cdm/src/main/java/ucar/nc2/iosp/nids/Nidsheader.java
byte[] uncompressed( ByteBuffer buf, int offset, int uncomplen ) throws IOException
    {
        byte[] header = new byte[offset];
        buf.position(0);
        buf.get(header);
        byte[] out = new byte[offset+uncomplen];
        System.arraycopy(header, 0, out, 0, offset);


        CBZip2InputStream cbzip2 = new CBZip2InputStream();

        int numCompBytes = buf.remaining();
        byte[] bufc = new byte[numCompBytes];
        buf.get(bufc, 0, numCompBytes);

        ByteArrayInputStream bis = new ByteArrayInputStream(bufc, 2, numCompBytes - 2);

        //CBZip2InputStream cbzip2 = new CBZip2InputStream(bis);
        cbzip2.setStream(bis);
        int total = 0;
        int nread;
        byte[] ubuff = new byte[40000];
        byte[] obuff = new byte[40000];
        try {
            while ((nread = cbzip2.read(ubuff)) != -1) {
              if (total + nread > obuff.length) {
                byte[] temp = obuff;
                obuff = new byte[temp.length * 2];
                System.arraycopy(temp, 0, obuff, 0, temp.length);
              }
              System.arraycopy(ubuff, 0, obuff, total, nread);
              total += nread;
            }
            if (obuff.length >= 0)
              System.arraycopy(obuff, 0, out, offset, total);
          } catch (BZip2ReadException ioe) {
            log.warn("Nexrad2IOSP.uncompress "+raf.getLocation(), ioe);
        }

        return out;

    }
byte[] uncompressed( ByteBuffer buf, int offset, int uncomplen ) throws IOException
    {
        byte[] header = new byte[offset];
        buf.position(0);
        buf.get(header);
        byte[] out = new byte[offset+uncomplen];
        System.arraycopy(header, 0, out, 0, offset);


        CBZip2InputStream cbzip2 = new CBZip2InputStream();

        int numCompBytes = buf.remaining();
        byte[] bufc = new byte[numCompBytes];
        buf.get(bufc, 0, numCompBytes);

        ByteArrayInputStream bis = new ByteArrayInputStream(bufc, 2, numCompBytes - 2);

        //CBZip2InputStream cbzip2 = new CBZip2InputStream(bis);
        cbzip2.setStream(bis);
        int total = 0;
        int nread;
        byte[] ubuff = new byte[40000];
        byte[] obuff = new byte[40000];
        try {
            while ((nread = cbzip2.read(ubuff)) != -1) {
              if (total + nread > obuff.length) {
                byte[] temp = obuff;
                obuff = new byte[temp.length * 2];
                System.arraycopy(temp, 0, obuff, 0, temp.length);
              }
              System.arraycopy(ubuff, 0, obuff, total, nread);
              total += nread;
            }
            if (obuff.length >= 0)
              System.arraycopy(obuff, 0, out, offset, total);
          } catch (BZip2ReadException ioe) {
            log.warn("Nexrad2IOSP.uncompress "+raf.getLocation(), ioe);
        }

        return out;

    }
uncompress the TDWR products
@param buf          compressed buffer
@param offset       data offset
@param uncomplen    uncompressed length
@return
@throws IOException