Changeset 14728 for trunk/psphot/doc/2Dmodels.txt

Timestamp:

Sep 3, 2007, 5:19:42 PM (19 years ago)

Author:

eugene

Message:

added some notes, comments

File:

• trunk/psphot/doc/2Dmodels.txt (modified) (1 diff)

trunk/psphot/doc/2Dmodels.txt

@@ -13 +13 @@
 job representing the variations.
 
+My new concept for modeling 2D variations in some parameter is to
+define a low-resolution 2D image to represent the variation.  The
+advantage is that the image may be define with whatever resolution may
+be sampled by the input data, and the functional form need not be
+constrained by the polynomial basis function.  
+
+** is this a poor substitute for using a chebychev polynomial as a
+   better basis function?
+
+psphot parameters which vary by position:
+
+pmPSF.params 
+pmPSF.ApTrend
+pmPSF.FluxScale (flux given normalization of 1.0)
+