@author Wolfgang Kurtz, Guowei He
@date 21.03.2022
@brief Return number of observations from file
@param[in] fn Filename of the observation file
@param[out] nn number of observations in fn
@details
Reads the content of the variable (!) named no_obs
from
NetCDF file fn
.
Uses subroutines from the NetCDF module.
The result is returned in `nn`.
The result is used to decide if the next observation file is
used or not.
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
character(len=*), | intent(in) | :: | fn | |||
integer, | intent(out) | :: | nn |