[ferret_users] How to merge daily and monthly data file in Ferret

[Don DNA <don_vbe@xxxxxxxxx>]

Hi all ,
I am new to ferret, I want to merge daily and monthly data, and want to make single file
my daily data looks like this

netcdf ws_oaflux_1985 {
dimensions:
    time = UNLIMITED ; // (365 currently)
    lat = 180 ;
    lon = 360 ;
variables:
    float lon(lon) ;
        lon:long_name = "longitude" ;
        lon:units = "degrees" ;
        lon:range = "0.5 to 359.5" ;
    float lat(lat) ;
        lat:long_name = "latitude" ;
        lat:units = "degrees" ;
        lat:range = "89.5S to 89.5N" ;
    int time(time) ;
        time:units = "day" ;
        time:comment = "Year 1985" ;
    short wnd10(time, lat, lon) ;
        wnd10:comments = "daily mean neutral wind speed at 10m" ;
        wnd10:units = "m/s" ;
        wnd10:scale_factor = 0.01 ;
        wnd10:missing_value = 32766. ;
    short err(time, lat, lon) ;
        err:comments = "estimated error of analysed neutral wind speed at 10m" ;
        err:units = "m/s" ;
        err:scale_factor = 0.01 ;
        err:missing_value = 32766. ;

// global attributes:
        :creation_date = "Dec 2007" ;
        :description = "WHOI Objectively Analyzed air-sea Fluxes (OAFlux) Project" ;
        :project_PIs = "Lisan Yu, Bob Weller" ;
        :website = "http://oaflux.whoi.edu"; ;
}
yes? sh d
     currently SET data sets:
    1> ./ws_oaflux_1985.nc  (default)
 name     title                             I         J         K         L         M         N
 WND10                                     1:360     1:180     ...       1:365     ...       ...
 ERR                                       1:360     1:180     ...       1:365     ...       ...
 
yes? sh g wnd10
    GRID GTL1
 name       axis              # pts   start                end
 LON       LONGITUDE          360mr   0.5E                 0.5W
 LAT       LATITUDE           180 r   89.5S                89.5N
 normal    Z
 TIME      T (day)            365 r   1                    365
 normal    E
 normal    F
yes?
and my monthly data looks like this
netcdf ws_oaflux_1958 {
dimensions:
    time = UNLIMITED ; // (12 currently)
    lat = 180 ;
    lon = 360 ;
variables:
    float lon(lon) ;
        lon:long_name = "longitude" ;
        lon:units = "degrees" ;
        lon:range = "0.5 to 359.5" ;
    float lat(lat) ;
        lat:long_name = "latitude" ;
        lat:units = "degrees" ;
        lat:range = "89.5S to 89.5N" ;
    int time(time) ;
        time:units = "month" ;
        time:comment = "Year 1958" ;
    short wnd10(time, lat, lon) ;
        wnd10:comments = "monthly mean neutral wind speed at 10m" ;
        wnd10:units = "m/s" ;
        wnd10:scale_factor = 0.01 ;
        wnd10:missing_value = 32766. ;
    short err(time, lat, lon) ;
        err:comments = "monthly mean estimated error of wind speed at 10m" ;
        err:units = "m/s" ;
        err:scale_factor = 0.01 ;
        err:missing_value = 32766. ;

// global attributes:
        :creation_date = "Dec 2007" ;
        :description = "WHOI Objectively Analyzed air-sea Fluxes (OAFlux) Project" ;
        :project_PIs = "Lisan Yu, Bob Weller" ;
        :website = "http://oaflux.whoi.edu"; ;
}
yes? sh d
     currently SET data sets:
    1> ./ws_oaflux_1958.nc  (default)
 name     title                             I         J         K         L         M         N
 WND10                                     1:360     1:180     ...       1:12      ...       ...
 ERR                                       1:360     1:180     ...       1:12      ...       ...
 
yes? sh g wnd10
    GRID GTL1
 name       axis              # pts   start                end
 LON       LONGITUDE          360mr   0.5E                 0.5W
 LAT       LATITUDE           180 r   89.5S                89.5N
 normal    Z
 TIME      T (month)           12 r   1                    12
 normal    E
 normal    F
yes?

those who know kindly help. I haven't done merging in Ferret before. I tried CDO to merge nc files but couldn't be done as I was getting some time axis error. and I tried to append but not worked.

Thanks in advance.


- Dona Clara