public string[] Decode(byte[] DataBlockBuffer, string Time, out int NumOfMessagesDecoded)
{
// Define output data buffer
string[] DataOut = new string[3000];
// 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;
// Determine SIC/SAC Index
int SIC_Index = 0;
int SAC_Index = 0;
// Lenght of the current record's FSPECs
int FSPEC_Length = 0;
// Creates and initializes a BitVector32 with all bit flags set to FALSE.
BitVector32 FourFSPECOctets = new BitVector32();
while (DataBufferIndexForThisExtraction < LengthOfDataBlockInBytes)
{
// Assume that there will be no more than 1000 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 of the current data buffer index so it can be used by
// Decoder
CurrentDataBufferOctalIndex = SAC_Index + 1;
}
else
{
// Extract SIC/SAC Indexes.
DataOut[DataOutIndex] = "---" + '/' + "---";
}
///////////////////////////////////////////////////////////////////////////
// Populate the current SIC/SAC and Time stamp for this meesage
//
I002DataItems[ItemIDToIndex("010")].value =
new ASTERIX.SIC_SAC_Time(LocalSingleRecordBuffer[SIC_Index], LocalSingleRecordBuffer[SAC_Index], ASTERIX.TimeOfReception);
// 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";
I002DataItems[ItemIDToIndex("010")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("010")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 010:F";
I002DataItems[ItemIDToIndex("010")].CurrentlyPresent = false;
}
// 000 Message Type
if (FourFSPECOctets[Bit_Ops.Bit6] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 000:T";
I002DataItems[ItemIDToIndex("000")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("000")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 000:F";
I002DataItems[ItemIDToIndex("000")].CurrentlyPresent = false;
}
// 020 Sector Number
if (FourFSPECOctets[Bit_Ops.Bit5] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 020:T";
I002DataItems[ItemIDToIndex("020")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("020")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 020:F";
I002DataItems[ItemIDToIndex("020")].CurrentlyPresent = false;
}
// 030 Time of Day
if (FourFSPECOctets[Bit_Ops.Bit4] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 030:T";
I002DataItems[ItemIDToIndex("030")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("030")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 030:F";
I002DataItems[ItemIDToIndex("030")].CurrentlyPresent = false;
}
// 041 Antenna Rotation Period
if (FourFSPECOctets[Bit_Ops.Bit3] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 041:T";
I002DataItems[ItemIDToIndex("041")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("041")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 041:F";
I002DataItems[ItemIDToIndex("041")].CurrentlyPresent = false;
}
// 050 Station Configuration Status
if (FourFSPECOctets[Bit_Ops.Bit2] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 050:T";
I002DataItems[ItemIDToIndex("050")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("050")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 050:F";
I002DataItems[ItemIDToIndex("050")].CurrentlyPresent = false;
}
// 060 Station Processing Mode
if (FourFSPECOctets[Bit_Ops.Bit1] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 060:T";
I002DataItems[ItemIDToIndex("060")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("060")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 060:F";
I002DataItems[ItemIDToIndex("060")].CurrentlyPresent = false;
}
break;
case 2:
// 070 Plot Count Values
if (FourFSPECOctets[Bit_Ops.Bit15] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 070:T";
I002DataItems[ItemIDToIndex("070")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("070")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 070:F";
I002DataItems[ItemIDToIndex("070")].CurrentlyPresent = false;
}
// 100 Dynamic Window - Type 1
if (FourFSPECOctets[Bit_Ops.Bit14] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 100:T";
I002DataItems[ItemIDToIndex("100")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("100")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 100:F";
I002DataItems[ItemIDToIndex("100")].CurrentlyPresent = false;
}
// 090 Collimation Error
if (FourFSPECOctets[Bit_Ops.Bit13] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 090:T";
I002DataItems[ItemIDToIndex("090")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("090")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 090:F";
I002DataItems[ItemIDToIndex("090")].CurrentlyPresent = false;
}
// 080 Warning/Error Conditions
if (FourFSPECOctets[Bit_Ops.Bit12] == true)
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 080:T";
I002DataItems[ItemIDToIndex("080")].HasBeenPresent = true;
I002DataItems[ItemIDToIndex("080")].CurrentlyPresent = true;
}
else
{
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " 080:F";
I002DataItems[ItemIDToIndex("080")].CurrentlyPresent = false;
}
break;
// Handle errors
default:
DataOut[DataOutIndex] = DataOut[DataOutIndex] + " UKN:T";
break;
}
}
DataOutIndex++;
CAT02DecodeAndStore.Do(LocalSingleRecordBuffer);
DataBufferIndexForThisExtraction = DataBufferIndexForThisExtraction + CurrentDataBufferOctalIndex + 1;
}
// Return decoded data
NumOfMessagesDecoded = DataOutIndex;
return(DataOut);
}