ucar.atd.dorade.DoradeSweep Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cdm Show documentation
Show all versions of cdm 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 1998-2014 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.atd.dorade;
import ucar.atd.dorade.DoradeDescriptor.DescriptorException;
import ucar.nc2.constants.CDM;
import java.io.RandomAccessFile;
import java.io.IOException;
import java.util.Date;
public class DoradeSweep {
/**
* Bad data value flag
*
* @see #getRayData
*/
public static final float BAD_VALUE = DoradePARM.BAD_VALUE;
DoradeSSWB mySSWB;
DoradeVOLD myVOLD;
DoradeSWIB mySWIB;
boolean littleEndian;
public static class DoradeSweepException extends IOException {
protected DoradeSweepException(String message) {
super(message);
}
protected DoradeSweepException(Exception ex) {
super(ex);
}
}
public static class MovingSensorException extends IOException {
protected MovingSensorException(String message) {
super(message);
}
protected MovingSensorException(Exception ex) {
super(ex);
}
}
/**
* Construct a DoradeSweep using the named DORADE sweep file.
*
* @param filename the DORADE sweepfile to load
* @throws DoradeSweepException
* @throws java.io.FileNotFoundException
*/
public DoradeSweep(String filename)
throws DoradeSweepException, java.io.FileNotFoundException {
try (RandomAccessFile file = new RandomAccessFile(filename, "r")) {
littleEndian = DoradeDescriptor.sweepfileIsLittleEndian(file);
mySSWB = new DoradeSSWB(file, littleEndian);
myVOLD = new DoradeVOLD(file, littleEndian);
mySWIB = new DoradeSWIB(file, littleEndian, myVOLD);
} catch (Exception ex) {
throw new DoradeSweepException(ex);
}
}
public DoradeSweep(RandomAccessFile file)
throws DoradeSweepException, java.io.FileNotFoundException {
//file = new RandomAccessFile(filename, "r");
try {
littleEndian = DoradeDescriptor.sweepfileIsLittleEndian(file);
mySSWB = new DoradeSSWB(file, littleEndian);
myVOLD = new DoradeVOLD(file, littleEndian);
mySWIB = new DoradeSWIB(file, littleEndian, myVOLD);
} catch (Exception ex) {
throw new DoradeSweepException(ex);
}
}
/**
* Is this sweepfile little-endian?
*
* @return a boolean indicating whether the file is little-endian
*/
public boolean isLittleEndian() {
return littleEndian;
}
/**
* Get the array of available parameters.
*
* @return the array of available parameters
*/
public DoradePARM[] getParamList() {
return myVOLD.getParamList();
}
/**
* Get the parameter descriptor with the given name, ignoring case.
* If no such descriptor exists, null is returned.
*
* @param name the name of the desired parameter
* @return the DoradePARM from this sweep with the given name,
* or null if no such parameter exists.
*/
public DoradePARM lookupParamIgnoreCase(String name) {
DoradePARM[] list = getParamList();
for (DoradePARM aList : list) {
if (aList.getName().equalsIgnoreCase(name))
return aList;
}
return null;
}
/**
* Get the number of rays in this sweep.
*
* @return the number of rays in the sweep
*/
public int getNRays() {
return mySWIB.getNRays();
}
/**
* Get the number of sensors associated with this sweep.
*
* @return the number of sensors associated with the sweep
*/
public int getNSensors() {
return myVOLD.getNSensors();
}
/**
* Get the name of a selected sensor.
*
* @param which the index of the sensor of interest
* @return the name of the sensor
* @see #getNSensors
*/
public String getSensorName(int which) {
return myVOLD.getSensorName(which);
}
/**
* Return whether the selected sensor is moving.
*
* @param which the index of the sensor of interest
* @return whether the selected sensor is moving
* @throws DoradeSweepException
* @see #getNSensors
*/
public boolean sensorIsMoving(int which) throws DoradeSweepException {
try {
getLatitude(which);
getLongitude(which);
getAltitude(which);
} catch (MovingSensorException mpex) {
return true;
}
return false;
}
/**
* Get the sensor latitude for a non-moving sensor
*
* @param which the index of the sensor of interest
* @return static latitude in degrees
* @throws MovingSensorException if the sensor is moving
* @see #getLatitudes
* @see #sensorIsMoving
* @see #getNSensors
*/
public float getLatitude(int which) throws MovingSensorException {
//
// Look for per-ray latitudes first. Return the fixed sensor latitude
// if no per-ray positions are available.
//
float[] lats = mySWIB.getLatitudes();
if (lats == null)
return myVOLD.getRADD(which).getLatitude();
//
// We have per-ray locations. Loop through them, and return
// null if this is not a static platform
//
for (int r = 1; r < lats.length; r++)
if (lats[r] != lats[0])
throw new MovingSensorException("sensor is not static");
return lats[0];
}
/**
* Get the sensor longitude for a non-moving sensor
*
* @param which the index of the sensor of interest
* @return static longitude in degrees
* @throws MovingSensorException if the sensor is moving
* @see #getLongitudes
* @see #sensorIsMoving
* @see #getNSensors
*/
public float getLongitude(int which) throws MovingSensorException {
//
// Look for per-ray longitudes first. Return the fixed sensor longitude
// if no per-ray positions are available.
//
float[] lons = mySWIB.getLongitudes();
if (lons == null)
return myVOLD.getRADD(which).getLongitude();
//
// We have per-ray locations. Loop through them, and return
// null if this is not a static platform
//
for (int r = 1; r < lons.length; r++)
if (lons[r] != lons[0])
throw new MovingSensorException("sensor is not static");
return lons[0];
}
/**
* Get the sensor altitude for a non-moving sensor
*
* @param which the index of the sensor of interest
* @return static altitude in km MSL
* @throws MovingSensorException if the sensor is moving
* @see #getAltitudes
* @see #sensorIsMoving
* @see #getNSensors
*/
public float getAltitude(int which) throws MovingSensorException {
//
// Look for per-ray altitudes first. Return the fixed sensor altitude
// if no per-ray positions are available.
//
float[] alts = mySWIB.getAltitudes();
if (alts == null)
return myVOLD.getRADD(which).getAltitude();
//
// We have per-ray locations. Loop through them, and return
// null if this is not a static platform
//
for (int r = 1; r < alts.length; r++)
if (alts[r] != alts[0])
throw new MovingSensorException("sensor is not static");
return alts[0];
}
/**
* Get the per-ray array of sensor latitudes.
*
* @param which the index of the sensor of interest
* @return a per-ray array of sensor latitudes
* @see #getLatitude
* @see #getNSensors
*/
public float[] getLatitudes(int which) {
//
// Try for per-ray location information.
//
float[] lats = mySWIB.getLatitudes();
//
// If we don't have per-ray location information, just replicate
// the sensor fixed latitude.
//
if (lats == null) {
float fixedLat = myVOLD.getRADD(which).getLatitude();
lats = new float[getNRays()];
for (int r = 0; r < getNRays(); r++)
lats[r] = fixedLat;
}
return lats;
}
/**
* Get the per-ray array of sensor longitudes.
*
* @param which the index of the sensor of interest
* @return a per-ray array of sensor longitudes
* @see #getLongitude
* @see #getNSensors
*/
public float[] getLongitudes(int which) {
//
// Try for per-ray location information.
//
float[] lons = mySWIB.getLongitudes();
//
// If we don't have per-ray location information, just replicate
// the sensor fixed latitude.
//
if (lons == null) {
float fixedLon = myVOLD.getRADD(which).getLongitude();
lons = new float[getNRays()];
for (int r = 0; r < getNRays(); r++)
lons[r] = fixedLon;
}
return lons;
}
/**
* Get the per-ray array of sensor altitudes.
*
* @param which the index of the sensor of interest
* @return a per-ray array of sensor altitudes
* @see #getAltitude
* @see #getNSensors
* @see #getNRays
*/
public float[] getAltitudes(int which) {
//
// Try for per-ray location information.
//
float[] alts = mySWIB.getAltitudes();
//
// If we don't have per-ray location information, just replicate
// the sensor fixed altitude.
//
if (alts == null) {
float fixedAlt = myVOLD.getRADD(which).getAltitude();
alts = new float[getNRays()];
for (int r = 0; r < getNRays(); r++)
alts[r] = fixedAlt;
}
return alts;
}
/**
* Get the fixed angle for this sweep.
*
* @return the fixed angle of the sweep, in degrees
*/
public float getFixedAngle() {
return mySWIB.getFixedAngle();
}
// unidata added
public int getSweepNumber() {
return mySWIB.getSweepNumber();
}
/**
* Get the (start) time for this sweep.
*
* @return the start time of the sweep
*/
public Date getTime() {
return mySSWB.getStartTime();
}
// unidata added
public Date[] getTimes() {
return mySWIB.getTimes();
}
// unidata added
public Date getRayTime(int ray) {
return mySWIB.getRayTime(ray);
}
/**
* Get the array of data for the given parameter and ray.
*
* @param param the parameter of interest
* @param ray the index of the ray of interest
* @return an array containing unpacked values for every cell for the given
* parameter and ray. Cells having bad or missing data will hold the
* value BAD_VALUE
* @throws DoradeSweepException
* @see #getNCells
* @see #getNRays
* @see #BAD_VALUE
*/
public float[] getRayData(DoradePARM param, int ray)
throws DoradeSweepException {
return getRayData(param, ray, null);
}
/**
* Get the array of data for the given parameter and ray.
*
* @param param the parameter of interest
* @param ray the index of the ray of interest
* @param workingArray If non-null and the same length as what is needed use this instead.
* @return an array containing unpacked values for every cell for the given
* parameter and ray. Cells having bad or missing data will hold the
* value BAD_VALUE
* @throws DoradeSweepException
* @see #getNCells
* @see #getNRays
* @see #BAD_VALUE
*/
public float[] getRayData(DoradePARM param, int ray, float[] workingArray)
throws DoradeSweepException {
try {
return mySWIB.getRayData(param, ray, workingArray);
} catch (DescriptorException ex) {
throw new DoradeSweepException(ex);
}
}
/**
* Get the range to the leading edge of the first cell for the given sensor.
*
* @param which index of the sensor of interest
* @return range to the leading edge of the first cell for the given sensor,
* in meters
* @see #getNSensors
*/
public float getRangeToFirstCell(int which) {
return myVOLD.getRADD(which).getRangeToFirstCell();
}
/**
* Return the cell spacing for the given sensor, if constant, otherwise
* return -1
*
* @param which index of the sensor of interest
* @return the constant cell spacing in meters, or -1 if the cell spacing
* varies
* @see #getNSensors
*/
public float getCellSpacing(int which) {
try {
return myVOLD.getRADD(which).getCellSpacing();
} catch (DescriptorException ex) {
return -1;
}
}
/**
* Get the number of data cells (gates) per ray for the given sensor.
*
* @param which index of the sensor of interest
* @return the number of cells per ray for the given sensor
* @see #getNSensors
*/
public int getNCells(int which) {
return myVOLD.getRADD(which).getNCells();
}
public short getVolumnNumber() {
return myVOLD.getVolumeNumber();
}
public String getProjectName() {
return myVOLD.getProjectName();
}
/**
* Get the azimuths for all rays in the sweep.
*
* @return array of azimuths for all rays in the sweep, in degrees
* @see #getNRays
*/
public float[] getAzimuths() {
return mySWIB.getAzimuths();
}
/**
* Get the elevations for all rays in the sweep.
*
* @return array of elevations for all rays in the sweep, in degrees
* @see #getNRays
*/
public float[] getElevations() {
return mySWIB.getElevations();
}
/**
* Return a string with a reasonable representation in UTC of the
* given Date.
*
* @param date Date to be represented
* @return a string containing a UTC representation of the date
*/
public static String formatDate(Date date) {
return DoradeDescriptor.formatDate(date);
}
/**
* DoradeSweep class test method. Usage:
*
* $ java ucar.atd.dorade.DoradeSweep <DORADE_sweepfile>
*
*/
public static void main(String[] args) {
try {
if (args.length == 0) {
System.err.println("Usage: DoradeSweep ");
System.exit(1);
}
DoradeSweep sweepfile = new DoradeSweep(args[0]);
DoradePARM[] params = sweepfile.getParamList();
System.out.println(params.length + " params in file");
for (DoradePARM param : params) mainGetParam(sweepfile, param);
} catch (Exception ex) {
ex.printStackTrace();
}
}
private static void mainGetParam(DoradeSweep sweepfile, DoradePARM param) throws DoradeSweepException {
System.out.print("getting " + param.getName());
for (int r = 0; r < sweepfile.getNRays(); r++) {
float[] vals = sweepfile.getRayData(param, r);
int nCells = vals.length;
if (r == 0)
System.out.println(" (" + nCells + " cells x " +
sweepfile.getNRays() + " rays)");
}
}
public ScanMode getScanMode() {
return myVOLD.getRADD(0).getScanMode();
}
// unidata added
public static boolean isDoradeSweep(RandomAccessFile file) throws DoradeSweepException {
try {
if (findName(file, "SSWB"))
return true;
} catch (Exception ex) {
throw new DoradeSweepException(ex);
}
return false;
}
// Unidata added: finding the first 4 byte for string matching
private static boolean findName(RandomAccessFile file, String expectedName) throws IOException {
byte[] nameBytes = new byte[4];
//try {
long filepos = file.getFilePointer();
file.seek(0);
if (file.read(nameBytes, 0, 4) == -1)
return false; // EOF
file.seek(filepos);
//} catch (Exception ex) {
// throw new IOException();
//}
return expectedName.equals(new String(nameBytes, CDM.utf8Charset));
}
// unidata added
public ScanMode getScanMode(int which) {
return myVOLD.getRADD(which).getScanMode();
}
// unidata added
public float getUnambiguousVelocity(int which) {
return myVOLD.getRADD(which).getUnambiguousVelocity();
}
//unidata added
public float getunambiguousRange(int which) {
return myVOLD.getRADD(which).getunambiguousRange();
}
// unidata added
public float getradarConstant(int which) {
return myVOLD.getRADD(which).getradarConstant();
}
// unidata added
public float getrcvrGain(int which) {
return myVOLD.getRADD(which).getrcvrGain();
}
// unidata added
public float getantennaGain(int which) {
return myVOLD.getRADD(which).getantennaGain();
}
// unidata added
public float getsystemGain(int which) {
return myVOLD.getRADD(which).getsystemGain();
}
// unidata added
public float gethBeamWidth(int which) {
return myVOLD.getRADD(which).gethBeamWidth();
}
// unidata added
public float getpeakPower(int which) {
return myVOLD.getRADD(which).getpeakPower();
}
// unidata added
public float getnoisePower(int which) {
return myVOLD.getRADD(which).getnoisePower();
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy