## page was renamed from pos_add
=== Program pos_add ===

The specified parameters are added to a pos file. The variable TIME_INIT in pos file can contain different times. The values for all parameters are interpolated spatial (with bval3d) and temporal from isentropic data.

==== Configuration file ====

The options for the execution of ''pos_add'' can be set in the configuration file '''pos_add.inp''':
{{{
N.Thomas                        ! user
/usr/nfs/clams/isen_zeta/2003   ! Input directory (isentropic file)
isen_ECT                        ! Prefix of isentropic/ecmwf files (_yymmddhh.nc will be added)
6                               ! interval  between met. files (in hours)
pos_AA2_03120112.nc             ! name of pos/aircraft file
NPARTS                          ! name of dimension in pos/aircraft file (for LAT,LON,vertcoor and TIME)
TIME_INIT                       ! name of variable with time
3                               ! number of parameters
TEMP
PV
PRESS_TROP1_OLD
}}}


To add variables from ERA5 datasets with tropopause info only (''ecmwf_era5_yymmddhh_tropopause.nc''), it is also possible to specify a postfix in line 3 
and a directory with the additional ERA5 data (datasets with vertical coordinate) in the last line.
{{{
N.Thomas                                      ! user
/usr/nfs/data/meteocloud/fastdata/met_data/ecmwf/era5-trop/yyyy/mm   ! Input directory (meteorological file)
ecmwf_era5, tropopause                        ! Prefix and postfix of meteorological files -> prefix_yymmddhh_postfix.nc 
6                                             ! interval  between met. files (in hours)
pos-add-test/pos_aaa_10070112.nc              ! name of pos file
NPARTS                                        ! name of dimension in pos/aircraft file (for LAT,LON,vertcoor and TIME)
TIME_INIT                                     ! name of variable with time
4    0               ! number of parameters, optional: method of interpolating (0=weighted(default), 1=nearest)
TROP1_Z
TROP1_PRESS
TROP1_TEMP
TROP2_Z
/usr/nfs/data/meteocloud/fastdata/met_data/ecmwf/era5/nc/yyyy/mm  ! File with vertical coordinate (THETA|ZETA|PRESS|Z)
}}}