product L3m SST/ DN to SST

[constanza.vargas]

Hello! i'm new in SeaDas and i have a question with the pixel information.

I procesed the image of L1 to L2, then L2 to L3 and L3 to L3mapgen. When i display the imagen in Seadas/idrisi and ArcGis, the pixel information is in DN and not at sea surface temperature (SST). Is there an algorithm that allows me to convert from DN to SST?.
The map is the correct but the value is DN.

Other question is: Can i use a command in linux to process L2 to L3? It take me a long time to process this part.

Thanks for your time!! :)

[OB.DAAC - SeanBailey]

The SST product is stored as a scaled integer.  The file metadata provides the scaling factor to apply, e.g.  ncdump -h A2017109.L3m_DAY_NSST_sst_9km.nc |grep sst :
netcdf A2017109.L3m_DAY_NSST_sst_9km {
        short sst(lat, lon) ;
                sst:long_name = "Sea Surface Temperature" ;
                sst:scale_factor = 0.005f ;  <----- slope
                sst:add_offset = 0.f ;       <----- intercept
                sst:units = "degree_C" ;
                sst:standard_name = "sea_surface_temperature" ;
                sst:_FillValue = -32767s ;
                sst:valid_min = -1000s ;
                sst:valid_max = 10000s ;
                sst:display_scale = "linear" ;
                sst:display_min = -2.f ;
                sst:display_max = 45.f ;

[constanza.vargas]

Thank you very much!!! i can transform the image to idrisi with the sst.