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gaia early data release 3 documentation

6.4 Processing steps

6.4.6 STAMTA

The single-transit analysis (STA) and multi-transit analysis (MTA) modules are integrated in the same workflow, named STAMTA in Figure 6.2. First, STA processes the data per transit to obtain the single-transit spectroscopic radial velocities. Then, MTA combines the single-transit radial velocities to produce the radial velocity of the star, Vrad, published in Gaia DR2 .