[gradsusr] traj.gs modified for 3d

[Ted Pollock]

Hi Jean,

The script is somewhat of a work in progress but I'll attach what I've  
got so far.

Here's the good news.

It now interpolates u, v, and w in all 3 dimensions (centered  
difference in time) to do the trajectory calculation.

Here are some caveats.

If you are familiar with the original traj.gs script then you know it  
occasionally fails to calculate a proper centered difference due to  
lack of convergence. I still need to add some lines to average the  
last 3 or 4 iterations to obtain a better estimate.

Also, the script does all of its calculations in z coordinates.  
Ideally it would perform the calculation in sigma coordinates without  
first converting to z. This would improve run speed.

The script could be a lot smoother in terms of taking in all of the  
relevant dimension info from the ctl file. Right now, I need to set  
all of the sigma levels inside the script.

The script is still in development so you will probably need to modify  
it quite a bit. Feel free to email me if you have questions. If you  
can improve on it and send me the changes that would be great too.

Hope you find it useful,

Ted



Quoting "Jean Peres" <jean.rrp at gmail.com>:

> *Hi Ted,
> *
>
> *I'd be interested in getting this script too.*
>
> *THANKS!*
>
> --
> Jean Peres
> Meteorologista
> Laboratório MASTER
> Departamento de Ciências Atmosféricas
> Instituto de Astronomia, Geofísica e Ciências Atmosféricas
> Universidade de São Paulo
>

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