Time Based Separation rules
Time-Based Separation (TBS)
The time based wake turbulence radar separation rules on final approach derived from the distance based wake turbulence separation rules.
SESAR doc. 06.08.01 Operational Concept Description (OCD) and Operational Service and Environment Definition (OSED) for Time Based Separation for Arrivals (TBS), Ed 00.01.02 , 2013
The TBS rules are based on a Ground Speed Profile conversion from applying the DBS rules in low headwind conditions. The ground speed profile conversion is based on a reference airspeed profile over the distance based separation to the runway landing threshold that the ICAO DBS rules are applied.
The reference airspeed profile is aligned to a 150kt IAS standard reference landing stabilisation speed profile to the runway landing threshold and is aligned to a 170kt IAS standard procedural airspeed profile to 6NM from the runway landing threshold prior to landing speed stabilisation.
Lexicon Release 2015.2