Large Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 23
Distraction; Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Airspace Structure; Procedure; Human Factors
I was working Local Assist 2. We were busy with departures; and The TM (Traffic Manager) passed a strip for a SMO departure (Aircraft Y). After coordinating with the Malibu Sector I coordinated with SMO and gave them a one minute heads-up; Aircraft X started his takeoff roll and at the appropriate point I released the SMO departure. The SMO departure came off and we ended up with 2.75 between Aircraft X and Aircraft Y.I released the SMO departure where I always do; but Aircraft Y must have jumped on it as he got airborne and Aircraft X must have been slow on his climb. I can give a little more room; but we had three more departures off of SMO after Aircraft Y; and I released them at the same point and the separation was adequate.
LAX Tower Controller reported of a loss of separation when a SMO departure was too close to an LAX departure.