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[ferret_users] precision problem on a difference between a same variable read from 2 files with the same structure

To: ferret users <ferret_users@xxxxxxxx>
Subject: [ferret_users] precision problem on a difference between a same variable read from 2 files with the same structure
From: Patrick Brockmann <patrick.brockmann@xxxxxxxxxxxx>
Date: Fri, 14 Jun 2019 21:31:28 +0200 (CEST)
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Thread-topic: precision problem on a difference between a same variable read from 2 files with the same structure

Hi ferreters,

I encountered a problem when I compare a variable

read from 2 different files with exactly the same structure (same axis in particular).

The difference calculated with ferret has the following range:

Minimum value: -2.1516798E-11

Maximum value: 2.15167981E-11

but the difference calculated with ncdiff ci_restart_extract.nc
Description: Cdf file

Attachment: diff.nc
Description: Cdf file

Attachment: err1.jnl
Description: Binary data

Attachment: err2.jnl
Description: Binary data

Attachment: run_restart_extract.nc
Description: Cdf file

Attachment: run_restart_extract_renamed.nc
Description: Cdf file

Follow-Ups:
- Re: [ferret_users] precision problem on a difference between a same variable read from 2 files with the same structure
  - From: Ansley C. Manke

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