Index: /trunk/doc/release.2015/ps1.analysis/analysis.tex
===================================================================
--- /trunk/doc/release.2015/ps1.analysis/analysis.tex	(revision 39939)
+++ /trunk/doc/release.2015/ps1.analysis/analysis.tex	(revision 39940)
@@ -107,5 +107,5 @@
 data products.  This paper (Paper IV) describes the details of the
 source detection and photometry, including point-spread-function and
-extended source fitting models, and the techniques for ``forced''
+extended source model fitting, and the techniques for ``forced''
 photometry measurements.
 
@@ -227,9 +227,9 @@
 
 When the IPP development was starting, the existing photometry
-packages either did not meet the level of accuracy required or were
+packages either did not meet the accuracy requirements or
 required too much human intervention to be considered for the needs of
 PS1.  In the case of the SDSS Photo tool, the software was judged to
 be too tightly integrated to the architecture of SDSS to be easily
-re-integrated into the Pan-STARRS pipelin.  A new photometry analysis
+re-integrated into the Pan-STARRS pipeline.  A new photometry analysis
 package was developed using lessons learned from the existing
 photometry systems.  In the process, the object analysis software was
@@ -237,16 +237,19 @@
 \code{psLib}.  Components of the photometry code were integrated into
 the IPP's mid-level astronomy data analysis toolkit called
-\code{psModules}.  The result software, 'PSPhot', can be used either
+\code{psModules}.  The resulting software, `PSPhot', can be used either
 as a stand-alone C program, or as a set of library functions which may
 be integrated into other programs
 
+\note{add refs to the psLib and psModules ADDs}
+
 The main version of PSPhot is a stand-alone program which is run on a
-single image or a group of related images representing the data read
+single image, or a group of related images representing the data read
 from a camera in a single exposure.  The images are expected to have
 already been detrended so that pixel values are linearly related to
-the flux.  The gain may be specific by the configuration system, or a
+the flux.  The gain may be specified by the configuration system, or a
 variance image may be supplied.  A mask may also be supplied to mark
 good, bad, and suspect pixels.  Several variants of psphot have also
-been used in the PS1 PV3 analysis.  
+been used in the PS1 PV3 analysis.  \note{ppImage version is an
+  integrated library call}
 
 The version called PSPhotStack accepts a set of images, each
@@ -262,8 +265,8 @@
 photometry.
 
-A second version of PSPhot used in the PV3 analysis is called
+Another version of PSPhot used in the PV3 analysis is called
 PSPhotFullForce.  In this version, a set of image all representing the
 same pixels are processed together, with the positions of sources to
-be analysed loaded from a supplied file.  In this version the
+be analysed loaded from a supplied file.  In this version of the
 analysis, sources are not discovered -- only the supplied sources are
 considered.  PSF models are determined for each exposure and the