On Thursday, 8 October 2020 at 10:59:09 UTC+1, Tango Whisky wrote:
Idaflieg measurements are never published to the public.

Individuals can get a copy from the Idaflieg polar (but not all the data) on request for a fee no sooner than 5 years after the first flight of the type but you are not allowed to publish them without permission. See:
https://idaflieg.de/?page_id=88