Reception of S11a Cherta & E11 Oblique on 15720 kHz, June 3

NUMBERS STATION   Reception of S11a Cherta & E11 Oblique on 15720 kHz, June 3:
0715-0727 on 15720 unknown secret tx site to Eu English USB mode S11a-very weak
0745-0748 on 15720 unknown secret tx site to Eu English USB mode E11, weak/fair
https://www.youtube.com/watch?v=J5d7e2VlwhI&feature=youtu.be
https://www.youtube.com/watch?v=eseuvkXkX_8&feature=youtu.be
https://www.youtube.com/watch?v=HS0Vw46rB0A&feature=youtu.be