A UK X-ray mission, also known as UK-5.
Ariel V was launched into a low inclination (2.8 degrees) orbit from the San Marco launch platform in the
Indian Ocean on 15 October 1974. The mission was a
British-USA collaboration. The Science Research Council managed the project for
the UK and GSFC/NASA for the
Ariel V was dedicated to monitoring the X-ray sky with a comprehensive payload.
The mission ended in the spring of 1980. USA