[ferret_users] Longitude and latitude of eddy amplitude as variables, how to convert them into axis of the variable amp

To: ferret_users@xxxxxxxx

Subject: [ferret_users] Longitude and latitude of eddy amplitude as variables, how to convert them into axis of the variable amp

From: Avimanyu Ray <avimanyuray2008@xxxxxxxxx>

Date: Thu, 13 Feb 2020 16:39:58 +0530

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Hi all,

This is the first time I'm asking a question in ferret_users group, so please let me know if I could convey my question properly to all.

I have 365 daily files '20140101.nc', '20140102.nc',.....till '20141231.nc'. Each file contains 3 variables:

eddy_amplitude, longitude, and latitude.

Each of these variables have only 1 axis, i.e. J axis.

For example,

currently SET data sets:
1> ./20140101.nc (default)
name title I J K L
AMPLITUDE ... 1:3 ... ...

LONGITUDE ... 1:3 ... ...

LATITUDE ... 1:3 ... ...

This means that, I have records of amplitudes, longitudes and latitudes of 3 eddies on that day, 01-jan-2014.

Number of eddies are not fixed daily.

I want to make a single annual netcdf file 'eddy.nc' like this:

currently SET data sets:

1> eddy.nc (default)
name title I J K L
AMP 1:21 1:21 ... 1:365

yes? sh gr AMP
GRID MY_GRID
name axis # pts start end subset
XAXIX LONGITUDE 21mr 79E 99E full
YAXIX LATITUDE 21 r 3N 23N full
normal Z
TAXIS TIME 365 r 01-JAN-2014 12:00 31-DEC-2014 12:00 full

I am not getting any idea how to obtain this resultant file from my daily files.

Also, what to do when my given longitude and latitude coordinates are variables instead of axis.

In case you need ncdump of the given and resultant files, let me know. Please help me through this, as I am new to Ferret. Thanks in advance!