NASA’s latest super pressure balloon (SPB) is set for take-off from Wanaka Airport.
The purpose of the flight is to test the balloon technology in near-space.
The launch was scheduled for Saturday, however swirling winds have delayed the launch.
The balloon is about the size of the Forsyth-Barr Stadium in Dunedin, when fully inflated and is made from polyethylene film, similar to that used sandwich bags but is stronger.
Researchers hope the balloon will stay up for up to 100 days, setting a record.
The current record flight for such balloons is 54 days.