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test
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test
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@@ -1,4 +1,348 @@
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```c
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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/*---------------------------*/
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/* Conventional Routines */
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/*---------------------------*/
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#define MxGEN 9
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#define RAD (180./3.14159265359)
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#define MxMOD 19
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#define MxELM ((MxMOD+1)*(MxMOD+1)-1)
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#define MxCOL 50
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#define LLINE (MxCOL*9 + 10)
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void gigrf(int gen, double year)
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{ int maxod, i, n, m, l, k, ncol, nlin;
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double y1, y2, yr1, yr2, dy;
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double tzero, dmy[3], cb[MxELM], cv[MxELM];
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char path[]="/home/SHARE/data/IGRFCOEF/igrf00.coef";
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char file[]="/home/SHARE/data/IGRFCOEF/igrf00.coef";
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char *pstr, *line, buf[LLINE];
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FILE *fp;
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if ((gen<1) || (MxGEN<gen))
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{ fprintf(stderr, "gigrf: unknown NGEN = %d\n", gen); exit(1); }
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strcpy(file, path);
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if ((pstr=strstr(file,"00")) == NULL)
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{ fprintf(stderr, "gigrf: filename invalid\n"); exit(1); }
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sprintf(buf, "%02d", gen); strncpy(pstr, buf, 2);
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if ((fp=fopen(file,"r")) == NULL)
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{ fprintf(stderr, "gigrf: file not found\n"); exit(1); }
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if (fgets(buf,LLINE,fp) == NULL)
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{ fprintf(stderr, "gigrf: file empty\n"); exit(1); }
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if (sscanf(buf,"%d%d%lf%lf",&maxod,&ncol,&y1,&y2) != 4)
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{ fprintf(stderr, "gigrf: Line-1 format error\n"); exit(1); }
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if ((maxod<8) || (maxod>MxMOD) || (ncol<2) || (ncol>MxCOL))
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{ fprintf(stderr, "gigrf: Line-1 invalid\n"); exit(1); }
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nlin = (maxod+1)*(maxod+1) - 1;
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if ((year<y1) || (year>y2))
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fprintf(stderr, "gigrf: IGRF-%02d not defined for %9.3lf\n", gen,year);
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if (fgets(buf,LLINE,fp) == NULL)
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{ fprintf(stderr, "gigrf: EOF before Line-2\n"); exit(1); }
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line = &buf[1];
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if (sscanf(line,"%*c%*d%*d%lf%n",&yr2,&n) == EOF)
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{ fprintf(stderr, "gigrf: Line-2 invalid\n"); exit(1); }
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for (l=2; l<ncol; l++) {
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line += n; yr1 = yr2;
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if (sscanf(line,"%lf%n",&yr2,&n) == EOF)
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{ fprintf(stderr, "gigrf: Line-2 short\n"); exit(1); }
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if (year < yr2) break;
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}
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for (i=0; i<nlin; i++) {
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if (fgets(buf,LLINE,fp) == NULL)
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{ fprintf(stderr, "gigrf: EOF before Line-%d\n", i+3); exit(1); }
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line = &buf[0];
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if (sscanf(line,"%*c%*d%*d%n",&n) == EOF)
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{ fprintf(stderr, "gigrf: Line-%d invalid\n", i+3); exit(1); }
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for (m=2; m<l; m++) {
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line += n;
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if (sscanf(line,"%*lf%n",&n) == EOF)
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{ fprintf(stderr, "gigrf: Line-%d short\n", i+3); exit(1); }
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}
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line += n;
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if (sscanf(line,"%lf%lf",&cb[i],&cv[i]) != 2)
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{ fprintf(stderr, "gigrf: Line-%d short\n", i+3); exit(1); }
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}
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if (l == ncol) tzero = yr2;
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else {
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tzero = yr1; yr2 -= yr1;
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for (i=0; i<nlin; i++) cv[i] = (cv[i]-cb[i])/yr2;
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}
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k = 0;
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for (i=0,n=1; n<=maxod; n++) {
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vgh[0][n]=cb[i]; vght[0][n]=cv[i]; i++;
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if ((cb[i]!=0.) || (cv[i]!=0.)) k = n;
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for (m=1; m<=n; m++) {
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vgh[m][n]=cb[i]; vght[m][n]=cv[i]; i++;
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if ((cb[i]!=0.) || (cv[i]!=0.)) k = n;
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vgh[n][m-1]=cb[i]; vght[n][m-1]=cv[i]; i++;
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if ((cb[i]!=0.) || (cv[i]!=0.)) k = n;
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}
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}
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maxod = k;
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field(6378.16, 298.25, 6371.2, maxod);
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tcoef(vgh, vght, tzero, 0, dmy); tyear(year);
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}
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void igrfc(double fido, double fkeido, double hght, double *tf)
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{ double fx, fy, fz;
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mfldg(fido, fkeido, hght/1000., &fx, &fy, &fz, tf);
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}
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void igrfm(double fm[6])
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{ double gx, gy, gz, h, dip, dec;
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gcomp(&gx, &gy, &gz);
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h=sqrt(gx*gx+gy*gy); dip=atan2(gz,h); dec=atan2(gy,gx);
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fm[0]=gx; fm[1]=gy; fm[2]=gz; fm[3]=h; fm[4]=dip*RAD; fm[5]=dec*RAD;
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}
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void sigrf(double year)
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{ int maxod, i, n, m, l;
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double tzero, dmy[3];
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l=(int)(year-1970.)/5; if (l < 0) l=0; else if (l >= 7) l=6;
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if (l < 2) maxod=8; else maxod=10;
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tzero=(double)(l*5 + 1970); if (l==0) tzero=1965.;
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if ((year<1955.) || (year>2005.))
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fprintf(stderr, "sigrf: IGRF not available for %8.3lf\n", year);
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for (i=0,n=1; n<=maxod; n++) {
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vgh[0][n]=rf[l][i];
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if (n<=8) vght[0][n]=sv[l][i]; else vght[0][n]=0.;
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i++;
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for (m=1; m<=n; m++) {
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233
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vgh[m][n]=rf[l][i];
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if (n<=8) vght[m][n]=sv[l][i]; else vght[m][n]=0.;
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i++;
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vgh[n][m-1]=rf[l][i];
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240
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241
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if (n<=8) vght[n][m-1]=sv[l][i]; else vght[n][m-1]=0.;
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i++;
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245
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}
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246
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}
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248
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field(6378.16, 298.25, 6371.2, maxod);
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250
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251
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tcoef(vgh, vght, tzero, 0, dmy); tyear(year);
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252
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253
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}
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254
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255
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256
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257
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void sdgrf(double year)
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258
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259
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{ int i, n, m, l;
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260
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261
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double dmy[3];
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262
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263
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l=(int)(year-1945.)/5; if (l < 0) l=0; else if (l >= 9) l=8;
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264
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265
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if ((year<1945.) || (year>1990.))
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266
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267
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fprintf(stderr, "sdgrf: DGRF not available for %8.3lf\n", year);
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268
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269
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for (i=0,n=1; n<=10; n++) {
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270
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271
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vgh[0][n]=df[l][i]; vght[0][n]=(df[l+1][i]-df[l][i])/5.; i++;
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272
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273
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for (m=1; m<=n; m++) {
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vgh[m][n]=df[l][i]; vght[m][n]=(df[l+1][i]-df[l][i])/5.; i++;
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276
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vgh[n][m-1]=df[l][i]; vght[n][m-1]=(df[l+1][i]-df[l][i])/5.; i++;
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278
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279
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}
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280
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281
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}
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282
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283
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field(6378.16, 298.25, 6371.2, 10);
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284
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285
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tcoef(vgh, vght, (double)(1945+l*5), 0, dmy); tyear(year);
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286
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+
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287
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}
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288
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289
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290
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291
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void spgrf(double year)
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292
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293
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{ int i, n, m, l;
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294
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+
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295
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double dmy[3];
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296
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+
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297
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l=(int)(year-1945.)/5; if (l < 6) l=6; else if (l >= 10) l=9;
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298
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+
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299
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if ((year<1975.) || (year>1995.))
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300
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+
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301
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fprintf(stderr, "spgrf: PGRF not available for %8.3lf\n", year);
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302
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+
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303
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for (i=0,n=1; n<=10; n++) {
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304
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+
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305
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vgh[0][n]=df[l][i]; vght[0][n]=(rf[l-4][i]-df[l][i])/5.; i++;
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306
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+
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307
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for (m=1; m<=n; m++) {
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308
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+
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309
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vgh[m][n]=df[l][i]; vght[m][n]=(rf[l-4][i]-df[l][i])/5.; i++;
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310
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+
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311
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vgh[n][m-1]=df[l][i]; vght[n][m-1]=(rf[l-4][i]-df[l][i])/5.; i++;
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312
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+
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313
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+
}
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314
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+
|
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315
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+
}
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316
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+
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317
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+
field(6378.16, 298.25, 6371.2, 10);
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318
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+
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319
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+
tcoef(vgh, vght, (double)(1945+l*5), 0, dmy); tyear(year);
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320
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+
|
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321
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+
}
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322
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+
|
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323
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+
|
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324
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+
|
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325
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+
void gigrf_(int *gen, float *year) { gigrf(*gen, (double)*year); }
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326
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+
|
|
327
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+
void igrfc_(float *fi, float *fk, float *h, float *f)
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328
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+
|
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329
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+
{ double df; igrfc((double)*fi,(double)*fk,(double)*h,&df); *f=df; }
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330
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+
|
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331
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+
void igrfm_(float fm[6])
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332
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+
|
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333
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+
{ double dfm[6]; int i; igrfm(dfm); for (i=0; i<6; i++) fm[i]=dfm[i]; }
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334
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+
|
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335
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void sigrf_(float *year) { sigrf((double)*year); }
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336
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+
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337
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+
void sdgrf_(float *year) { sdgrf((double)*year); }
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338
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+
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339
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+
void spgrf_(float *year) { spgrf((double)*year); }
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340
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+
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341
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+
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342
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+
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343
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+
コード
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344
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+
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1
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-
### 前提・実現したいこと
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345
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+
```### 前提・実現したいこと
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2
346
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3
347
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igrfによる磁場を計算するプログラムを学習しています
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4
348
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