#HC47S Arrange for a greyline sked. Keep tabs of the signal reports during the whole window of opportunity and see how the signal booms in and fades out. For digimodes, you can either try a keyboard-to-keyboard mode which monitors the sig.al (Olivia, PSK, JS8) or try multiple exchanges on FT8/FT4.
From Europe, the greyline lands on different US states on different months.