Before Feb 2018, the meteosat 11 (MSG-4) were periodically reboosted approximately every 85 days:
EDIT: added the orbital inclination plot to show the clearly visible variation to both semi-major axis and inclination with a single burn.
(TLEs downloaded from www.space-track.org and calculations done with the JSpOC SGP4 library downloaded from the same site).
After the big deboost and reboost that took place on Feb 11/14:
the reboost period increased to about 114 days (but only 1 reboost is currently available).
Question 1: why that big change in the radius vector?
Question 2: why the reboosts are now bigger?