Numbers station S11a Cherta on 9339 kHz USB via Warsaw August 18

NUMBERS STATION   Reception of Numbers station S11a Cherta on 9339 kHz USB mode via Warsaw, August 18
0700-0711 on  9339 WWA ??? kW / unknown to Eu Russian USB mode. Very good signal via SDR Tambov, RUS.
https://www.youtube.com/watch?v=W-SQ1cgIjMs&feature=youtu.be
https://www.youtube.com/watch?v=nvzjiwHTTd4&feature=youtu.be