| public Decode ( byte DataBlockBuffer, string Time, int &NumOfMessagesDecoded ) : string[] | ||
| DataBlockBuffer | byte | |
| Time | string | |
| NumOfMessagesDecoded | int | |
| Результат | string[] | |
public string[] Decode(byte[] DataBlockBuffer, string Time, out int NumOfMessagesDecoded)
{
// Define output data buffer
string[] DataOut = new string[1000];
// Determine the size of the datablock
int LengthOfDataBlockInBytes = DataBlockBuffer.Length;
// Index into the array of record strings
int DataOutIndex = 0;
// Reset buffer indexes
CurrentDataBufferOctalIndex = 0;
int DataBufferIndexForThisExtraction = 0;
// SIC/SAC Indexes
int SIC_Index = 0;
int SAC_Index = 0;
// Save off SIC/SAC and time in the case they are not present
// in each message. Some implementation have it only in the first record
int SIC = 0;
int SAC = 0;
// Lenght of the current record's FSPECs
int FSPEC_Length = 0;
// The four possible FSPEC octets
BitVector32 FourFSPECOctets = new BitVector32();
while ((DataBufferIndexForThisExtraction) < LengthOfDataBlockInBytes)
{
// Assume that there will be no more than 300 bytes in one record
byte[] LocalSingleRecordBuffer = new byte[3000];
Array.Copy(DataBlockBuffer, DataBufferIndexForThisExtraction, LocalSingleRecordBuffer, 0, (LengthOfDataBlockInBytes - DataBufferIndexForThisExtraction));
// Get all four data words, but use only the number specifed
// by the length of FSPEC words
FourFSPECOctets = ASTERIX.GetFourFSPECOctets(LocalSingleRecordBuffer);
// Determine Length of FSPEC fields in bytes
FSPEC_Length = ASTERIX.DetermineLenghtOfFSPEC(LocalSingleRecordBuffer);
// Check wether 010 is present
if (FourFSPECOctets[Bit_Ops.Bit7] == true)
{
// Determine SIC/SAC Index
SIC_Index = FSPEC_Length;
SAC_Index = SIC_Index + 1;
// Extract SIC/SAC Indexes.
DataOut[DataOutIndex] = LocalSingleRecordBuffer[SIC_Index].ToString() + '/' + LocalSingleRecordBuffer[SAC_Index].ToString();
// Save off data for other records
SIC = LocalSingleRecordBuffer[SIC_Index];
SAC = LocalSingleRecordBuffer[SAC_Index];
// Save of the current data buffer index so it can be used by
// Decoder
CurrentDataBufferOctalIndex = SAC_Index + 1;
}
else
{
CurrentDataBufferOctalIndex = FSPEC_Length;
// Extract SIC/SAC Indexes.
DataOut[DataOutIndex] = SIC.ToString() + '/' + SAC.ToString();
}
///////////////////////////////////////////////////////////////////////////
// Populate the current SIC/SAC and Time stamp for this meesage
//
I048DataItems[ItemIDToIndex("010")].value =
new ASTERIX.SIC_SAC_Time(SIC, SAC, ASTERIX.TimeOfReception);
Reset_Currently_Present_Flags();
// Loop for each FSPEC and determine what data item is present
for (int FSPEC_Index = 1; FSPEC_Index <= FSPEC_Length; FSPEC_Index++)
{
switch (FSPEC_Index)
{
case 1:
// 010 Data Source Identifier
if (FourFSPECOctets[Bit_Ops.Bit7] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 010:T";
I048DataItems[ItemIDToIndex("010")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("010")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 010:F";
// 140 Time-of-Day
if (FourFSPECOctets[Bit_Ops.Bit6] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 140:T";
I048DataItems[ItemIDToIndex("140")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("140")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 140:F";
// 020 Target Report Descriptor
if (FourFSPECOctets[Bit_Ops.Bit5] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 020:T";
I048DataItems[ItemIDToIndex("020")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("020")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 020:F";
// 040 Measured Position in Slant Polar Coordinates
if (FourFSPECOctets[Bit_Ops.Bit4] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 040:T";
I048DataItems[ItemIDToIndex("040")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("040")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 040:F";
// 070 Mode-3/A Code in Octal Representation
if (FourFSPECOctets[Bit_Ops.Bit3] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 070:T";
I048DataItems[ItemIDToIndex("070")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("070")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 070:F";
// 090 Flight Level in Binary Representation
if (FourFSPECOctets[Bit_Ops.Bit2] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 090:T";
I048DataItems[ItemIDToIndex("090")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("090")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 090:F";
// 130 Radar Plot Characteristics
if (FourFSPECOctets[Bit_Ops.Bit1] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 130:T";
I048DataItems[ItemIDToIndex("130")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("130")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 130:F";
break;
case 2:
// 220 Aircraft Address
if (FourFSPECOctets[Bit_Ops.Bit15] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 220:T";
I048DataItems[ItemIDToIndex("220")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("220")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 220:F";
// 240 Aircraft Identification
if (FourFSPECOctets[Bit_Ops.Bit14] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 240:T";
I048DataItems[ItemIDToIndex("240")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("240")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 240:F";
// 250 Mode S MB Data
if (FourFSPECOctets[Bit_Ops.Bit13] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 250:T";
I048DataItems[ItemIDToIndex("250")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("250")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 250:F";
// 161 Track Number
if (FourFSPECOctets[Bit_Ops.Bit12] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 161:T";
I048DataItems[ItemIDToIndex("161")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("161")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 161:F";
// 042 Calculated Position in Cartesian Coordinates
if (FourFSPECOctets[Bit_Ops.Bit11] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 042:T";
I048DataItems[ItemIDToIndex("042")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("042")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 042:F";
// 200 Calculated Track Velocity in Polar Representation
if (FourFSPECOctets[Bit_Ops.Bit10] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 200:T";
I048DataItems[ItemIDToIndex("200")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("200")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 200:F";
// 170 Track Status
if (FourFSPECOctets[Bit_Ops.Bit9] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 170:T";
I048DataItems[ItemIDToIndex("170")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("170")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 170:F";
break;
case 3:
// 210 Track Quality
if (FourFSPECOctets[Bit_Ops.Bit23] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 210:T";
I048DataItems[ItemIDToIndex("210")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("210")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 210:F";
// 030 Warning/Error Conditions
if (FourFSPECOctets[Bit_Ops.Bit22] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 030:T";
I048DataItems[ItemIDToIndex("030")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("030")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 030:F";
// 080 Mode-3/A Code Confidence Indicator
if (FourFSPECOctets[Bit_Ops.Bit21] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 080:T";
I048DataItems[ItemIDToIndex("080")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("080")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 080:F";
// 100 Mode-C Code and Confidence Indicator
if (FourFSPECOctets[Bit_Ops.Bit20] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 100:T";
I048DataItems[ItemIDToIndex("100")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("100")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 100:F";
// 110 Height Measured by 3D Radar
if (FourFSPECOctets[Bit_Ops.Bit19] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 110:T";
I048DataItems[ItemIDToIndex("110")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("110")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 110:F";
// 120 Radial Doppler Speed
if (FourFSPECOctets[Bit_Ops.Bit18] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 120:T";
I048DataItems[ItemIDToIndex("120")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("120")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 120:F";
// 230 Communications / ACAS Capability and Flight Status
if (FourFSPECOctets[Bit_Ops.Bit17] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 230:T";
I048DataItems[ItemIDToIndex("230")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("230")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 230:F";
break;
case 4:
// 260 ACAS Resolution Advisory Report
if (FourFSPECOctets[Bit_Ops.Bit31] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 260:T";
I048DataItems[ItemIDToIndex("260")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("260")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 260:F";
// 55 Mode-1 Code in Octal Representation
if (FourFSPECOctets[Bit_Ops.Bit30] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 55:T";
I048DataItems[ItemIDToIndex("055")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("055")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 55:F";
// 50 Mode-2 Code in Octal Representation
if (FourFSPECOctets[Bit_Ops.Bit29] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 50:T";
I048DataItems[ItemIDToIndex("050")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("050")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 50:F";
// 65 Mode-1 Code Confidence Indicator
if (FourFSPECOctets[Bit_Ops.Bit28] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 65:T";
I048DataItems[ItemIDToIndex("065")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("065")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 65:F";
// 60 Mode-2 Code Confidence Indicator
if (FourFSPECOctets[Bit_Ops.Bit27] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 60:T";
I048DataItems[ItemIDToIndex("060")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("060")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 60:F";
if (FourFSPECOctets[Bit_Ops.Bit26] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " SPI:T";
I048DataItems[ItemIDToIndex("SPI")].HasBeenPresent = true;
I048DataItems[ItemIDToIndex("SPI")].CurrentlyPresent = true;
}
else
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " SPI:F";
if (FourFSPECOctets[Bit_Ops.Bit25] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " Reserved Expansion";
}
break;
// Handle errors
default:
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " UKN:T";
break;
}
}
DataOutIndex++;
CAT48DecodeAndStore.Do(LocalSingleRecordBuffer);
DataBufferIndexForThisExtraction = DataBufferIndexForThisExtraction + CurrentDataBufferOctalIndex + 1;
}
// Return decoded data
NumOfMessagesDecoded = DataOutIndex;
return DataOut;
}
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]);
}
}
