java.lang.Object
- ucar.unidata.geoloc.projection.sat.GEOSTransform

public class GEOSTransform
extends Object

Geostationary Transform

Since:: 08/28/2014

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`GEOS`
`static String`	`GOES`
`ucar.unidata.geoloc.projection.sat.GEOSTransform.Geoid`	`grs80`
`static String`	`GRS80`
`String`	`scan_geom`
`ucar.unidata.geoloc.projection.sat.GEOSTransform.Geoid`	`wgs84`
`static String`	`WGS84`

Constructor Summary

Constructors
Constructor	Description
`GEOSTransform()`
`GEOSTransform(double subLonDegrees)`
`GEOSTransform(double subLonDegrees, double perspective_point_height, double semi_minor_axis, double semi_major_axis, double inverse_flattening, String sweep_angle_axis)`
`GEOSTransform(double subLonDegrees, double perspective_point_height, double semi_minor_axis, double semi_major_axis, String sweep_angle_axis)`
`GEOSTransform(double subLonDegrees, String scan_geom)`
`GEOSTransform(double subLonDegrees, String scan_geom, String geoidID)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int[]`	`earthToElemLine(double geographic_lon, double geographic_lat, double scale_x, double offset_x, double scale_y, double offset_y)`	Transform pixel center Earth coordinates (lon,lat) to integer FGF coordinates.
`double[]`	`earthToFGF(double geographic_lon, double geographic_lat, double scale_x, double offset_x, double scale_y, double offset_y)`	Transform Earth coordinates (lon,lat) to fractional FGF coordinates.
`double[]`	`earthToSat(double geographic_lon, double geographic_lat)`	Transform geographic Earth coordinates to satellite view angle coordinate system also known as the "intermediate" coordinate system in CGMS Normalized Geostationary Projection.
`double[]`	`elemLineToEarth(int elem, int line, double scale_x, double offset_x, double scale_y, double offset_y)`	Transform integer FGF coordinates to (longitude, latitude) of pixel center The (i,j) pixel, zero-based, refers to the pixel center.
`boolean`	`equals(Object o)`
`double[]`	`FGFtoEarth(double fgf_x, double fgf_y, double scale_x, double offset_x, double scale_y, double offset_y)`	Transform fractional FGF coordinates to (longitude, latitude).
`double[]`	`FGFtoSat(double fgf_x, double fgf_y, double scale_x, double offset_x, double scale_y, double offset_y)`	Transform fractional FGF coordinates to (lamda, theta) radians.
`double[]`	`GOES_to_GEOS(double lamda_goes, double theta_goes)`	Transform view angle coordinates in the GOES scan geometry frame to view angle coordinates in the GEOS scan geometry frame.
`int`	`hashCode()`
`double[]`	`satToEarth(double x, double y)`	Transform satellite view angle coordinates, known as the "intermeidate" coordinates in the CGMS Normalized Geostationary Projection, to geographic Earth coordinates.
`double[]`	`SatToFGF(double lamda, double theta, double scale_x, double offset_x, double scale_y, double offset_y)`	Transform (lamda, theta) in radians to fractional FGF coordinates.
`static String`	`scanGeomToSweepAngleAxis(String scanGeometry)`	Find sweep_angle_axis associated with a scan geometry
`static String`	`sweepAngleAxisToScanGeom(String sweepAngleAxis)`	Find scan geometry associated with sweep_angle_axis

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - GOES
```
public static final String GOES
```
    See Also:
    
    Constant Field Values
  - GEOS
```
public static final String GEOS
```
    See Also:
    
    Constant Field Values
  - WGS84
```
public static final String WGS84
```
    See Also:
    
    Constant Field Values
  - GRS80
```
public static final String GRS80
```
    See Also:
    
    Constant Field Values
  - wgs84
```
public final ucar.unidata.geoloc.projection.sat.GEOSTransform.Geoid wgs84
```
  - grs80
```
public final ucar.unidata.geoloc.projection.sat.GEOSTransform.Geoid grs80
```
  - scan_geom
```
public String scan_geom
```
- Constructor Detail
  - GEOSTransform
```
public GEOSTransform()
```
  - GEOSTransform
```
public GEOSTransform(double subLonDegrees)
```
  - GEOSTransform
```
public GEOSTransform(double subLonDegrees,
                     String scan_geom)
```
  - GEOSTransform
```
public GEOSTransform(double subLonDegrees,
                     String scan_geom,
                     String geoidID)
```
  - GEOSTransform
```
public GEOSTransform(double subLonDegrees,
                     double perspective_point_height,
                     double semi_minor_axis,
                     double semi_major_axis,
                     double inverse_flattening,
                     String sweep_angle_axis)
```
  - GEOSTransform
```
public GEOSTransform(double subLonDegrees,
                     double perspective_point_height,
                     double semi_minor_axis,
                     double semi_major_axis,
                     String sweep_angle_axis)
```
- Method Detail
  - earthToSat
```
public double[] earthToSat(double geographic_lon,
                           double geographic_lat)
```
    Transform geographic Earth coordinates to satellite view angle coordinate system also known as the "intermediate" coordinate system in CGMS Normalized Geostationary Projection.
    
    Parameters:
    
    geographic_lon - longitude, units: degrees
    
    geographic_lat - latitude, units: degrees
    
    Returns:
    
    (lamda, theta) units: radian. This is the (x,y) or (East-West, North_South) view angle.
  - satToEarth
```
public double[] satToEarth(double x,
                           double y)
```
    Transform satellite view angle coordinates, known as the "intermeidate" coordinates in the CGMS Normalized Geostationary Projection, to geographic Earth coordinates.
    
    Parameters:
    
    x - is lamda (East-West) angle, units: radians
    
    y - is theta (Norht-South) angle, units: radians
    
    Returns:
    
    (Longitude, Latitude), units degrees
  - GOES_to_GEOS
```
public double[] GOES_to_GEOS(double lamda_goes,
                             double theta_goes)
```
    Transform view angle coordinates in the GOES scan geometry frame to view angle coordinates in the GEOS scan geometry frame.
  - FGFtoEarth
```
public double[] FGFtoEarth(double fgf_x,
                           double fgf_y,
                           double scale_x,
                           double offset_x,
                           double scale_y,
                           double offset_y)
```
    Transform fractional FGF coordinates to (longitude, latitude).
    
    Parameters:
    
    fgf_x - fractional FGF coordinate, zero-based
    
    fgf_y - fractional FGF coordinate, zero-based
    
    scale_x - scaleFactor from the x coordinate variable
    
    offset_x - addOffset from the x coordinate variable
    
    scale_y - scaleFactor from the y coordinate variable
    
    offset_y - addOffset from the y coordinate variable
    
    Returns:
    
    (Longitude, Latitude), units: degrees
  - FGFtoSat
```
public double[] FGFtoSat(double fgf_x,
                         double fgf_y,
                         double scale_x,
                         double offset_x,
                         double scale_y,
                         double offset_y)
```
    Transform fractional FGF coordinates to (lamda, theta) radians.
    
    Parameters:
    
    fgf_x - fractional FGF coordinate, zero-based
    
    fgf_y - fractional FGF coordinate, zero-based
    
    scale_x - scaleFactor from the x coordinate variable
    
    offset_x - addOffset from the x coordinate variable
    
    scale_y - scaleFactor from the y coordinate variable
    
    offset_y - addOffset from the y coordinate variable
    
    Returns:
    
    (lamda, theta), units: radians
  - elemLineToEarth
```
public double[] elemLineToEarth(int elem,
                                int line,
                                double scale_x,
                                double offset_x,
                                double scale_y,
                                double offset_y)
```
    Transform integer FGF coordinates to (longitude, latitude) of pixel center The (i,j) pixel, zero-based, refers to the pixel center.
    
    Parameters:
    
    scale_x - scaleFactor from the x coordinate variable
    
    offset_x - addOffset from the x coordinate variable
    
    scale_y - scaleFactor from the y coordinate variable
    
    offset_y - addOffset from the y coordinate variable
    
    Returns:
    
    (Longitude, Latitude), units: degrees, of FGF (i,j) pixel center
  - earthToFGF
```
public double[] earthToFGF(double geographic_lon,
                           double geographic_lat,
                           double scale_x,
                           double offset_x,
                           double scale_y,
                           double offset_y)
```
    Transform Earth coordinates (lon,lat) to fractional FGF coordinates.
    
    Parameters:
    
    geographic_lon - Longitude, units: degrees
    
    geographic_lat - Latitude, units: degrees
    
    scale_x - scaleFactor from the x coordinate variable
    
    offset_x - addOffset from the x coordinate variable
    
    scale_y - scaleFactor from the y coordinate variable
    
    offset_y - addOffset from the y coordinate variable
    
    Returns:
    
    fractional fgf coordinates
  - earthToElemLine
```
public int[] earthToElemLine(double geographic_lon,
                             double geographic_lat,
                             double scale_x,
                             double offset_x,
                             double scale_y,
                             double offset_y)
```
    Transform pixel center Earth coordinates (lon,lat) to integer FGF coordinates.
    
    Parameters:
    
    scale_x - scaleFactor from the x coordinate variable
    
    offset_x - addOffset from the x coordinate variable
    
    scale_y - scaleFactor from the y coordinate variable
    
    offset_y - addOffset from the y coordinate variable
  - SatToFGF
```
public double[] SatToFGF(double lamda,
                         double theta,
                         double scale_x,
                         double offset_x,
                         double scale_y,
                         double offset_y)
```
    Transform (lamda, theta) in radians to fractional FGF coordinates.
    
    Parameters:
    
    scale_x - scaleFactor from the x coordinate variable
    
    offset_x - addOffset from the x coordinate variable
    
    scale_y - scaleFactor from the y coordinate variable
    
    offset_y - addOffset from the y coordinate variable
  - scanGeomToSweepAngleAxis
```
public static String scanGeomToSweepAngleAxis(String scanGeometry)
```
    Find sweep_angle_axis associated with a scan geometry
    
    Parameters:
    
    scanGeometry - scanning geometry (GOES or GEOS)
    
    Returns:
    
    sweep_angle_axis (x or y)
  - sweepAngleAxisToScanGeom
```
public static String sweepAngleAxisToScanGeom(String sweepAngleAxis)
```
    Find scan geometry associated with sweep_angle_axis
    
    Parameters:
    
    sweepAngleAxis - sweep_angle_axis (x or y)
    
    Returns:
    
    scan_geom scanning geometry (GOES or GEOS)
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object

Class GEOSTransform

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

GOES

GEOS

WGS84

GRS80

wgs84

grs80

scan_geom

Constructor Detail

GEOSTransform

GEOSTransform

GEOSTransform

GEOSTransform

GEOSTransform

GEOSTransform

Method Detail

earthToSat

satToEarth

GOES_to_GEOS

FGFtoEarth

FGFtoSat

elemLineToEarth

earthToFGF

earthToElemLine

SatToFGF

scanGeomToSweepAngleAxis

sweepAngleAxisToScanGeom

equals

hashCode