Changeset 27933 for branches/pap/pswarp/src/pswarp.h

Timestamp:

May 12, 2010, 12:56:07 PM (16 years ago)

Author:

Paul Price

Message:

Implementing better Jacobian correction. Previously, was calculating Jacobian from the projections (tangent plane --> sky), which does not account for scales in the transformations from the pixels to the tangent plane. Now using the local linear mapping to provide the Jacobian, so that it's applied on small areas. Also using the (square root of the) Jacobian to fix the plate scale of the covariance (instead of a single value for the entire focal plane) so the noise model should be more accurate as well.

File:

• branches/pap/pswarp/src/pswarp.h (modified) (2 diffs)

branches/pap/pswarp/src/pswarp.h

@@ -29 +29 @@
 #define PSASTRO_RECIPE "PSASTRO" ///< Name of the recipe to use
 
-#define PSWARP_ANALYSIS_VARFACTOR "PSWARP.VARFACTOR" ///< Name for variance factor in analysis metadata
 #define PSWARP_ANALYSIS_GOODPIX   "PSWARP.GOODPIX" ///< Name for number of good pixels in analysis metadata
 #define PSWARP_ANALYSIS_COVARIANCES "PSWARP.COVARIANCES" ///< Name for covariance matrices on analysis MD
+#define PSWARP_ANALYSIS_JACOBIAN "PSWARP.JACOBIAN" ///< Name for Jacobian on analysis MD
 
 /**
@@ -70 +70 @@
     int xMin, xMax, yMin, yMax;         ///< Bounds of tile
     psKernel *covariance;               ///< Covariance matrix
+    double jacobian;                    ///< (Square root of) local Jacobian
 } pswarpTransformTileArgs;