3DVAR with radiance from GOES16

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Joined: Thu May 02, 2019 1:35 pm

3DVAR with radiance from GOES16

Post by thorsten » Thu May 02, 2019 1:38 pm

Dear Colleagues,

I'm just trying to get radiance data from GOES16 into 3DVAR. We rely on Advanced Baseline Imager data in netcdf files similar to those NOAA offers on Google and Amazon cloud platforms (https://data.nodc.noaa.gov/cgi-bin/iso? ... cdc:C01502). With GOES16, transmission changed from GVAR to GRB. Looking at the netcdf variables and metadata it seems they are now using NetCDF Climate and Forecast (CF) Metadata Conventions.

Stepping through the code of WRFDA version 4.1, it expects only data from GOES 13 to 15, although radiative transfer models are already prepared for GOES16. If one could introduce the calibration coefficients and zenith angle for GOES16 into WRFDA code, there would be still the problem that name conventions for the netcdf variables and metadata have changed.

So before joining the adventure to modify the codes (e.g. da_read_obs_ncgoesimg.inc) I'd like to ask if there is already some new interface for GOES16.

With best regards,

Thorsten Beisiegel

Posts: 19
Joined: Mon Feb 25, 2019 8:14 pm

Re: 3DVAR with radiance from GOES16

Post by JJGuerrette » Mon Jun 03, 2019 4:17 pm

There is an internal effort in MMM to add this capability. It will be released in a future version, but we do not know when at this time. WRFDA will directly read the L1B data in netcdf format from all four view domains (2 x Mesoscale, CONUS, and Full Disk).

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