CDAAC input files not always recording fiducial id

[Ian Culverwell]

Axel von Engeln (EUM) reports:

On another point, I also just noted that UCAR seems to sometimes 
not provide the attribute fiducial_id.

So the call:
 
CALL ncdf_getatt('fiducial_id', readstr)

in ropp_io_read_ncdf_get.f90
 
likely needs some update as well, e.g. first checking that it 
exists.

The attached file contains an example.

[Ian Culverwell]

atmPrf_MTPA.2013.001.12.30.G21_2016.0120_nc

[Ian Culverwell]

He further writes:

On the fiducial_id, I only noticed that it is no longer 
available in Metop data provided by UCAR. I so far have 
seen it always empty, all missions do single 
differencing by now. I have modified my local copy of 
ROPP and found that it also requires to make the 
optimized bangle optional. I attached a Metop-A file, 
as just extracted from UCAR, for further info.

[Ian Culverwell]

I noticed that although Opt_bend_ang was indeed missing from Axel's exmaple file, Bend_ang1 and Bend_ang2 were present, so ropp_io_read_ncdf_get.f90 now reads those (if it can).

These changes have been made at r4988.

[Ian Culverwell]

Checks out OK on new and old atmPrf and wetPrf files, so close ticket as 'fixed'.