Apart from the odd sunrise or sunset, I normally only get one shot at capturing each timelapse I undertake whilst shooting on location.  Unlike traditional filming, there's no 'cut' and start over from the director - there's often no director with me so I'm left to my own devices to get the shot in the can.  This task however, was a bit more of a rare occurance.  We're not talking solar eclipse rare; more of a couple of month's wait and by that time, I would have missed the transmission date anyway!