EUSO-SPB2
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EUSO-SPB1 flew as a mission of opportunity suspended below a NASA super-pressure balloon that was launched as a test flight on April 24th 23:51 UTC 2017 from Wanaka, New Zeland. Unfortunately the 2017 balloon developed an anomaly that necessesitated an early termination of the mission. The entire flight train was "valved down" about 300 km southeast of Easter Island 12 days after the launch. It currently rests on the deep ocean floor.

EUSO-SPB1 shortly before its 2017 launch from Wanaka. The instrument hangs below the crane on the left.

Despite the setbacks, the EUSO-SPB1 instrument operated successfully while aloft and returned 60 GB of data. For details of the data analysis, see arXiv:1909.03005.

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