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>From: "Paul L. Sirvatka" <address@hidden> >Organization: College of DuPage >Keywords: 200104032011.f33KBiL13131 McIDAS-X RAOBPLOT RAOBCON PTDISP PTCON >RAOBCON.CORE RAOBPLOT.CORE Paul, >I ran the command RAOBCON MIX 850 USA and it gave me all the wrong mixing >ratios. Any idea why? See You are correct, the MIX values contoured from your invocation are bogus. The problem can also be seen in a RAOBPLOT: RAOBPLOT MIX 850 USA The problem turned out to be typos in the context files for RAOBPLOT and RAOBCON (RAOBPLOT.CORE and REAOBCON.CORE, respectively). The formulas for MIX were specifying use of T instead of TD in the calculation of mixing ratio: MIX UNIT=G/KG \ FORMAT=F5.2 \ MATH='RMIX(P1,P2)'\ IRAB='P1=T[K]' 'P2=P[HPA]' \ RAOB='P1=T[K]' 'P2=P[HPA]' These should be changed to be: MIX UNIT=G/KG \ FORMAT=F5.2 \ MATH='RMIX(P1,P2)'\ IRAB='P1=TD[K]' 'P2=P[HPA]' \ RAOB='P1=TD[K]' 'P2=P[HPA]' in both context files: <login as 'mcidas'> cd data <edit RAOBPLOT.CORE and REAOBCON.CORE and change the MIX entry to specify use of TD instead of T> After making the change to the context files, the plots/contours of MIX will agree with the values that are listed in UALIST output. I will include fixed context files in an upcoming addendum. For now, you should make the change to your local context files as I indicate above. Tom