Index: /trunk/archive/pslib/include/psAstrom.h
===================================================================
--- /trunk/archive/pslib/include/psAstrom.h	(revision 229)
+++ /trunk/archive/pslib/include/psAstrom.h	(revision 230)
@@ -28,7 +28,7 @@
     float mjd;				//!< MJD of observation
     float rotAngle;			//!< Rotator position angle
-    float temp;				//!< Air temperature, for estimating diffraction
-    float pressure;			//!< Air pressure, for calculating diffraction
-    float humidity;			//!< Relative humidity, for calculating diffraction
+    float temp;				//!< Air temperature, for estimating refraction
+    float pressure;			//!< Air pressure, for calculating refraction
+    float humidity;			//!< Relative humidity, for calculating refraction
     float exptime;			//!< Exposure time
     /* Derived quantities */