Some questions about OBSGRID

[panting]

Hello! I would like to ask some questions about OBSGRID.
Question 1: According to the official user guide I've read, it says that the observation data has a time interval of 6 hours and after downloading, it needs to be split into 3-hour intervals using get_rda_data.exe. Is this a necessary step? If I use the WPS to generate met_em.* files based on 6-hour ERA5 data, do I still need to split the OBS data into 3-hour intervals when processing the met_em.* files with OBSGRID?
Here is a screenshot of the official user guide:


Question 2: If I need to modify the data splitting interval of the get_rda_data.exe program, should I modify the get_rda_data.f file and recompile it, or should I directly modify the interval value in the record1 section of the namelist.oa?
These are my questions, and I look forward to your answers!

 

[kwerner]

Question 1: According to the official user guide I've read, it says that the observation data has a time interval of 6 hours and after downloading, it needs to be split into 3-hour intervals using get_rda_data.exe. Is this a necessary step? If I use the WPS to generate met_em.* files based on 6-hour ERA5 data, do I still need to split the OBS data into 3-hour intervals when processing the met_em.* files with OBSGRID?
Here is a screenshot of the official user guide:

No, I don't believe that is necessary. The information written in the OBSGRID section of the Users' Guide is probably a bit out of date. Give it a try without splitting it into 3-hour intervals and see if it works okay.

Question 2: If I need to modify the data splitting interval of the get_rda_data.exe program, should I modify the get_rda_data.f file and recompile it, or should I directly modify the interval value in the record1 section of the namelist.oa?

I believe you would need to modify the script, itself (i.e., not the namelist), and recompile it.

 

[panting]

No, I don't believe that is necessary. The information written in the OBSGRID section of the Users' Guide is probably a bit out of date. Give it a try without splitting it into 3-hour intervals and see if it works okay.


I believe you would need to modify the script, itself (i.e., not the namelist), and recompile it.

Thank you very much for your kind help！！！