cdm/src/main/java/ucar/unidata/geoloc/projection/sat/GEOSTransform.java
public double[] FGFtoSat(double fgf_x, double fgf_y, double scale_x, double offset_x, double scale_y, double offset_y) {
    double x = fgf_x * scale_x + offset_x;
    double y = fgf_y * scale_y + offset_y;

    return new double[]{x, y};
  }
public double[] FGFtoSat(double fgf_x, double fgf_y, double scale_x, double offset_x, double scale_y, double offset_y) {
    double x = fgf_x * scale_x + offset_x;
    double y = fgf_y * scale_y + offset_y;

    return new double[]{x, y};
  }
Transform fractional FGF coordinates to (lamda, theta) radians.

@param fgf_x    fractional FGF coordinate, zero-based
@param fgf_y    fractional FGF coordinate, zero-based
@param scale_x  scaleFactor from the x coordinate variable
@param offset_x addOffset from the x coordinate variable
@param scale_y  scaleFactor from the y coordinate variable
@param offset_y addOffset from the y coordinate variable
@return (lamda, theta), units: radians