Changes between Initial Version and Version 1 of GP2

Timestamp:

Nov 1, 2010, 9:43:37 AM (16 years ago)

Author:

chambers

Comment:

--

GP2

@@ +1 @@
+= Gene 2 =
+
+{{{
+After a couple of false starts and delays, we have finally updated the
+operational IPP to the latest version.
+
+The regular processing is now being performed with the IPP tag
+ipp-20101029 (the Black Friday tag...).  This can be found in our svn
+tree at:
+
+https://svn.pan-starrs.ifa.hawaii.edu/repo/ipp/tags/ipp-20101029
+
+This update incorporates a number of changes that have been in the
+works and in testing since the meeting at Belfast.  Here is a summary
+of the most important changes and improvements:
+
+* new output formats : PS1_V3 and PS1_DV2, with a number of new fields.  see:
+ http://svn.pan-starrs.ifa.hawaii.edu/trac/ipp/wiki/CMF_PS1_V3
+ http://svn.pan-starrs.ifa.hawaii.edu/trac/ipp/wiki/CMF_PS1_DV2
+
+* the Star likelihood measurement and the Cosmic Ray detection are
+improved, see the discussion at:
+ http://svn.pan-starrs.ifa.hawaii.edu/trac/ipp/wiki/StarGalaxySeparation
+
+* Cosmic Rays are now masked in the chip-stage output images
+
+* Some improvements to both the DUAL and SINGLE convolution analysis,
+discussed at the following link (more discussion to be added soon):
+ http://svn.pan-starrs.ifa.hawaii.edu/trac/ipp/wiki/ppSubModifications_201009
+
+* Stack masking now includes information about the cause of masked
+pixels, as well as information about suspicious pixels.  see:
+ http://svn.pan-starrs.ifa.hawaii.edu/trac/ipp/wiki/Stack
+
+* Fixes to the bright star masking:  The size of the bright star
+circles was OK for very bright stars (-23 inst mags), but too small
+for stars at or just beyond the saturation limit.  This is now fixed.
+Also, the w-band images used too small of a zero point for the over
+all scaling.
+
+* STACK-STACK processing now uses SINGLE convolution of the template
+instead of DUAL convolution
+
+* addressed a couple of low-level bugs that caused errors in the
+calculation of centroids or screwed up the peak positions in some
+chips
+
+* for faint sources, where we do not perform a full non-linear fit for
+the position, we are now reporting the position and position errors
+based on the centroids rather than on the peak in the detection image.
+ With the fix above, this gives much more reliable values for the
+position and errors on these faint sources.
+
+* for forced photometry, we are now keeping the supplied position (the
+code had been letting the position be reset by the pixel analysis,
+which is definitely wrong).
+
+This release includes some fixes to psphotStack, which is used for the
+'static sky / deep stack' photometry, but there are a few outstanding
+concerns that have not yet been addressed.  This release also does not
+address the STS desire for forced photometry in the diff images of the
+input image sources.
+
+Also note that MOPS will continue to receive the old format tables
+until they are ready; the detections are being generated at the diff
+stage with the new format (PS1_DV2), but the publication process is
+producing the old format.
+
+Finally, this is NOT the final IPP version release before the Great
+Reprocessing.  Aside from the issues listed above, there are some
+other things to be addressed.  We will be producing sample
+re-processing of MD04 and SAS data, among others, for feedback.  I
+suspect it will be 2 - 3 weeks before everything else that needs to be
+addressed before the Great Reprocessing can be addressed.
+
+aloha
+gene
+
+}}}