== IPP Progress Report for the week 2009.09.13 - 2009.09.18 == 
[[PageOutline]]

(Up to [wiki:IPP_Progress_Reports IPP Progress Reports])

=== Eugene Magnier ===

=== Heather Flewelling === 

=== Bill Giebink ===

 * Continued to identify and correct errors in psLib unit tests. Basic procedure is to:
  * identify failing tests,
  * determine if the test is still a valid measure of the underlying code, and,
  * if the test is not measuring anything useful then it's eliminated or replaced, also,
  * failures due to changed function parameters, different error checking, etc. are fixed.

 * In addtion, commented upon test deficiencies are being remedied where feasible.

=== Paul Price ===

 * Detection efficiency: merged branches/pap into trunk, r25383.
 * PS1SC:
  * Set up nightlogs@ps1sc.org list
  * Organising UK tour
  * Retrieved and sent dravg archive
 * Stacking:
  * Everything was getting rejected.  Turned off "additional variance" in pmStack, and get decent rejections now.  This is not well understood yet, but may be connected with a change made a month ago removing the "variance factor" terms, or renormalising the image subtraction chi^2.
  * Can identify bad images using the iq statistics calculated in psphotImageQuality.c: iq_m2, iq_m2_uq-iq_m2_lq, iq_m3 and iq_m4 are useful quantities.
  * Sent Nigel and Peter a dump of ThreePi data from June/July that should be useful for determining good cuts on these quantities.
  * High-frequency structure in kernels caused by minimum ISIS width = 1 (FWHM, not sigma!): fixed ppSub recipe
  * Increased rejection threshold (COMBINE.REJ) to 2.5 from 2.0 standard deviations.
  * Using a given analytic PSF instead of that produced by pmPSFEnvelope produces reasonable results for the stack.  Attempting to correlate resultant convolution kernels with iq statistics.
 * Fixed fuzz of FITS images so that expectation values are preserved (trunk@25439), after help from http://fits.gsfc.nasa.gov/registry/tilecompression.html



=== Bill Sweeney ===

=== Chris Waters ===