ucar.nc2.iosp.nowrad.NOWRadheader Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of netcdf Show documentation
Show all versions of netcdf Show documentation
The NetCDF-Java Library is a Java interface to NetCDF files,
as well as to many other types of scientific data formats.
The newest version!
/*
* Copyright (c) 1998 - 2010. University Corporation for Atmospheric Research/Unidata
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
* supporting documentation. Further, UCAR requests that the user credit
* UCAR/Unidata in any publications that result from the use of this
* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
* to endorse or promote any products or commercial entity unless specific
* written permission is obtained from UCAR/Unidata. The user also
* understands that UCAR/Unidata is not obligated to provide the user with
* any support, consulting, training or assistance of any kind with regard
* to the use, operation and performance of this software nor to provide
* the user with any updates, revisions, new versions or "bug fixes."
*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package ucar.nc2.iosp.nowrad;
//~--- non-JDK imports --------------------------------------------------------
import ucar.ma2.Array;
import ucar.ma2.DataType;
import ucar.nc2.Attribute;
import ucar.nc2.Dimension;
import ucar.nc2.Variable;
import ucar.nc2.constants.AxisType;
import ucar.nc2.constants.CDM;
import ucar.nc2.constants.FeatureType;
import ucar.nc2.constants._Coordinate;
import ucar.nc2.units.DateFormatter;
import ucar.unidata.geoloc.LatLonPointImpl;
import ucar.unidata.geoloc.ProjectionImpl;
import ucar.unidata.geoloc.ProjectionPointImpl;
import ucar.unidata.geoloc.projection.LambertConformal;
import ucar.unidata.util.Parameter;
import ucar.unidata.util.StringUtil2;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CoderResult;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.TimeZone;
/**
* Created by IntelliJ IDEA.
* User: yuanho
* Date: Feb 10, 2010
* Time: 11:21:19 AM
* To change this template use File | Settings | File Templates.
*/
public class NOWRadheader {
final static int NEXET = 2; // Echo Tops Composite
final static int NEXLH = 5; // Layer Reflectivity - High
final static int NEXLL = 3; // Layer Reflectivity - Low
final static int NEXLM = 4; // Layer Reflectivity - Mid
final static int NEXVI = 6; // Vert. Integrated Liquid Water
final static int NOWRADHF = 0; // 2km Base Reflectivity
final static int USRADHF = 1; // 8km Base Reflectivity
static public String mons[] = {
"JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"
};
final private static boolean useStationDB = false; // use station db for loactions
static private org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(NOWRadheader.class);
DateFormatter formatter = new DateFormatter();
private boolean isR = false;
// private PrintStream out = System.out;
// private Vinfo myInfo;
private String cmemo, ctilt, ctitle, cunit, cname;
private ucar.nc2.NetcdfFile ncfile;
// message header block
// production dessciption block
private boolean noHeader;
private int numX;
private int numY;
private ucar.unidata.io.RandomAccessFile raf;
/**
* check if this file is a nids / tdwr file
* @param raf input file
* @return true if valid
*/
public boolean isValidFile(ucar.unidata.io.RandomAccessFile raf) {
try {
long t = raf.length();
if (t == 0) {
throw new IOException("zero length file ");
}
} catch (IOException e) {
return (false);
}
try {
int p = this.readTop(raf);
if (p == 0) {
return false;
}
} catch (IOException e) {
return (false);
}
return true;
}
/**
* read the header of input file and parsing the NOWRAD part
* @param raf input file
* @return 1 if checking passing
* @throws IOException
*/
int readTop(ucar.unidata.io.RandomAccessFile raf) throws IOException {
int pos = 0;
// long actualSize = 0;
raf.seek(pos);
int readLen = 35;
int rc = 0;
// Read in the contents of the NEXRAD Level III product head
byte[] b = new byte[readLen];
rc = raf.read(b);
if (rc != readLen) {
return 0;
}
// check
if ((convertunsignedByte2Short(b[0]) != 0x00) || (convertunsignedByte2Short(b[1]) != 0xF0)
|| (convertunsignedByte2Short(b[2]) != 0x09)) {
return 0;
}
int hsize = b[3];
String pidd = new String(b, 15, 5);
if (pidd.contains("NOWRA") || pidd.contains("USRAD") || pidd.contains("NEX")) {
return 1;
} else {
return 0;
}
}
public byte[] getData(int offset) throws Exception {
int readLen = (int) raf.length();
byte[] b = new byte[readLen];
int pos = 0;
raf.seek(pos);
int rc = raf.read(b);
return b;
}
// ////////////////////////////////////////////////////////////////////////////////
public void setProperty(String name, String value) {}
/**
* read and parse the header of the nids/tdwr file
* @param raf input file
* @param ncfile output file
* @throws IOException
*/
void read(ucar.unidata.io.RandomAccessFile raf, ucar.nc2.NetcdfFile ncfile) throws Exception {
this.raf = raf;
int rc; /* function return status */
int hoffset = 0;
int readLen = 250;
this.ncfile = ncfile;
int pos = 0;
raf.seek(pos);
byte[] b = new byte[readLen];
rc = raf.read(b);
if (rc != readLen) {
log.warn(" error reading nids product header " + raf.getLocation());
}
int hsize = b[3];
String product = new String(b, 15, 8);
int imgres = b[4 + hsize];
// image lines
String head = new String(b);
//byte[] bt = new byte[] { (byte) 0xF0, (byte) 0x0A };
int t1 = 0 ;
int ii = 0;
for(int i = 0; i < readLen; i++ ){
if(convertunsignedByte2Short(b[i+hsize]) == 0xF0 &&
convertunsignedByte2Short(b[i+1+hsize]) == 0x0A ){
t1 = i + hsize;
ii = i;
break;
}
}
if(t1 == 0)
return;
// if(convertunsignedByte2Short(b[6+hsize]) != 0xF0 ||
// convertunsignedByte2Short(b[7+hsize]) != 0x0A )
// return;
String lstr = trim(new String(b, t1 + 2, 4));
numY = Integer.parseInt(lstr);
String estr = trim(new String(b, t1 + 6, 5));
numX = Integer.parseInt(estr);
//bt = new byte[] { (byte) 0xF0, (byte) 0x03 };
t1 = 0;
for(int i = ii; i < readLen; i++ ){
if(convertunsignedByte2Short(b[i+hsize]) == 0xF0 &&
convertunsignedByte2Short(b[i+1+hsize]) == 0x03 ){
t1 = i + hsize;
ii = i;
break;
}
}
if(t1 == 0)
return;
// if((lstr.length()+estr.length() < 8))
// hsize = hsize -2;
// if(convertunsignedByte2Short(b[18+hsize]) != 0xF0 ||
// convertunsignedByte2Short(b[19+hsize]) != 0x03 )
// return;
String ss = new String(b, t1 + 2, 20);
int off = 0;
if (product.contains("USRADHF")) {
off = 3;
}
// Image time, HHMMSS. The time will be in the form HH:MM, so look :
String ts = new String(b, t1 + 22 + off, 2);
int hr = Integer.parseInt(ts);
ts = new String(b, t1 + 25 + off, 2);
int min = Integer.parseInt(ts);
ts = new String(b, t1 + 28 + off, 2);
int dd = Integer.parseInt(ts);
ts = new String(b, t1 + 31 + off, 3);
String mon = ts;
int month = getMonth(mon);
ts = new String(b, t1 + 35 + off, 2);
int year = Integer.parseInt(ts);
SimpleDateFormat sdf = new SimpleDateFormat();
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
sdf.applyPattern("yyyy/MM/dd HH:mm");
Date date = sdf.parse(year + "/" + month + "/" + dd + " " + hr + ":" + min);
String ot = new String(b, t1 + 40, 45);
//bt = new byte[] { (byte) 0xF0, (byte) 0x0b };
t1 = 0;
for(int i = ii; i < readLen; i++ ){
if(convertunsignedByte2Short(b[i+hsize]) == 0xF0 &&
convertunsignedByte2Short(b[i+1+hsize]) == 0x0b ) {
t1 = i + hsize;
break;
}
}
if(t1 == 0)
return;
// if( convertunsignedByte2Short(b[101 + hsize]) != 0xF0 ||
// convertunsignedByte2Short(b[102 + hsize]) != 0x0b )
// return;
ProjectionImpl projection = null;
if (product.contains("NOWRAD")) {
ot = new String(b, t1 + 2, 68);
//List toks = StringUtil.split(ot, " ", true, true);
String[] toks = StringUtil2.splitString(ot);
String pj = toks[0];
double nav1 = Math.toDegrees(Double.parseDouble(toks[1])); // lon
double nav2 = Math.toDegrees(Double.parseDouble(toks[2])); // lat
double nav3 = Math.toDegrees(Double.parseDouble(toks[3]));
double nav4 = Math.toDegrees(Double.parseDouble(toks[4])); // lat sp
double nav5 = Math.toDegrees(Double.parseDouble(toks[5])); // lon sp
// lower left and upper right corner
float rlat1;
float rlon1;
float rlat2;
float rlon2;
rlat1 = (float) (nav2 - (numY - 1) * nav4);
rlon1 = (float) (nav1 + nav3);
rlat2 = (float) nav2;
rlon2 = (float) (nav1 - nav3);
hoffset = t1 + 71; // 172 + hsize;
// start of the image sequence
if ((convertunsignedByte2Short(b[172 + hsize]) != 0xF0)
|| (convertunsignedByte2Short(b[173 + hsize]) != 0x0c)) {
return;
}
// hoffset = 174 + hsize;
// Set product-dependent information
setProductInfo(product, date);
// data struct
nowrad(hoffset, rlat1, rlon1, rlat2, rlon2, (float) nav4, (float) nav5, date);
} else if (product.contains("USRADHF")) {
ot = new String(b, t1 + 2, 107);
String[] toks = StringUtil2.splitString(ot);
String pj = toks[0];
double nav1 = Math.toDegrees(Double.parseDouble(toks[1])); // standard lat 1
double nav2 = Math.toDegrees(Double.parseDouble(toks[2])); // standard lat 2
double nav3 = Math.toDegrees(Double.parseDouble(toks[3])); // lat. center of proj
double nav4 = Math.toDegrees(Double.parseDouble(toks[4])); // lon. center of proj
double nav5 = Math.toDegrees(Double.parseDouble(toks[5])); // upper left lat
double nav6 = Math.toDegrees(Double.parseDouble(toks[6])); // upper left lon
double nav7 = Math.toDegrees(Double.parseDouble(toks[7])); // lat sp
double nav8 = Math.toDegrees(Double.parseDouble(toks[8])); // lon sp
/* List toks = StringUtil.split(ot, " ", true, true);
String pj = toks.get(0);
double nav1 = Math.toDegrees(Double.parseDouble(toks.get(1))); // standard lat 1
double nav2 = Math.toDegrees(Double.parseDouble(toks.get(2))); // standard lat 2
double nav3 = Math.toDegrees(Double.parseDouble(toks.get(3))); // lat. center of proj
double nav4 = Math.toDegrees(Double.parseDouble(toks.get(4))); // lon. center of proj
double nav5 = Math.toDegrees(Double.parseDouble(toks.get(5))); // upper left lat
double nav6 = Math.toDegrees(Double.parseDouble(toks.get(6))); // upper left lon
double nav7 = Math.toDegrees(Double.parseDouble(toks.get(7))); // lat sp
double nav8 = Math.toDegrees(Double.parseDouble(toks.get(8))); // lon sp */
// lower left and upper right corner
// int offh = 39;
hoffset = t1 + 110; // 172 + hsize+ offh;
// start of the image sequence
if ((convertunsignedByte2Short(b[t1 + 110]) != 0xF0) || (convertunsignedByte2Short(b[t1 + 111]) != 0x0c)) {
return;
}
// Set product-dependent information
setProductInfo(product, date);
// data struct
nowradL(hoffset, (float) nav1, (float) nav2, (float) nav3, (float) nav4, (float) nav5, (float) nav6, date);
}
ncfile.finish();
}
String trim(String str) {
int len = str.length();
StringBuilder ostr = new StringBuilder();
for (int i = 0; i < len; i++) {
char sc = str.charAt(i);
if (Character.isDigit(sc)) {
ostr.append(sc);
}
}
return ostr.toString();
}
int getMonth(String m) {
int i = 0;
while (i < 12) {
if (m.equalsIgnoreCase(mons[i])) {
return i + 1;
} else {
i++;
}
}
return 0;
}
ProjectionImpl nowradL(int hoff, float lat1, float lat2, float clat, float clon, float lat, float lon, Date dd) {
ArrayList dims = new ArrayList();
Dimension dimT = new Dimension("time", 1, true, false, false);
ncfile.addDimension(null, dimT);
String timeCoordName = "time";
Variable taxis = new Variable(ncfile, null, null, timeCoordName);
taxis.setDataType(DataType.DOUBLE);
taxis.setDimensions("time");
taxis.addAttribute(new Attribute(CDM.LONG_NAME, "time since base date"));
taxis.addAttribute(new Attribute(_Coordinate.AxisType, AxisType.Time.toString()));
double[] tdata = new double[1];
tdata[0] = dd.getTime();
Array dataT = Array.factory(DataType.DOUBLE.getPrimitiveClassType(), new int[] { 1 }, tdata);
taxis.setCachedData(dataT, false);
DateFormatter formatter = new DateFormatter();
taxis.addAttribute(new Attribute(CDM.UNITS, "msecs since " + formatter.toDateTimeStringISO(new Date(0))));
ncfile.addVariable(null, taxis);
dims.add(dimT);
Dimension jDim = new Dimension("y", numY, true, false, false);
Dimension iDim = new Dimension("x", numX, true, false, false);
dims.add(jDim);
dims.add(iDim);
ncfile.addDimension(null, iDim);
ncfile.addDimension(null, jDim);
ncfile.addAttribute(null, new Attribute("cdm_data_type", FeatureType.GRID.toString()));
String coordinates = "time y x";
Variable v = new Variable(ncfile, null, null, cname);
v.setDataType(DataType.BYTE);
v.setDimensions(dims);
ncfile.addVariable(null, v);
v.addAttribute(new Attribute(CDM.LONG_NAME, ctitle));
v.addAttribute(new Attribute(CDM.UNITS, cunit));
v.addAttribute( new Attribute(CDM.SCALE_FACTOR, new Float((5.0f))));
v.addAttribute(new Attribute(CDM.MISSING_VALUE, 0));
v.setSPobject(new Vinfo(numX, numY, hoff, false));
v.addAttribute(new Attribute(_Coordinate.Axes, coordinates));
// create coordinate variables
Variable xaxis = new Variable(ncfile, null, null, "x");
xaxis.setDataType(DataType.DOUBLE);
xaxis.setDimensions("x");
xaxis.addAttribute(new Attribute("standard_name", "projection x coordinate"));
xaxis.addAttribute(new Attribute(CDM.UNITS, "km"));
xaxis.addAttribute(new Attribute(_Coordinate.AxisType, "GeoX"));
double[] data1 = new double[numX];
ProjectionImpl projection = new LambertConformal(clat, clon, lat1, lat2);
double ullat = 51.8294;
double ullon = -135.8736;
double lrlat = 17.2454;
double lrlon = -70.1154;
ProjectionPointImpl ptul = (ProjectionPointImpl) projection.latLonToProj(new LatLonPointImpl(ullat, ullon));
ProjectionPointImpl ptlr = (ProjectionPointImpl) projection.latLonToProj(new LatLonPointImpl(lrlat, lrlon));
ProjectionPointImpl ptc = (ProjectionPointImpl) projection.latLonToProj(new LatLonPointImpl(clat, clon));
double startX = ptul.getX();
double startY = ptlr.getY();
double dx = (ptlr.getX() - ptul.getX())/(numX-1);
for (int i = 0; i < numX; i++) {
data1[i] = startX + i*dx;
}
Array dataA = Array.factory(DataType.DOUBLE.getPrimitiveClassType(), new int[] { numX }, data1);
xaxis.setCachedData(dataA, false);
ncfile.addVariable(null, xaxis);
Variable yaxis = new Variable(ncfile, null, null, "y");
yaxis.setDataType(DataType.DOUBLE);
yaxis.setDimensions("y");
yaxis.addAttribute(new Attribute("standard_name", "projection y coordinate"));
yaxis.addAttribute(new Attribute(CDM.UNITS, "km"));
yaxis.addAttribute(new Attribute(_Coordinate.AxisType, "GeoY"));
data1 = new double[numY];
double dy = (ptul.getY() - ptlr.getY())/(numY-1);
for (int i = 0; i < numY; i++) {
data1[i] = startY + i*dy;
}
dataA = Array.factory(DataType.DOUBLE.getPrimitiveClassType(), new int[] { numY }, data1);
yaxis.setCachedData(dataA, false);
ncfile.addVariable(null, yaxis);
// projection
// lower left and upper right corner lat/lons
// modified cylind. equidistant or CED with lat/lon ration != 1
Variable ct = new Variable(ncfile, null, null, projection.getClassName());
ct.setDataType(DataType.CHAR);
ct.setDimensions("");
List params = projection.getProjectionParameters();
for (int i = 0; i < params.size(); i++) {
Parameter p = (Parameter) params.get(i);
ct.addAttribute(new Attribute(p));
}
ct.addAttribute(new Attribute(_Coordinate.TransformType, "Projection"));
//ct.addAttribute(new Attribute(_Coordinate.Axes, "lat lon"));
ct.addAttribute( new Attribute(_Coordinate.Axes, "x y "));
// fake data
dataA = Array.factory(DataType.CHAR.getPrimitiveClassType(), new int[] {});
dataA.setChar(dataA.getIndex(), ' ');
ct.setCachedData(dataA, false);
ncfile.addVariable(null, ct);
return projection;
}
/**
* construct a raster dataset for NIDS raster products;
*
* @return soff -- not used
*/
ProjectionImpl nowrad(int hoff, float rlat1, float rlon1, float rlat2, float rlon2, float dlat, float dlon, Date dd) {
ArrayList dims = new ArrayList();
Dimension dimT = new Dimension("time", 1, true, false, false);
ncfile.addDimension(null, dimT);
String timeCoordName = "time";
Variable taxis = new Variable(ncfile, null, null, timeCoordName);
taxis.setDataType(DataType.DOUBLE);
taxis.setDimensions("time");
taxis.addAttribute(new Attribute(CDM.LONG_NAME, "time since base date"));
taxis.addAttribute(new Attribute(_Coordinate.AxisType, AxisType.Time.toString()));
double[] tdata = new double[1];
tdata[0] = dd.getTime();
Array dataT = Array.factory(DataType.DOUBLE.getPrimitiveClassType(), new int[] { 1 }, tdata);
taxis.setCachedData(dataT, false);
DateFormatter formatter = new DateFormatter();
taxis.addAttribute(new Attribute(CDM.UNITS, "msecs since " + formatter.toDateTimeStringISO(new Date(0))));
ncfile.addVariable(null, taxis);
dims.add(dimT);
Dimension jDim = new Dimension("lat", numY, true, false, false);
Dimension iDim = new Dimension("lon", numX, true, false, false);
dims.add(jDim);
dims.add(iDim);
ncfile.addDimension(null, iDim);
ncfile.addDimension(null, jDim);
ncfile.addAttribute(null, new Attribute("cdm_data_type", FeatureType.GRID.toString()));
String coordinates = "time lat lon";
Variable v = new Variable(ncfile, null, null, cname);
v.setDataType(DataType.BYTE);
v.setDimensions(dims);
ncfile.addVariable(null, v);
v.addAttribute(new Attribute(CDM.LONG_NAME, ctitle));
v.addAttribute( new Attribute(CDM.SCALE_FACTOR, new Float((5.0f))));
v.addAttribute(new Attribute(CDM.MISSING_VALUE, 0));
v.addAttribute(new Attribute(CDM.UNITS, cunit));
v.setSPobject(new Vinfo(numX, numY, hoff, false));
v.addAttribute(new Attribute(_Coordinate.Axes, coordinates));
// create coordinate variables
Variable xaxis = new Variable(ncfile, null, null, "lon");
xaxis.setDataType(DataType.DOUBLE);
xaxis.setDimensions("lon");
xaxis.addAttribute(new Attribute(CDM.LONG_NAME, "longitude"));
xaxis.addAttribute(new Attribute(CDM.UNITS, "degree"));
xaxis.addAttribute(new Attribute(_Coordinate.AxisType, "Lon"));
double[] data1 = new double[numX];
for (int i = 0; i < numX; i++) {
data1[i] = (double) (rlon1 + i * dlon);
}
Array dataA = Array.factory(DataType.DOUBLE.getPrimitiveClassType(), new int[] { numX }, data1);
xaxis.setCachedData(dataA, false);
ncfile.addVariable(null, xaxis);
Variable yaxis = new Variable(ncfile, null, null, "lat");
yaxis.setDataType(DataType.DOUBLE);
yaxis.setDimensions("lat");
yaxis.addAttribute(new Attribute(CDM.LONG_NAME, "latitude"));
yaxis.addAttribute(new Attribute(CDM.UNITS, "degree"));
yaxis.addAttribute(new Attribute(_Coordinate.AxisType, "Lat"));
data1 = new double[numY];
for (int i = 0; i < numY; i++) {
data1[i] = rlat1 + i * dlat;
}
dataA = Array.factory(DataType.DOUBLE.getPrimitiveClassType(), new int[] { numY }, data1);
yaxis.setCachedData(dataA, false);
ncfile.addVariable(null, yaxis);
// projection
// lower left and upper right corner lat/lons
// modified cylind. equidistant or CED with lat/lon ration != 1
/* LatLonProjection llproj = new LatLonProjection("LatitudeLongitudeProjection",
new ProjectionRect(rlat1, rlon1, rlat2, rlon2));
Variable ct = new Variable(ncfile, null, null, llproj.getClassName());
ct.setDataType(DataType.CHAR);
ct.setDimensions("");
List params = llproj.getProjectionParameters();
for (int i = 0; i < params.size(); i++) {
Parameter p = (Parameter) params.get(i);
ct.addAttribute(new Attribute(p));
}
ct.addAttribute(new Attribute(_Coordinate.TransformType, "Projection"));
ct.addAttribute(new Attribute(_Coordinate.Axes, "lat lon"));
// fake data
dataA = Array.factory(DataType.CHAR.getPrimitiveClassType(), new int[] {});
dataA.setChar(dataA.getIndex(), ' ');
ct.setCachedData(dataA, false);
ncfile.addVariable(null, ct);
*/
return null;
}
/**
* parsing the product information into netcdf dataset
*/
void setProductInfo(String prod, Date dd) {
int radial = 0;
String summary = null;
if (prod.contains("NOWRADHF")) {
radial = 0;
cmemo = "NOWRAD Base Reflectivity at Tilt 1";
ctitle = "BREF: Base Reflectivity [dBZ]";
cunit = "dBZ";
cname = "Reflectivity";
summary = "NOWRAD Product";
} else if (prod.contains("USRADHF")) {
radial = 0;
cmemo = "NOWRAD Base Reflectivity at Tilt 1";
ctitle = "BREF: Base Reflectivity [dBZ]";
cunit = "dBZ";
cname = "Reflectivity";
summary = "NOWRAD Product";
} else if (prod.contains("NEXET")) {
radial = 0;
cmemo = "NOWRAD Echo Tops";
ctitle = "Echo Tops Composite";
cunit = "K FT";
cname = "EchoTopsComposite";
summary = "NOWRAD Product";
} else if (prod.contains("NEXLL")) {
radial = 0;
cmemo = "NOWRAD Layer Comp. Reflectivity - Low";
ctitle = "LayerReflectivityLow";
cunit = "dBZ";
cname = "Reflectivity";
summary = "NOWRAD Product";
} else if (prod.contains("NEXLM")) {
radial = 0;
cmemo = "NOWRAD Layer Comp. Reflectivity - Mid";
ctitle = "LayerReflectivityMid";
cunit = "dBZ";
cname = "Reflectivity";
summary = "NOWRAD Product";
} else if (prod.contains("NEXLH")) {
radial = 0;
cmemo = "NOWRAD Layer Comp. Reflectivity - High";
ctitle = "LayerReflectivityHigh";
cunit = "dBZ";
cname = "ReflectivityHigh";
summary = "NOWRAD Product";
} else if (prod.contains("NEXVI")) {
radial = 0;
cmemo = "NOWRAD ";
ctitle = "Vert. Integrated Liquid Water";
cunit = "Knots";
cname = "VILwater";
summary = "NOWRAD ";
} else {
ctilt = "error";
ctitle = "error";
cunit = "error";
cname = "error";
}
/* add geo global att */
ncfile.addAttribute(null, new Attribute("summary", "NOWRAD radar composite products." + summary));
ncfile.addAttribute(null, new Attribute("title", "NOWRAD"));
ncfile.addAttribute(null, new Attribute("keywords", "NOWRAD"));
ncfile.addAttribute(null, new Attribute("creator_name", "NOAA/NWS"));
ncfile.addAttribute(null, new Attribute("creator_url", "http://www.ncdc.noaa.gov/oa/radar/radarproducts.html"));
ncfile.addAttribute(null, new Attribute("naming_authority", "NOAA/NCDC"));
ncfile.addAttribute(null, new Attribute("base_date", formatter.toDateOnlyString(dd)));
ncfile.addAttribute(null, new Attribute("conventions", _Coordinate.Convention));
ncfile.addAttribute(null, new Attribute("cdm_data_type", FeatureType.GRID.toString()));
}
/* thredds global att */
/**
* convert two short into a integer
* @param s1 short one
* @param s2 short two
* @param swapBytes if swap bytes
* @return integer
*/
public static int shortsToInt(short s1, short s2, boolean swapBytes) {
byte[] b = new byte[4];
b[0] = (byte) (s1 >>> 8);
b[1] = (byte) (s1 >>> 0);
b[2] = (byte) (s2 >>> 8);
b[3] = (byte) (s2 >>> 0);
return bytesToInt(b, false);
}
/**
* convert bytes into integer
* @param bytes bytes array
* @param swapBytes if need to swap
* @return integer
*/
public static int bytesToInt(byte[] bytes, boolean swapBytes) {
byte a = bytes[0];
byte b = bytes[1];
byte c = bytes[2];
byte d = bytes[3];
if (swapBytes) {
return ((a & 0xff)) + ((b & 0xff) << 8) + ((c & 0xff) << 16) + ((d & 0xff) << 24);
} else {
return ((a & 0xff) << 24) + ((b & 0xff) << 16) + ((c & 0xff) << 8) + ((d & 0xff));
}
}
/**
* get unsigned integer from byte array
* @param b
* @param num
* @return unsign integer
*/
int getUInt(byte[] b, int num) {
int base = 1;
int i;
int word = 0;
int bv[] = new int[num];
for (i = 0; i < num; i++) {
bv[i] = convertunsignedByte2Short(b[i]);
}
/*
* Calculate the integer value of the byte sequence
*/
for (i = num - 1; i >= 0; i--) {
word += base * bv[i];
base *= 256;
}
return word;
}
/**
* get signed integer from bytes
* @param b
* @param num
* @return
*/
int getInt(byte[] b, int num) {
int base = 1;
int i;
int word = 0;
int bv[] = new int[num];
for (i = 0; i < num; i++) {
bv[i] = convertunsignedByte2Short(b[i]);
}
if (bv[0] > 127) {
bv[0] -= 128;
base = -1;
}
/*
* Calculate the integer value of the byte sequence
*/
for (i = num - 1; i >= 0; i--) {
word += base * bv[i];
base *= 256;
}
return word;
}
/**
* Concatenate two bytes to a 32-bit int value. a is the high order
* byte in the resulting int representation, unless swapBytes is true, in
* which b is the high order byte.
* @param a high order byte
* @param b low order byte
* @param swapBytes byte order swap flag
* @return 32-bit integer
*/
public static int bytesToInt(byte a, byte b, boolean swapBytes) {
// again, high order bit is expressed left into 32-bit form
if (swapBytes) {
return (a & 0xff) + ((int) b << 8);
} else {
return ((int) a << 8) + (b & 0xff);
}
}
/**
* convert unsigned byte to short
* @param b convert this unsigned byte
* @return unsigned short
*/
public short convertunsignedByte2Short(byte b) {
return (short) ((b < 0)
? (short) b + 256
: (short) b);
}
/**
* convert short to unsigned integer
* @param b
* @return unsign integer
*/
public int convertShort2unsignedInt(short b) {
return (b < 0)
? (-1) * b + 32768
: b;
}
/**
* get jave date
* @param julianDays
* @param msecs
* @return java date
*/
static public java.util.Date getDate(int julianDays, int msecs) {
long total = ((long) (julianDays - 1)) * 24 * 3600 * 1000 + msecs;
return new Date(total);
}
/**
* Flush all data buffers to disk.
* @throws IOException
*/
public void flush() throws IOException {
raf.flush();
}
/**
* Close the file.
* @throws IOException
*/
public void close() throws IOException {
if (raf != null) {
raf.close();
}
}
// variable info for reading/writing
class Vinfo {
long hoff; // header offset
boolean isRadial; // is it a radial variable?
int xt;
int yt;
Vinfo(int xt, int yt, long hoff, boolean isRadial) {
this.xt = xt;
this.yt = yt;
this.hoff = hoff;
this.isRadial = isRadial;
}
}
}