Index: trunk/ippToPsps/config/tables.DF.vot
===================================================================
--- trunk/ippToPsps/config/tables.DF.vot	(revision 39131)
+++ trunk/ippToPsps/config/tables.DF.vot	(revision 39268)
@@ -57,5 +57,5 @@
       </FIELD>
       <FIELD name="expTime" arraysize="1" datatype="float" unit="seconds" default="-999">
-	<DESCRIPTION>Exposure time of positive image.</DESCRIPTION>
+	<DESCRIPTION>Exposure time of positive image.  Necessary for converting listed fluxes and magnitudes back to measured ADU counts.</DESCRIPTION>
       </FIELD>
       <FIELD name="psfModelID" arraysize="1" datatype="int" unit="dimensionless" default="-999">
@@ -220,14 +220,14 @@
       </FIELD>
       <FIELD name="zp" arraysize="1" datatype="float" unit="magnitudes" default="0">
-        <DESCRIPTION>Photometric zeropoint.</DESCRIPTION>
+        <DESCRIPTION>Photometric zeropoint.  Necessary for converting listed fluxes and magnitudes back to measured ADU counts.</DESCRIPTION>
       </FIELD>
       <FIELD name="telluricExt" arraysize="1" datatype="float" unit="magnitudes" default="NA">
-        <DESCRIPTION>Estimated Telluric extinction due to non-photometric observing conditions.</DESCRIPTION>
+        <DESCRIPTION>Estimated Telluric extinction due to non-photometric observing conditions.  Necessary for converting listed fluxes and magnitudes back to measured ADU counts.</DESCRIPTION>
       </FIELD>
       <FIELD name="expTime" arraysize="1" datatype="float" unit="seconds" default="-999">
-        <DESCRIPTION>Exposure time of the positive single-epoch image.</DESCRIPTION>
+        <DESCRIPTION>Exposure time of the positive single-epoch image.  Necessary for converting listed fluxes and magnitudes back to measured ADU counts.</DESCRIPTION>
       </FIELD>
       <FIELD name="airMass" arraysize="1" datatype="float" unit="dimensionless" default="0">
-        <DESCRIPTION>Airmass at midpoint of the exposure.</DESCRIPTION>
+        <DESCRIPTION>Airmass at midpoint of the exposure.  Necessary for converting listed fluxes and magnitudes back to measured ADU counts.</DESCRIPTION>
       </FIELD>
       <FIELD name="DpsfFlux" arraysize="1" datatype="float" unit="Janskys" default="-999">