The Panoramic Survey Telescopes & Rapid Response System (Pan-STARRS) dropped its data release on December 19, 2016.
Realizing you want to jump straight to the details, check out: PS1 Data Processing procedures.
There is far more to be seen but here’s a shot of the sidebar:
Jim Gray favored the use of astronomical data because it was “big” (this was before “big data” became marketing hype) and it is free.
Enjoy!