ucar.unidata.geoloc.vertical
Class HybridSigmaPressure

java.lang.Object
  ucar.unidata.geoloc.vertical.VerticalTransformImpl
      ucar.unidata.geoloc.vertical.HybridSigmaPressure

All Implemented Interfaces:

VerticalTransform

public class HybridSigmaPressure
extends VerticalTransformImpl

Create a 3D height(z,y,x) array using the netCDF CF convention formula for "Hybrid Sigma Pressure".

pressure(x,y,z) = a(z)*p0 + b(z)*surfacePressure(x,y) or

pressure(x,y,z) = ap(z) + b(z)*surfacePressure(x,y)

Author:

caron

See Also:

http://cf-pcmdi.llnl.gov/

Field Summary

static java.lang.String	A The "a" variable name identifier
static java.lang.String	AP The "a" variable name identifier
static java.lang.String	B The "b" variable name identifier
static java.lang.String	P0 P-naught identifier
static java.lang.String	PS Surface pressure name identifier

Constructor Summary

HybridSigmaPressure(NetcdfFile ds, Dimension timeDim, java.util.List<ucar.unidata.util.Parameter> params)
Construct a coordinate transform for sigma pressure

Method Summary

ArrayDouble.D3

getCoordinateArray(int timeIndex) Get the 3D vertical coordinate array for this time step.

Methods inherited from class ucar.unidata.geoloc.vertical.VerticalTransformImpl

getUnitString, isTimeDependent, subset

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

P0

public static final java.lang.String P0

P-naught identifier

See Also:

Constant Field Values

PS

public static final java.lang.String PS

Surface pressure name identifier

See Also:

Constant Field Values

A

public static final java.lang.String A

The "a" variable name identifier

See Also:

Constant Field Values

AP

public static final java.lang.String AP

The "a" variable name identifier

See Also:

Constant Field Values

B

public static final java.lang.String B

The "b" variable name identifier

See Also:

Constant Field Values

Constructor Detail

HybridSigmaPressure

public HybridSigmaPressure(NetcdfFile ds,
                           Dimension timeDim,
                           java.util.List<ucar.unidata.util.Parameter> params)

Construct a coordinate transform for sigma pressure

Parameters:

ds - netCDF dataset

timeDim - time dimension

params - list of transformation Parameters

Method Detail

getCoordinateArray

public ArrayDouble.D3 getCoordinateArray(int timeIndex)
                                  throws java.io.IOException,
                                         InvalidRangeException

Get the 3D vertical coordinate array for this time step.

Specified by:

getCoordinateArray in interface VerticalTransform

Specified by:

getCoordinateArray in class VerticalTransformImpl

Parameters:

timeIndex - the time index. Ignored if !isTimeDependent().

Returns:

vertical coordinate array

Throws:

java.io.IOException - problem reading data

InvalidRangeException - _more_