*3+2]-cxformOut[j][i*3+2]);
avgPctDiff[0] = avgPctDiff[0] + fabs(100.0 - (sscData[j][i*3+0]/cxformOut[j][i*3+0])*100.0);
avgPctDiff[1] = avgPctDiff[1] + fabs(100.0 - (sscData[j][i*3+1]/cxformOut[j][i*3+1])*100.0);
avgPctDiff[2] = avgPctDiff[2] + fabs(100.0 - (sscData[j][i*3+2]/cxformOut[j][i*3+2])*100.0);
}
avgAbsDiff[0] = avgAbsDiff[0]/(float)NLINES;
avgAbsDiff[1] = avgAbsDiff[1]/(float)NLINES;
avgAbsDiff[2] = avgAbsDiff[2]/(float)NLINES;
avgPctDiff[0] = avgPctDiff[0]/(float)NLINES;
avgPctDiff[1] = avgPctDiff[1]/(float)NLINES;
avgPctDiff[2] = avgPctDiff[2]/(float)NLINES;
fprintf(filePtrOut, "Average absolute differences: \t%f\t%f\t%f\n", avgAbsDiff[0], avgAbsDiff[1], avgAbsDiff[2]);
fprintf(filePtrOut, "Average percent differences: \t%f\t%f\t%f\n", avgPctDiff[0], avgPctDiff[1], avgPctDiff[2]);
}
fclose(filePtrOut);
return 0;
}