Ah nice! I did wonder about RTE but last time I considered it , it was under a death sentence. But it seems to have survived. I presume the 0.25Hz is due (possibly) to a gravity wave in the D-layer.
See http://www.rte.ie/news/2014/1219/667931-rte-longwave/ which says that this service has been extended until 2017. John F5VLF [email protected] Researching history of RABSON, BLACKSHAW, GAUNT