June 2:
Gordon installed Andrew Turnipseed's RMYoung sonic on the tower. The bracket is 120 cm above our 38m sonic bracket. The boom is 60 degrees counterclockwise (viewed from above) from our sonic booms (the boom is installed on the 'climbing' face of the tower).
He plans to use this for periodic REA measurements of trace gas fluxes. He will pull up a sample line with a rope on a pulley attached to his sonic boom.