edu.wisc.ssec.mcidas
Class TANCnav

java.lang.Object
  edu.wisc.ssec.mcidas.AREAnav
      edu.wisc.ssec.mcidas.TANCnav

All Implemented Interfaces:

Serializable

public final class TANCnav

extends AREAnav

Navigation class for tangent cone (TANC) type nav. This code was modified from the original FORTRAN code (nvxtanc.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

(package private) double	coscl
(package private) double	ele0
(package private) int	ihem
(package private) int	iwest
(package private) double	lat0
(package private) double	lin0
(package private) double	lon0
(package private) double	mxtheta
(package private) double	scale
(package private) double	tancl
(package private) double	tancl2

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

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

Constructor Summary

TANCnav(int[] iparms)
Set up for the real math work.

Method Summary

double[][]	toLatLon(double[][] linele) converts from satellite coordinates to latitude/longitude
double[][]	toLinEle(double[][] latlon) toLinEle converts lat/long to satellite line/element

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

areaCoordToImageCoord, areaCoordToImageCoord, areaCoordToImageCoord, areaCoordToImageCoord, doubleToFloat, equals, floatToDouble, getLineOffset, imageCoordToAreaCoord, imageCoordToAreaCoord, imageCoordToAreaCoord, imageCoordToAreaCoord, isFlippedLineCoordinates, makeAreaNav, makeAreaNav, setFlipLineCoordinates, setImageStart, setMag, setMag, setRes, setRes, setStart, toLatLon, toLinEle, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

iwest

int iwest

ihem

int ihem

lin0

double lin0

ele0

double ele0

scale

double scale

lon0

double lon0

lat0

double lat0

coscl

double coscl

tancl

double tancl

tancl2

double tancl2

mxtheta

double mxtheta

Constructor Detail

TANCnav

public TANCnav(int[] iparms)
        throws IllegalArgumentException

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

Parameters:

iparms - the nav block from the image file

Throws:

IllegalArgumentException - if the nav block is not a TANC type or the parameters are bogus

Method Detail

toLatLon

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

converts from satellite coordinates to latitude/longitude

Specified by:

toLatLon in class AREAnav

Returns:

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

toLinEle

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

toLinEle converts lat/long to satellite line/element

Specified by:

toLinEle in class AREAnav

Returns:

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