/*
* Copyright 1998-2009 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
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* 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
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package ucar.nc2.dataset.conv;
import ucar.nc2.*;
import ucar.nc2.util.CancelTask;
import ucar.nc2.constants.AxisType;
import ucar.nc2.constants._Coordinate;
import ucar.nc2.dataset.*;
import ucar.ma2.DataType;
import ucar.ma2.ArrayLong;
import java.util.List;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.TimeZone;
import java.io.IOException;
/**
* Class Description.
*
* @author caron
* @since Jan 26, 2009
*/
public class ModisSatellite extends ucar.nc2.dataset.CoordSysBuilder {
public static boolean isMine(NetcdfFile ncfile) {
String satName = ncfile.findAttValueIgnoreCase(null, "SATNAME", null);
if ((satName == null) || !(satName.equalsIgnoreCase("Aqua")))
return false;
String instName = ncfile.findAttValueIgnoreCase(null, "INTRUMENT_NAME", null);
if ((instName == null) || !(instName.equalsIgnoreCase("modis")))
return false;
return true;
}
public ModisSatellite() {
this.conventionName = "ModisSatellite";
}
public void augmentDataset( NetcdfDataset ds, CancelTask cancelTask) throws IOException {
for (Variable v : ds.getVariables())
checkIfAxis(v);
int year = ds.readAttributeInteger(null, "YEAR", -1);
int doy = ds.readAttributeInteger(null, "DAY", -1);
double time = ds.readAttributeDouble(null, "TIME", Double.NaN);
if ((year >0) && (doy > 0) && !Double.isNaN(time)) {
Calendar cal = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
cal.clear();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.DAY_OF_YEAR, doy);
int hour = (int) time;
cal.set(Calendar.HOUR_OF_DAY, hour);
time -= hour;
time *= 60;
int minute = (int) time;
cal.set(Calendar.MINUTE, minute);
time -= minute;
time *= 60;
cal.set(Calendar.SECOND, (int) time);
VariableDS var = new VariableDS(ds, null, null, "timeFromAtts", DataType.LONG, "",
"seconds since 1970-01-01 00:00", "time generated from global attributes");
// LOOK : cant handle scalar coordinates yet
// var.addAttribute( new Attribute(_Coordinate.AxisType, AxisType.Time.toString()));
ds.addVariable(null, var);
ArrayLong.D0 data = new ArrayLong.D0();
data.set(cal.getTime().getTime()/1000);
var.setCachedData(data, true);
}
ds.finish();
}
private void checkIfAxis(Variable v) {
String name = v.getShortName();
if (name.equalsIgnoreCase("Longitude"))
v.addAttribute( new Attribute(_Coordinate.AxisType, AxisType.Lon.toString()));
else if (name.equalsIgnoreCase("Latitude"))
v.addAttribute( new Attribute(_Coordinate.AxisType, AxisType.Lat.toString()));
}
}