  In April to May 2023, the superBIT telescope was lifted to the Earth's
stratosphere by a helium-filled super-pressure balloon, to acquire astronomical
imaging from above (99.5% of) the Earth's atmosphere. It was launched from New
Zealand then, for 40 days, circumnavigated the globe five times at a latitude
40 to 50 degrees South. Attached to the telescope were four 'DRS' (Data
Recovery System) capsules containing 5 TB solid state data storage, plus a GNSS
receiver, Iridium transmitter, and parachute. Data from the telescope were
copied to these, and two were dropped over Argentina. They drifted 61 km
horizontally while they descended 32 km, but we predicted their descent vectors
within 2.4 km: in this location, the discrepancy appears irreducible below 2 km
because of high speed, gusty winds and local topography. The capsules then
reported their own locations to within a few metres. We recovered the capsules
and successfully retrieved all of superBIT's data - despite the telescope
itself being later destroyed on landing.
