/**
* Description of the Method
*/
public void close()
{
try
{
if (din != null)
{
din.close();
//Console.WriteLine("**** CLOSED: ::: " + din);
din = null;
}
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
}
}
//-----------------------------------------------------------------------
// Descroption: Method to open a Level2 Format file and build internal
// tables.
// Input: file - File object for the universal format data file
// startFlag - unused at this time
//-----------------------------------------------------------------------
//public void open (File file, int startFlag) {
/**
* Description of the Method
*
*@param nexrad_url Description of the Parameter
*@param start_flag Description of the Parameter
*/
public void read(string nexrad_url, int start_flag)
{
/*
* Read the file until we get an I/O exception (i.e., EOF)
*/
try
{
float azi;
float ele;
int i;
int julianDate;
int seconds;
byte[] bins = new byte[2332];
//if (file != level2File) {
//level2File = file;
_numberOfRecords = 0;
//din = new RandomAccessFile (file,"r");
//Console.WriteLine ("-----"+file+"-----");
//Console.WriteLine ("\nLoading Data starting with record"+
// numberOfRecords+" Be patient!");
try
{
if (nexrad_url.getProtocol().equals("file"))
{
din = new ucar.unidata.io.RandomAccessFile(nexrad_url.getFile().replaceAll("%20", " "), "r");
}
else
{
din = new ucar.unidata.io.http.HTTPRandomAccessFile(nexrad_url.toString());
}
din.order(ucar.unidata.io.RandomAccessFile.BIG_ENDIAN);
Console.WriteLine("**** OPENING: " + nexrad_url + " ::: " + din);
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
Console.WriteLine("ERROR WITH URL: " + nexrad_url);
return;
}
//Console.WriteLine("-----" + nexrad_url + "-----");
//Console.WriteLine("\nLoading Data starting with record" +
// numberOfRecords + " Be patient!");
// Skip over the 12 byte record header which is not used
din.skipBytes(RECORD_HEADER_SIZE);
// Read the date (julian from 1/1/1970) and time (milliseconds
// past midnight
julianDate = din.readInt();
seconds = din.readInt();
//Console.WriteLine("File header julian date [" + julianDate +
// "] - seconds [" + seconds + "]");
// }
// Initialize the cut fields. Remember that the number of cuts will
// probably be larger than the number of true cuts since the lowest
// few cuts a split (surveillance and Doppler). A true cut is
// basically a unique elevation.
numberOfCuts = 0;
numberOfTrueCuts = 0;
//for (cut=0;cut<20;cut++) // s.ansari - changed to 50 in case new vcp with more scans
for (cut = 0; cut < 50; cut++)
{
cutStart[cut] = -1;
}
// Read the entire file and return when we get an end-of-file
// exception. We assume that all level2 files contain less than
// MAX_LEVEL2_RECORDS.
for (record = _numberOfRecords; record < MAX_LEVEL2_RECORDS; record++)
{
readHeader(record);
// Check for and end-of-file condition
if (eof() != 0)
{
cutStart[oldCut + 1] = record;
return;
}
// Check to see if this is the last radial in the volume. If so,
// set the end of volume flag to 1.
if (radialStatus == 4)
{
endOfVolume = 1;
}
else
{
endOfVolume = 0;
}
// Only process digital radar data messages. Ignore the rest for
// now.
if (getMessageType() == 1)
{
// Extract the azimuth and elevation angles of the radial.
azimuth[record] = getAzimuth();
elevation[record] = getElevation();
// If a new elevation cut has started, update the cut LUT
if (oldCut != getElevationNum())
{
if (verbose)
{
Console.WriteLine("messageSize [" + messageSize + "]");
}
if (getElevationNum() > 0)
{
if (verbose)
{
Console.WriteLine("New cut --> " + getElevationNum() +
" at record " + record);
}
oldCut = getElevationNum();
cutStart[getElevationNum() - 1] = record;
cutElevation[numberOfCuts] = elevation[record];
// We also need to maintain a table of unique elevation
// cuts to account for split cuts.
deltaElevation = Math.Abs(elevation[record] - oldElevation);
if (deltaElevation > 0.1)
{
trueElevation[numberOfTrueCuts] = elevation[record];
numberOfTrueCuts++;
}
oldElevation = elevation[record];
cutIndex[numberOfCuts] = numberOfTrueCuts;
numberOfCuts++;
if (verbose)
{
Console.WriteLine("dBZ bins [" + getBinNum(REFLECTIVITY) + "]");
Console.WriteLine("Vel bins [" + getBinNum(VELOCITY) + "]");
}
}
else
{
return;
}
}
_numberOfRecords++;
}
else
{
// Since this message doesn't contain radar data, set the
// azimuth/elevation LUT table entries to -1 to indicate this
// record doesn't contain radar data.
if (verbose)
{
Console.WriteLine("Message type " + getMessageType() + " detected");
}
azimuth[record] = -1;
elevation[record] = -1;
}
}
// For EOF exceptions just print a message.
}
catch (Exception e)
{
// Console.WriteLine (e);
}
}
