UTC(IT)-GPS=-15s

---------------------------------
MJD    x [ns] y [10E-13]
---------------------------------
55440 -22.9  -0.1
55441 -18.1  -0.6
55442 -11.7  -0.7
55443 -10.8  -0.1
55444  -9.3  -0.2
55445  -8.3  -0.1
55446  -8.1   0.0
55447  -9.3   0.1
55448 -11.4   0.2
55449 -14.5   0.4
55450 -16.2   0.2
55451 -16.0   0.0
55452 -15.1  -0.1
55453 -14.2  -0.1
55454 -10.8  -0.4
55455  -9.7  -0.1
55456  -5.8  -0.5
55457  -6.1   0.0
55458  -5.7   0.0
55459  -7.4   0.2
55460  -6.5  -0.1
55461  -8.5   0.2
55462 -11.2   0.3
55463  -9.5  -0.2
55464 -11.5   0.2
55465 -14.3   0.3
55466 -13.3  -0.1
55467 -12.5  -0.1
55468 -11.5  -0.1
55469  -8.7  -0.3