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>From: Brian Brong <address@hidden> >Organization: . >Keywords: 199904051532.JAA08833 >Unidata, > >I'm using OABSFC to perform a temperature analysis for my masters >thesis. I'm looking for clarification on the RMS values, seen below. >Is RMS the mean square difference between the observations and the grid >points or is it the root mean square difference? > > > RMS values for pass 1 > TMPK TMPC THTA STHA > RMS 2.99 2.29 2.80 0.01 > #STN 101 101 101 101 > > RMS values for pass 2 > TMPK TMPC THTA STHA > RMS 2.13 1.93 2.41 0.01 > #STN 100 100 100 100 > >Thanks for the help > >Brian Brong >Desert Research Institute >University of Nevada, Reno > Brian, RMS is the root mean square difference- eg, in $GEMPAKHOME/src/gemlib/oa/oasint.f, you see that the value is the square root of the sum of squared differences. Steve Chiswell Unidata User Support