  ADITYA L-1 is India's first dedicated mission to study Sun and its atmosphere
with Visible Emission Line Coronagraph (VELC), a major payload on ADITYA-L1.
VELC has provision to make imaging and spectroscopic observations of the
corona, simultaneously. Imaging with the Field of View (FOV) from 1.05Ro to 3Ro
will be done in continuum at 500nm. The spectroscopic observations of solar
corona in three emission lines, namely 5303 {\AA} [Fe XIV], 7892 {\AA} [Fe XI],
10747 {\AA} [Fe XIII], and Spectro-polarimetry at 10747 {\AA} [Fe XIII] will be
performed with FOV of 1.05-1.5Ro. In this work, the end-to-end data pipeline
architecture and development of the VELC payload are presented. The VELC
proposal submission form, satellite observation parameters, data products,
level definitions, data pipeline and analysis software to process the big raw
data sets obtained using VELC instruments onboard satellite to science-ready
data are discussed.
