[gradsusr] How to determine Strength of Ocean Current using Grads

[Julio Martinez]

d u_velocity.1; v_velocity.1;mag(u_velocity.1,v_velocity.1)
Hope it helps!

Julio N. Martínez Sánchez
M.C. en Oceanografía Física
Consultor en SitioSubgerencia de Pronóstico a Mediano y Largo PlazoGerencia de Meteorología y ClimatologíaServicio Meteorológico NacionalExt. 3156

From: anilku at oceanmanager.com
To: gradsusr at gradsusr.org
Date: Tue, 27 May 2014 11:45:59 +0530
Subject: [gradsusr] How to determine Strength of Ocean Current using Grads

Hi Grad Users, Below is my question and work done so far on my problem, please guide me to solve. Question : How to calculate the strength of ocean current data to provide different colors to different levels using Grads ? Work Done so far : Ocean current data downloaded from NOAA and below is the ctlinfo from the NetCDF data dset D:\OceanData\2014\05\25\rtofs_glo_2ds_f024_daily_prog.nctitle 2D Sfc Daily Prognostic 00Z21may2014: Forecast, downloaded May 25 15:22 UTCundef 1.26765e+30dtype netcdfxdef 720 linear 74.16 0.49998ydef 360 linear -90 0.49998zdef 1 linear 1 1tdef 1 linear 00Z25MAY2014 1mnvars 2u_velocity=>u_velocity  1  t,z,y,x  eastward_sea_water_velocity (m/s)v_velocity=>v_velocity  1  t,z,y,x  northward_sea_water_velocity (m/s)endvars Am using below selected commands to generate vectors, and automatically it gives in strength in terms of length of arrow. sdfopen D:/ OceanData /2014/05/25/rtofs_glo_2ds_f024_daily_prog.ncd u_velocity.1; v_velocity.1 if I make vector’s scaling fixed to 0.015 using ‘set arrscl 0.15‘.  So how can I calculate strength of vectors to provide them colors according to levels ? Thanks & RegardsAnil Kumar 
_______________________________________________
gradsusr mailing list
gradsusr at gradsusr.org
http://gradsusr.org/mailman/listinfo/gradsusr 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20140527/f3e7ffa8/attachment.html