edu.wisc.ssec.mcidas

Class LALOnav

java.lang.Object

edu.wisc.ssec.mcidas.AREAnav

edu.wisc.ssec.mcidas.LALOnav

All Implemented Interfaces:

java.io.Serializable

public final class LALOnav
extends AREAnav

Navigation class for Radar (RECT) type nav. This code was modified from the original FORTRAN code (nvxrect.dlm) on the McIDAS system. It only supports latitude/longitude to line/element transformations (LL) and vice/versa. Transform to 'XYZ' not implemented.

See Also:

McIDAS Programmer's Manual, Serialized Form

Field Summary

Fields inherited from class edu.wisc.ssec.mcidas.AREAnav

ABIN, ABIS, DEGREES_TO_RADIANS, DMSP, GEOS, GMSX, GOES, GVAR, indexEle, indexLat, indexLine, indexLon, KALP, LALO, LAMB, LL, MERC, MOLL, MSAT, MSG, MSGT, POES, PS, RADIANS_TO_DEGREES, RADR, RECT, SIN, TANC, XY

Constructor Summary

Constructors

Constructor and Description
LALOnav(int[] iparms, int[] auxBlock) Set up for the real math work.

Method Summary

Modifier and Type	Method and Description
double[][]	toLatLon(double[][] linele) converts from satellite coordinates to latitude/longitude
float[][]	toLatLon(float[][] linele) converts from satellite coordinates to latitude/longitude
double[][]	toLinEle(double[][] latlon) toLinEle converts lat/long to satellite line/element
float[][]	toLinEle(float[][] latlon) toLinEle converts lat/long to satellite line/element transform an array of values in R^DomainDimension to an array of non-integer grid coordinates

Methods inherited from class edu.wisc.ssec.mcidas.AREAnav

areaCoordToImageCoord, areaCoordToImageCoord, areaCoordToImageCoord, areaCoordToImageCoord, canApproximateWithSpline, doubleToFloat, equals, floatToDouble, getLineOffset, getSubpoint, imageCoordToAreaCoord, imageCoordToAreaCoord, imageCoordToAreaCoord, imageCoordToAreaCoord, isFlippedLineCoordinates, makeAreaNav, makeAreaNav, setFlipLineCoordinates, setImageStart, setMag, setMag, setRes, setRes, setStart, toString

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LALOnav

public LALOnav(int[] iparms,
               int[] auxBlock)
        throws java.lang.IllegalArgumentException

Set up for the real math work. Must pass in the int array of the RECT nav 'codicil'.

Parameters:

iparms - the nav block from the image file

Throws:

java.lang.IllegalArgumentException - if the nav block is not a RECT type.

Method Detail

toLatLon

public float[][] toLatLon(float[][] linele)

converts from satellite coordinates to latitude/longitude

Overrides:

toLatLon in class AREAnav

Parameters:

linele - array of line/element pairs. Where linele[indexLine][] is a 'line' and linele[indexEle][] is an element. These are in 'file' coordinates (not "image" coordinates.)

Returns:

latlon[][] array of lat/long pairs. Output array is latlon[indexLat][] of latitudes and latlon[indexLon][] of longitudes. this code cobbled from McIDAS laloutil.c

toLatLon

public double[][] toLatLon(double[][] linele)

Description copied from class: AREAnav

converts from satellite coordinates to latitude/longitude

Specified by:

toLatLon in class AREAnav

Parameters:

linele - array of line/element pairs. Where linele[indexLine][] is a 'line' and linele[indexEle][] is an element. These are in 'file' coordinates (not "image" coordinates.)

Returns:

latlon[][] array of lat/long pairs. Output array is latlon[indexLat][] of latitudes and latlon[indexLon][] of longitudes.

toLinEle

public float[][] toLinEle(float[][] latlon)

toLinEle converts lat/long to satellite line/element transform an array of values in R^DomainDimension to an array of non-integer grid coordinates

Overrides:

toLinEle in class AREAnav

Parameters:

latlon - array of lat/long pairs. Where latlon[indexLat][] are latitudes and latlon[indexLon][] are longitudes.

Returns:

linele[][] array of line/element pairs. Where linele[indexLine][] is a line and linele[indexEle][] is an element. These are in 'file' coordinates (not "image" coordinates);

toLinEle

public double[][] toLinEle(double[][] latlon)

Description copied from class: AREAnav

toLinEle converts lat/long to satellite line/element

Specified by:

toLinEle in class AREAnav

Parameters:

latlon - array of lat/long pairs. Where latlon[indexLat][] are latitudes and latlon[indexLon][] are longitudes.

Returns:

linele[][] array of line/element pairs. Where linele[indexLine][] is a line and linele[indexEle][] is an element. These are in 'file' coordinates (not "image" coordinates);