  The Pan-STARRS Data Processing System is responsible for the steps needed to
downloaded, archive, and process all images obtained by the Pan-STARRS
telescopes, including real-time detection of transient sources such as
supernovae and moving objects including potentially hazardous asteroids. With a
nightly data volume of up to 4 terabytes and an archive of over 4 petabytes of
raw imagery, Pan-STARRS is solidly in the realm of Big Data astronomy. The full
data processing system consists of several subsystems covering the wide range
of necessary capabilities. This article describes the Image Processing Pipeline
and its connections to both the summit data systems and the outward-facing
systems downstream. The latter include the Moving Object Processing System
(MOPS) & the public database: the Published Science Products Subsystem (PSPS).
