SWF 3 is only a radio station (was, it exist no more).
ZDF (Second German Television) is traditional more linked in the south of Germany (headquarter in Mainz).
PS:
Thank you for upload this great stuff!
SDR plus SWF = SWR ( Fusion was 1998 )
SWR gives it also on the TV
SWR is member of ARD (first channel of german tv)
http:/de.wikipedia.org/indexwiki/SWF_3
