Index: trunk/ippconfig/gpc1/format_20100723.config
===================================================================
--- trunk/ippconfig/gpc1/format_20100723.config	(revision 40532)
+++ trunk/ippconfig/gpc1/format_20100723.config	(revision 40533)
@@ -235,4 +235,6 @@
 
 # Default PS concepts that may be specified by value
+# NOTE: CHIP.X0 = ($ix < 4) ? (4971 * ($ix + 1)) : ($ix * 4971 + 157)
+# NOTE: CHIP.Y0 = (5143 * $iy)
 DEFAULTS        METADATA
         FPA.TELESCOPE   STR     PS1