Matrix (atmospheric compartment sampled)
Matrix: <matrix identifier>
The matrix identifies the atmospheric compartment sampled by the reported measurement. If reporting variables with different matrices, default matrix may be changed by using Matrix=<matrix> in vname.
The matrix stated here doesn't rule out that the
file contains parameters that are given in other matrices as
specified in the respective vnames.
The allowed values include:
- precip+dry_dep (only to be used for surface sampling)