<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'><div style="font-family: Andale Mono; font-size: 12pt; color: rgb(102, 102, 102);"><div><div><div style="font-family: andale mono; font-size: 12pt; color: rgb(102, 102, 102);"><div><div><div><div>I am an Amateur Weather Enthusiast and have been receiving Eumetcast data for many years.<br></div><div>I am trying to move away from Windows, because I have been a Linux user for many years as well.<br></div><div>I have been using David Taylor's excellent suite of programs to look at data including the Sea Ice product from SAF but this is written for Windows, and I am using wine to run it. I really want to move to Linux Only!<br></div><div><br></div><div>The product is in Polar Stereographic Projection<br></div><div><br></div><div>I have installed ncl fine using version 6.3.0 on CentOS 7 <br></div><div>I can convert the Grib1 files to netCDF using ncl_convert2nc<br></div><div><br></div><div>I cannot see how to write a script (I have not found one on your site) to create the image.<br></div><div><br></div><div>Here is the output of ncl_filedump (the Grib file is 1.8Mb, the netCDF file is 13.6Mb)<br></div><div>------------------------------------------------------------<br></div><div>warning:GribOpenFile: Grid Description Section not consistent with NCEP documention of grid 5; using GDS values for variables with this grid<br><br>Variable: f<br>Type: file<br>filename: S-OSI_-NOR_-MULT-GL_NH_CONC__-201602121200Z<br>path: Documents/S-OSI_-NOR_-MULT-GL_NH_CONC__-201602121200Z.grb<br> file global attributes:<br> dimensions:<br> gridx_5 = 1120<br> gridy_5 = 760<br> variables:<br> float ICE_C_5_SFC ( gridx_5, gridy_5 )<br> center : Oslo<br> long_name : Ice concentration (ice=1;no ice=0)<br> units : fraction<br> _FillValue : 1e+20<br> coordinates : gridlat_5 gridlon_5<br> level_indicator : 1<br> gds_grid_type : 5<br> parameter_table_version : 1<br> parameter_number : 91<br> forecast_time : 0<br> forecast_time_units : hours<br> initial_time : 02/12/2016 (12:00)<br><br> float gridrot_5 ( gridx_5, gridy_5 )<br> long_name : vector rotation angle<br> GridType : Polar Stereographic Projection Grid<br> units : radians<br> formula_u : Ugrid = cos(rot)*Uearth - sin(rot)*Vearth<br> formula_v : Vgrid = sin(rot)*Uearth + cos(rot)*Vearth<br> note1 : u and v components of vector quantities are resolved relative to earth<br> note2 : apply formulas to derive u and v components relative to grid<br><br> float gridlat_5 ( gridx_5, gridy_5 )<br> corners : ( 33.975, 33.07173, 27.59339, 28.35711 )<br> long_name : latitude<br> GridType : Polar Stereographic Projection Grid<br> units : degrees_north<br> ProjectionCenter : north<br> Dy : 10000<br> Dx : 10000<br> Lov : -45<br> Lo1 : -80.73<br> La1 : 33.975<br><br> float gridlon_5 ( gridx_5, gridy_5 )<br> corners : ( -80.73, -7.803853, 102.2406, 166.3792 )<br> long_name : longitude<br> GridType : Polar Stereographic Projection Grid<br> units : degrees_east<br> ProjectionCenter : north<br> Dy : 10000<br> Dx : 10000<br> Lov : -45<br> Lo1 : -80.73<br> La1 : 33.975<br></div><div>---------------------------------------------------------------------------<br></div>I would be grateful if someone could point me in the right direction. I have done a lot of programming over the years in C, Java, Python, Perl etc.<br></div><div><br></div><div>Regards<br><div>Francis</div></div></div></div></div></div></div></div></div></body></html>