For the Tp = no units and The other variables have been reclassified to values
0 - 5. Units degrees
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-----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
