[ferret_users] define modulo axis from existing variable for diurnal cycle

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Subject: [ferret_users] define modulo axis from existing variable for diurnal cycle
From: Andy Jacobson (NOAA Affiliate) <andy.jacobson@xxxxxxxx>
Date: Mon, 17 Dec 2012 19:48:52 -0700
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Howdy,

I have three-hourly data in a netCDF file that ferret reads just fine.  I want to find the average diurnal cycle of this dataset, and I've been looking for a way to define a modulo time axis (of length 8) to which I can regrid with the climatology-creating gt=<my_diurnal_time_axis>@mod transformation. Do I want to (Can I) use the time axis of the existing variable to get the start/end/delta-t for this new axis, with a define axis/modulo=8 -type syntax?  Is there a more generic expression for this daily-cycle modulo axis that I want?

Thanks,

Andy

-- 
Andy Jacobson
andy.jacobson@xxxxxxxx

NOAA Earth System Research Lab
Global Monitoring Division
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