private bool UpdateSnr(int prn, int snr, GNSSSatelliteType type)
{
for (int i = 0; i < MaxSattellite; i++)
{
switch (type)
{
case GNSSSatelliteType.Gps:
if (prn < 1 || prn > 32)
{ //pass the special satellite for gps. In different module it may not have these satellite.
return false;
}
if (gpSate[i].prn == NullValue)
{
gpSate[i].prn = prn;
gpSate[i].snr = snr;
gpSate[i].inUse = false;
return true;
}
else if (gpSate[i].prn == prn)
{
gpSate[i].snr = snr;
return true;
}
break;
case GNSSSatelliteType.Glonass:
if (glSate[i].prn == NullValue)
{
glSate[i].prn = prn;
glSate[i].snr = snr;
glSate[i].inUse = false;
return true;
}
else if (glSate[i].prn == prn)
{
glSate[i].snr = snr;
return true;
}
break;
case GNSSSatelliteType.Beidou:
if (bdSate[i].prn == NullValue)
{
bdSate[i].prn = prn;
bdSate[i].snr = snr;
bdSate[i].inUse = false;
return true;
}
else if (bdSate[i].prn == prn)
{
bdSate[i].snr = snr;
return true;
}
break;
case GNSSSatelliteType.Galileo:
break;
}
}
return false;
}
private sateInfo[] GetSortedSateArray(GNSSSatelliteType t)
{
sateInfo[] s = GetSateArray(t).Clone() as sateInfo[];
Array.Sort(s, delegate(sateInfo s1, sateInfo s2)
{
return s2.snr.CompareTo(s1.snr);
} );
return s;
}
private int GetSpecSate(GNSSSatelliteType t, int id1, int id2, int id3, ref int sn1, ref int sn2, ref int sn3)
{
int getCount = 0;
int snr;
snr = GetSnr(id1, t).snr;
if (snr != NullValue)
{
sn1 = snr;
getCount++;
}
snr = GetSnr(id2, t).snr;
if (snr != NullValue)
{
sn2 = snr;
getCount++;
}
snr = GetSnr(id3, t).snr;
if (snr != NullValue)
{
sn3 = snr;
getCount++;
}
return getCount;
}
private sateInfo[] GetSateArray(GNSSSatelliteType t)
{
switch (t)
{
case GNSSSatelliteType.Gps:
return gpSate;
case GNSSSatelliteType.Glonass:
return glSate;
case GNSSSatelliteType.Beidou:
return bdSate;
case GNSSSatelliteType.Galileo:
return null;
default:
return null;
}
}
private sateInfo GetSate(int i, GNSSSatelliteType t)
{
switch (t)
{
case GNSSSatelliteType.Gps:
return gpSate[i];
case GNSSSatelliteType.Glonass:
return glSate[i];
case GNSSSatelliteType.Beidou:
return bdSate[i];
case GNSSSatelliteType.Galileo:
//return glSate[i];
break;
}
return NullSate;
}
private int GetFrontSate(GNSSSatelliteType t, ref int id1, ref int id2, ref int id3, ref int sn1, ref int sn2, ref int sn3)
{
sateInfo[] sortedSateArray = GetSateArray(t).Clone() as sateInfo[];
for (int i = 0; i < MaxSattellite; i++)
{
for (int j = i + 1; j < MaxSattellite; j++)
{
if (sortedSateArray[i].snr < sortedSateArray[j].snr)
{
sateInfo tmp = sortedSateArray[i];
sortedSateArray[i] = sortedSateArray[j];
sortedSateArray[j] = tmp;
}
}
}
if (sortedSateArray[0].snr == NullValue)
{
return 0;
}
id1 = sortedSateArray[0].prn;
sn1 = sortedSateArray[0].snr;
if (sortedSateArray[1].snr == NullValue)
{
return 1;
}
id2 = sortedSateArray[1].prn;
sn2 = sortedSateArray[1].snr;
if (sortedSateArray[2].snr == NullValue)
{
return 2;
}
id3 = sortedSateArray[2].prn;
sn3 = sortedSateArray[2].snr;
return 3;
}
public sateInfo GetSnr(int prn, GNSSSatelliteType t)
{
sateInfo[] p = GetSateArray(t);
for (int i = 0; i < MaxSattellite; i++)
{
if (p[i].prn == prn)
{
return p[i];
}
}
return NullSate;
}
public sateInfo GetRealBeidouSnr(int prn, GNSSSatelliteType t)
{
sateInfo[] p = GetSateArray(t);
for (int i = 0; i < MaxSattellite; i++)
{
if (GetRealBeidouPrn(p[i].prn) == GetRealBeidouPrn(prn))
{
return p[i];
}
}
return NullSate;
}