  NASA's next flagship mission, the Nancy Grace Roman Space Telescope, is a
2.4-meter observatory set to launch no later than May 2027. Roman features two
instruments: the Wide Field Imager and the Coronagraph Instrument. Roman's
Coronagraph is a Technology Demonstration that will push the current
capabilities of direct imaging to smaller contrast ratios ($\sim$10$^{-9}$) and
inner-working angles (3~$\lambda$/D). In order to achieve this high precision,
Roman Coronagraph data must be calibrated to remove as many potential sources
of error as possible. Here we present a detailed overview of the Nancy Grace
Roman Space Telescope Coronagraph Instrument Observation Calibration Plan
including identifying potential sources of error and how they will be mitigated
via on-sky calibrations.
