15515v is usual 05-09 UT on hfcc.org database from 05 UT towards 59degr central and east Asia path via arctic Alaska into southern US Yankee states like OK.15530 is 5-8 UT towards western central Europe (and further into New England WBCQ Land, hi)
15540 DRM mode encoded (ex 11970 kHz), is usual UTC afternoon 16-21 UT instead.
{The engineer at Kuwait was a little indolent today, to switch over ?}
73 wb
http://www.hard-core-dx.com/article.php?story=20210724141502714