/* decode skytraq subframe buffer --------------------------------------------*/
static int decode_stqsfrb(raw_t *raw)
{
int prn,sat,sys,id;
unsigned char *p=raw->buff+4;
trace(4,"decode_stqsfrb: len=%d\n",raw->len);
if (raw->len<40) {
trace(2,"stq subframe length error: len=%d\n",raw->len);
return -1;
}
prn=U1(p+1);
if (prn>MAXPRNGPS) prn+=MINPRNSBS-38;
if (!(sat=satno(MINPRNSBS<=prn?SYS_SBS:SYS_GPS,prn))) {
trace(2,"stq subframe satellite number error: prn=%d\n",prn);
return -1;
}
sys=satsys(sat,&prn);
if (sys==SYS_GPS) {
id=save_subfrm(sat,raw);
if (id==3) return decode_ephem(sat,raw);
if (id==4) return decode_alm1 (sat,raw);
if (id==5) return decode_alm2 (sat,raw);
return 0;
}
return 0;
}
/* decode ublox rxm-sfrb: subframe buffer ------------------------------------*/
static int decode_rxmsfrb(raw_t *raw)
{
unsigned int words[10];
int i,prn,sat,sys,id;
unsigned char *p=raw->buff+6;
trace(4,"decode_rxmsfrb: len=%d\n",raw->len);
if (raw->len<42) {
trace(2,"ubx rxmsfrb length error: len=%d\n",raw->len);
return -1;
}
prn=U1(p+1);
if (!(sat=satno(MINPRNSBS<=prn?SYS_SBS:SYS_GPS,prn))) {
trace(2,"ubx rxmsfrb satellite number error: prn=%d\n",prn);
return -1;
}
sys=satsys(sat,&prn);
if (sys==SYS_GPS) {
id=save_subfrm(sat,raw);
if (id==3) return decode_ephem(sat,raw);
if (id==4) return decode_alm1 (sat,raw);
if (id==5) return decode_alm2 (sat,raw);
return 0;
}
else if (sys==SYS_SBS) {
for (i=0,p+=2;i<10;i++,p+=4) words[i]=U4(p);
return sbsdecodemsg(raw->time,prn,words,&raw->sbsmsg)?3:0;
}
return 0;
}
/* decode skytraq subframe buffer --------------------------------------------*/
static int decode_stqsfrb(raw_t *raw)
{
int prn,sat,id;
unsigned char *p=raw->buff+4;
trace(4,"decode_stqsfrb: len=%d\n",raw->len);
if (raw->len<40) {
trace(2,"stq subframe length error: len=%d\n",raw->len);
return -1;
}
prn=U1(p+1);
if (!(sat=satno(SYS_GPS,prn))) {
trace(2,"stq subframe satellite number error: prn=%d\n",prn);
return -1;
}
id=save_subfrm(sat,raw);
if (id==3) return decode_ephem(sat,raw);
if (id==4) return decode_alm1 (sat,raw);
if (id==5) return decode_alm2 (sat,raw);
return 0;
}