Support for DWD Composite HG product?

22 views

Skip to first unread message

Stefan Krusche

unread,

Mar 28, 2023, 10:22:15 AM3/28/23

to wradlib-users

Hi everybody,

first, I would like to thank you for sharing wradlib with us. It is a great library

that really facilitates working with DWD radar datasets.

My question refers to Composite HG products:

Loading HG* files with method 'read_radolan_composite' seems to skip

precipitation classes 'Graupel' and 'Hagel', which refer to values 4096 and

8192 in the dataset. The same is true for 'no precipitation' which is 16777216.

When looking into the source code, internal method '_process_data' shifts the

values by adding 0xFFF (line 1135), which seems to be the root cause for my

observation.

Did I miss something? Please point me into the right direction.

Thank you very much, Stefan

Kai Mühlbauer

unread,

Mar 28, 2023, 10:30:51 AM3/28/23

to Stefan Krusche, wradlib-users

Hi Stefan,

can you share your wradlib version?

Good chance that you spotted a bug/inconsistency. Is HG product one of the new Polara-based products?

Anyway I'll have a look at it. Another question, do you depend on the `read_radolan_composite`-function or would you also consider the new xarray backend?

One final remark, this mailing list will be closed later this year. We've joined forces in the Openradar community:

https://openradar.discourse.group/

Please consider joining there.

Best,
Kai