private static void ExtractAndDecodeASTERIX_CAT_DataBlock(byte[] DataBlock, bool Is_Live_Data)
{
// First thing is to store the time of the reception regardless of the category received
string Time = DateTime.Now.Hour.ToString().PadLeft(2, '0') + ":" + DateTime.Now.Minute.ToString().PadLeft(2, '0') + ":" +
DateTime.Now.Second.ToString().PadLeft(2, '0') + ":" + DateTime.Now.Millisecond.ToString().PadLeft(3, '0');
// Save off the time of reception so decoders can use it
TimeOfReception = DateTime.Now;
// Extract ASTERIX category
string Category = ASTERIX.ExtractCategory(DataBlock);
// Extract lenght in Bytes, as indicated by the ASTERIX
string LengthOfDataBlockInBytes = ASTERIX.ExtractLengthOfDataBlockInBytes(DataBlock);
// Here format the lenght of bytes
// to always use 3 characters for better alignement
if (LengthOfDataBlockInBytes.Length < 3)
{
LengthOfDataBlockInBytes = "0" + LengthOfDataBlockInBytes;
}
else if (LengthOfDataBlockInBytes.Length < 2)
{
LengthOfDataBlockInBytes = "00" + LengthOfDataBlockInBytes;
}
// Define a string to store data not specific for all messages and add commond data
// 1. TIME of reception
// 2. Source IP address
// 3. Multicast IP address
// 4. Length of data block in bytes
// 5. Asterix Category
//
// 6. Append Category specifc data, done just below
string Common_Message_Data_String;
if (Is_Live_Data == true)
{
Common_Message_Data_String = Time + " " + iep.ToString() + " " + SharedData.CurrentMulticastAddress + ':' + SharedData.Current_Port.ToString() + " " + LengthOfDataBlockInBytes.ToString() + " " + Category + " ";
}
else
{
Common_Message_Data_String = Time + " " + "Recorded" + " " + "Recorded" + ':' + "Recorded" + " " + LengthOfDataBlockInBytes.ToString() + " " + Category + " ";
}
// Hold individual records of the messages
// from an individual data block
string[] MessageData = new string[3000];
byte[] DataBlockNoCATandLEN = new byte[DataBlock.Length - 3];
// Now after we extracted Category and Lenght of the Data Block lets remove the first three octets from the data
// buffer and pass it on to individual message handlers to do message decoding
Array.Copy(DataBlock, 3, DataBlockNoCATandLEN, 0, (DataBlock.Length - 3));
DataBlock = DataBlockNoCATandLEN;
// Now do a switch based on the category received
int NumOfMsgsDecoded = 0;
switch (Category)
{
// Monoradar Data Target Reports, from a Radar Surveillance System to an SDPS
// (plots and tracks from PSRs, SSRs, MSSRs, excluding Mode S and ground surveillance)
case "001":
if (Properties.Settings.Default.CAT_001_Enabled == true)
{
CAT01 MyCAT01 = new CAT01();
MessageData = MyCAT01.Decode(DataBlock, Time, out NumOfMsgsDecoded);
}
break;
// Monoradar Service Messages (status, North marker, sector crossing messages)
case "002":
if (Properties.Settings.Default.CAT_002_Enabled == true)
{
CAT02 MyCAT02 = new CAT02();
MessageData = MyCAT02.Decode(DataBlock, Time, out NumOfMsgsDecoded);
}
break;
// Monoradar Derived Weather Information
case "008":
if (Properties.Settings.Default.CAT_008_Enabled == true)
{
CAT08 MyCAT08 = new CAT08();
}
break;
// Next version of Category 002: PSR Radar, M-SSR Radar, Mode-S Station
case "034":
if (Properties.Settings.Default.CAT_034_Enabled == true)
{
CAT34 MyCAT34 = new CAT34();
MessageData = MyCAT34.Decode(DataBlock, Time, out NumOfMsgsDecoded);
}
break;
// Next version of Category 001: PSR Radar, M-SSR Radar, Mode-S Station
case "048":
if (Properties.Settings.Default.CAT_048_Enabled == true)
{
CAT48 MyCAT48 = new CAT48();
MessageData = MyCAT48.Decode(DataBlock, Time, out NumOfMsgsDecoded);
}
break;
// System Track Data(next version of Category 030 & 011, also applicable to non-ARTAS systems)
case "062":
if (Properties.Settings.Default.CAT_062_Enabled == true)
{
CAT62 MyCAT62 = new CAT62();
MessageData = MyCAT62.Decode(DataBlock, Time, out NumOfMsgsDecoded);
}
break;
// Sensor Status Messages (SPDS)
case "063":
if (Properties.Settings.Default.CAT_063_Enabled == true)
{
CAT63 MyCAT63 = new CAT63();
}
break;
// SDPS Service Status Messages (SDPS)
case "065":
if (Properties.Settings.Default.CAT_065_Enabled == true)
{
CAT65 MyCAT65 = new CAT65();
}
break;
// Transmission of Reference Trajectory State Vectors
case "244":
if (Properties.Settings.Default.CAT_244_Enabled == true)
{
CAT244 MyCAT244 = new CAT244();
}
break;
// Handle unsupported data/categories
default:
Common_Message_Data_String = Common_Message_Data_String + " Unsupported category " + Category + " has been received";
break;
}
if (Properties.Settings.Default.PopulateMainListBox == true)
{
for (int I = 0; I < NumOfMsgsDecoded; I++)
{
SharedData.DataBox.Items.Add(Common_Message_Data_String + MessageData[I]);
}
}
}
