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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
For the Tp = no units and The other variables have been reclassified to values 0 - 5. Units degrees Correo electronico generado desde un BlackBerry de movistar. -----Original Message----- From: Tom Whittaker <whittaker@xxxxxxxx> Date: Tue, 07 Dec 2010 18:16:19 To: Luis Del Castillo<luis.delcastillo@xxxxxxxxxxxx> Cc: <idvusers@xxxxxxxxxxxxxxxx> Subject: Re: [idvusers] IDV formulas Luis -- What are the units of each of your fields? tom On Tue, Dec 7, 2010 at 2:57 PM, Luis Del Castillo <luis.delcastillo@xxxxxxxxxxxx> wrote: > Tom after you send me your email I did this: > > (newUnit(Sr, "ries", "R")*newUnit(SI, "ries", "R")*newUnit(Sh, "ries", > "R"))*(newUnit(Ts, "ries", "R") + (newUnit(P, "ries", "R") + newUnit(P1, > "ries", "R") + newUnit(P2, "ries", "R"))) > > This is the only way that I saw a correct evaluation of the formula and I see > it when I plot each layer values as Value plots. > If I just run (Sr*SI*Sh)*(Ts + Tp) I get a bad value something like > (4*5*2)*(3 + 50) = 4 and since I use precipitation accumulated 72 hr I must > get a high value. > > So could be true about the incompatibility between Ts and Tp so am wondering > what could be the best way to reassign unit here because the output like 250 > or 450 is going to be in hight risk, low risk. > > Bay the way I am trying to write a procedure like this one > > def landSlideH(sr, si, sh, ts, tp, tpr, tpre): > ptot= tp + tpr + tpre > h = (sr*si*sh)*(ts + ptot) > return h > > Can I use newUnit inside it? > > Thanks > Luis > > -----Original Message----- > From: Tom Whittaker [mailto:whittaker@xxxxxxxx] > Sent: martes, 07 de diciembre de 2010 03:23 p.m. > To: Luis Del Castillo > Cc: idvusers@xxxxxxxxxxxxxxxx > Subject: Re: [idvusers] IDV formulas > > Hi Luis... > > It would seem to me that if there is a unit compatibility issue with > this formla: > > equation is H = (Sr*SI*Sh)*(Ts + Tp) . > > it would have to be between Ts and Tp. Is that true? Or is there > some other issue here? > > Best wishes, > > tom > > -- > Tom Whittaker > University of Wisconsin-Madison > Space Science & Engineering Center (SSEC) > Cooperative Institute for Meteorological Satellite Studies (CIMSS) > 1225 W. Dayton Street > Madison, WI 53706 USA > ph: +1 608 262 2759 > -- Tom Whittaker University of Wisconsin-Madison Space Science & Engineering Center (SSEC) Cooperative Institute for Meteorological Satellite Studies (CIMSS) 1225 W. Dayton Street Madison, WI 53706 USA ph: +1 608 262 2759
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