  Testing the Weak Equivalence Principle (WEP) to a precision of $10^{-15}$
requires a quantity of data that give enough confidence on the final result:
ideally, the longer the measurement the better the rejection of thestatistical
noise. The science sessions had a duration of 120 orbits maximum and were
regularly repeated and spaced out to accommodate operational constraints but
also in order to repeat the experiment in different conditions and to allow
time to calibrate the instrument. Several science sessions were performed over
the 2.5 year duration of the experiment. This paper aims to describe how the
data have been produced on the basis of a mission scenario and a data flow
process, driven by a tradeoff between the science objectives and the
operational constraints. The mission was led by the Centre National d'Etudes
Spatiales (CNES) which provided the satellite, the launch and the ground
operations. The ground segment was distributed between CNES and Office National
d'Etudes et de Recherches A\'erospatiales (ONERA). CNES provided the raw data
through the Centre d'Expertise de Compensation de Tra\^{i}n\'{e}e (CECT:
Drag-free expertise centre). The science was led by the Observatoire de la
C\^ote d{'}Azur (OCA) and ONERA was in charge of the data process. The latter
also provided the instrument and the Science Mission Centre of MICROSCOPE
(CMSM).
