Index: trunk/ippScripts/scripts/stack_skycell.pl
===================================================================
--- trunk/ippScripts/scripts/stack_skycell.pl	(revision 15302)
+++ trunk/ippScripts/scripts/stack_skycell.pl	(revision 15376)
@@ -53,6 +53,7 @@
    [   
        #          PPSTATS KEYWORD         STATISTIC          STACKTOOL FLAG
-       { name => "ROBUST_MEDIAN",  type => "mean",  flag => "-bg",             dtype => "float" },
-       { name => "ROBUST_STDEV",   type => "rms",   flag => "-bg_stdev",       dtype => "float" },
+       { name => "ROBUST_MEDIAN",   type => "mean", flag => "-bg",        dtype => "float" },
+       { name => "ROBUST_STDEV",    type => "rms",  flag => "-bg_stdev",  dtype => "float" },
+       { name => "GOOD_PIXEL_FRAC", type => "mean", flag => "-good_frac", dtype => "float" },
    ];
 my $stats = PS::IPP::Metadata::Stats->new($STATS); # Stats parser