public byte[] gen_rtcm(type1002 obs)
{
byte[] buffer = new u8[300];
uint len = 0;
uint i = 0;
uint nbit = 0;
uint nbyte = 0;
rtcmpreamble pre = new rtcmpreamble();
pre.Write(buffer);
rtcmheader head = new rtcmheader();
head.messageno = 1002;
head.nsat = (byte)obs.obs.Count;
head.epoch = (u32)obs.obs[0].tow;
head.Write(buffer);
nbit = obs.Write(buffer);
/* padding to align 8 bit boundary */
for (i = nbit; (i % 8) > 0; i++)
{
setbitu(buffer, i, 1, 0);
}
/* message length (header+data) (bytes) */
if ((len = i / 8) >= 3 + 1024)
{
/*trace(2,"generate rtcm 3 message length error len=%d\n",rtcm->len-3);*/
nbit = len = 0;
return(null);
}
/* message length without header and parity */
setbitu(buffer, 14, 10, len - 3);
/* crc-24q */
uint crc = crc24q(buffer, len, 0);
setbitu(buffer, i, 24, crc);
/* length total (bytes) */
nbyte = len + 3;
Array.Resize <byte>(ref buffer, (int)nbyte);
return(buffer);
}
public byte[] gen_rtcm(type1002 obs)
{
byte[] buffer = new u8[300];
uint len = 0;
uint i = 0;
uint nbit = 0;
uint nbyte = 0;
rtcmpreamble pre = new rtcmpreamble();
pre.Write(buffer);
rtcmheader head = new rtcmheader();
head.messageno = 1002;
head.nsat = (byte)obs.obs.Count;
head.epoch = (u32)obs.obs[0].tow;
head.Write(buffer);
nbit = obs.Write(buffer);
/* padding to align 8 bit boundary */
for (i = nbit; (i % 8) > 0; i++)
setbitu(buffer, i, 1, 0);
/* message length (header+data) (bytes) */
if ((len = i / 8) >= 3 + 1024)
{
/*trace(2,"generate rtcm 3 message length error len=%d\n",rtcm->len-3);*/
nbit = len = 0;
return null;
}
/* message length without header and parity */
setbitu(buffer, 14, 10, len - 3);
/* crc-24q */
uint crc = crc24q(buffer, len, 0);
setbitu(buffer, i, 24, crc);
/* length total (bytes) */
nbyte = len + 3;
Array.Resize<byte>(ref buffer, (int)nbyte);
return buffer;
}