The image to the right is the latest - and most likely last - HYSPLIT prediction for the SDG-9 flight. The end of the red line (north of Scotland) indicates where the transmitter's battery will likely die, all of this assuming that the balloon is still aloft.
Note the time scale at the bottom of the image - the end of the line is at 1200UTC today, 25 March. Will the balloon be within range for someone to hear it by this time? I simply do not know.
I have written to several amateur operators in Greenland and Iceland but, as yet, have received no replies. Will it be close enough to the UK to be heard? I have no idea - but I encourage amateurs in the UK to listen closely over the next ten hours and see if you can hear anything.
Thanks again to everyone who has taken the time to listen or drop us a line - and please check back for further updates, including details on the balloon design used in this mission.