EUSO-SPB (EUSO Super Pressure Balloon) is an experiment on board a super pressure balloon for a long duration flight. EUSO-SPB was launched at 22:50 UTC on April 24th from the NASA balloon launch site in Wanaka (New Zealand) and landed on the South Pacific Ocean on May 7th. Data analysis is in progress.

The instrument is an updated version of the first EUSO-Balloon payload. It includes a full original JEM-EUSO PDM (photon detection module with 2304 pixels), as in EUSO-Balloon, and a Fresnel lens optical system, 1 m each side, covering a field of view of ±6 degree. An improved version of the trigger allows to catch high energy cosmic ray events. The different parts of the instrument were realized in several countries in Europe and America and in Japan. The full integration of the telescope was made in Colorado at the School of Mines. Laser tests were done at the Telescope Array site. Hang tests were performed in Palestine (Texas). On November 2016 the instrument was shipped to New Zealand.

The main scientific objective is the first observation and measurement of Ultra High Energy Cosmic Ray Air Showers by looking down from near space by a fluorescence detector. The EUSO-SPB is searching for UV pulse signatures from other objects as meteoroids, atmosphere TLEs, SQM, LSPs. It measures also slowly varying UV light as airglow, bioluminescence even over the ocean.

NASA Credit