Re: [ferret_users] Regridding error

To: Swetha sivakumar <swetha.s2060@xxxxxxxxx>

Subject: Re: [ferret_users] Regridding error

From: Ryo Furue <furue@xxxxxxxxxx>

Date: Thu, 23 Sep 2021 14:45:52 +0900

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Dear Swetha,

use d03_2011_u80_l12.nc
define axis/x=65.1359E:99.368E:0.0415441/units=degrees xfine
define axis/y=5.484N:35.063N:0.0384/units=degrees yfine
define axis/t="02-Jan-2011 01:00":"02-Jan-2012 00:00":1/units=hours tfine
define grid/X=xfine/Y=yfine/T=tfine gfine
show grid gfine
let Unew=U[g=gfine]
save/file=test.nc Unew

**ERROR: regridding: only @ASN regridding between calendar and
non-calendar axes: U80

This message suggests that the time axis, which seems to be called "U80", of your original data (d03_ . . . .nc), is not a proper calendar axis.

So, before mapping it onto a finer time grid, you need to set proper calendar attributes to the time axis.

I guess

set/axis/calendar=. . ./t0=. . . U80

would fix the problem. See "SET AXIS" in

https://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/commands-reference/SET

Ryo