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Fix eph2clk() and geph2clk() iterative solving #489

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Fix eph2clk() and geph2clk() iterative solving #489

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14 changes: 8 additions & 6 deletions src/ephemeris.c
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Original file line number Diff line number Diff line change
Expand Up @@ -178,15 +178,16 @@ extern void alm2pos(gtime_t time, const alm_t *alm, double *rs, double *dts)
*-----------------------------------------------------------------------------*/
extern double eph2clk(gtime_t time, const eph_t *eph)
{
double t;
double t,t0;
int i;

trace(4,"eph2clk : time=%s sat=%2d\n",time_str(time,3),eph->sat);

t=timediff(time,eph->toc);
t0=timediff(time,eph->toc);
t=t0;

for (i=0;i<2;i++) {
t-=eph->f0+eph->f1*t+eph->f2*t*t;
t=t0-(eph->f0+eph->f1*t+eph->f2*t*t);
}
return eph->f0+eph->f1*t+eph->f2*t*t;
}
Expand Down Expand Up @@ -312,15 +313,16 @@ static void glorbit(double t, double *x, const double *acc)
*-----------------------------------------------------------------------------*/
extern double geph2clk(gtime_t time, const geph_t *geph)
{
double t;
double t,t0;
int i;

trace(4,"geph2clk: time=%s sat=%2d\n",time_str(time,3),geph->sat);

t=timediff(time,geph->toe);
t0=timediff(time,geph->toe);
t=t0;

for (i=0;i<2;i++) {
t-=-geph->taun+geph->gamn*t;
t=t0-(-geph->taun+geph->gamn*t);
}
return -geph->taun+geph->gamn*t;
}
Expand Down