Digital burst, Data streams?

Came across these while tuning around. They are definitely sky wave propagation because of the QSB. They appear randomly in this band segment. Recorded this using the SDR PLAY SDR with my OCF Dipole and SDR Console v3 software.

OK2RZ as heard here in northern NJ – 20m DX

This is OK2RZ from the Czech Republic as heard here on 6/5/2016 @ 1945 UTC on 20m. He was speaking about a hail storm there. Some of the USA stations he was working could not be copied here. I was using ,y SDR PLAY RSP with my OCF dipole and SDR Console v3 software. I turned on the LNS, (Low Noise Amplifier), which did improve the copy of his station by lowering the noise floor some.