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19990405: RMS question

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  • Subject: 19990405: RMS question
  • Date: Mon, 05 Apr 1999 10:10:52 -0600
>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