How can I specify eta_levels?

[sdahal]

In a previous forum, Dr. Ming Chen suggested running REAL first and then manually specifying the vertical levels. When the REAL run is complete, where should I look for the automatically generated eta_levels?

Thank you!
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[Ming Chen]

In wrfinput file, you can find the variable ZNW, which gives eta values on full model levels. This is what you need to look and follow it to modify eta_levels in your namelist.input.