TOBT (Target-off blocks time) and TSAT (Target Start-up Approval Time) relates to the departure flight leg.
TOBT is used for adding an estimate date time for when the aircraft will be ready for departure (all aircraft doors closed, boarding bridge disconnected, pushback tow-tug is in place and ready to start-up / pushback upon receiving the ATC clearance.)
TSAT is typically provided by the ATC taking into account the TOBT and slot times. It is when the aircraft can expect to receive start up / push back approval.
This setting is applicable to departure flight leg only and will not show for the arrival flight leg.
Setting is enabled and the TOBT and TSAT departure flight leg fields shown for editing.