SUNRISE is a balloon-borne 1-meter solar telescope
(designed to be very light weight).
It has made four flights, termed SUNRISE I (June 2009),
SUNRISE II (June 2013) and SUNRISE III (an aborted July 2022 flight,
then a successful flight July 2024).
Collaborators include NASA, the MPIA, the
NAOJ, and a Spanish consortium.
Observations have been largely spectropolarimetry,
and have included near infrared, visible light,
and ultraviolet.
SUNRISE III instruments:
SUSI (Sunrise Ultraviolet Spectropolarimeter and Imager).