T00:00 
Liftoff 
The first stage's decommissioned Peacekeeper SR118 solid rocket motor
ignites to begin the Minotaur 4 rocket's mission. Pitch and roll commands
two seconds later will put the rocket on the proper trajectory. 

T+00:37 
Max Q 
Aerodynamic pressure on the vehicle reaches its peak as the Minotaur 4
accelerates through the lower atmosphere. 

T+00:57 
Stage 1 Sep./Stage 2 Ignition 
At an altitude of 15 miles, the rocket's ATKbuilt solidfueled first stage exhausts its supply of propellant and is jettisoned. The second stage's SR119 motor ignites to continue the flight toward space. 

T+01:55 
Stage 2 Burnout 
The second stage SR119 motor, built by Aerojet, burns out at an altitude of 58 miles. 

T+02:05 
Stage 2 Sep./Stage 3 Ignition 
After a 10second coast, the Hercules SR120 third stage motor fires for a 72second burn. 

T+02:17 
Fairing Jettison 
The 92inch graphiteepoxy aluminum honeycomb payload fairing that protected the satellites during the ride through the lower atmosphere is jettisoned as the rocket ascends
into space at an altitude of 78 miles. 

T+03:18 
Stage 3 Burnout 
The Hercules SR120 motor completes its burn and the Minotaur 4 enters a coast period lasting almost 20 minutes, during which the vehicle's altitude will soar to more than 400 miles. 

T+22:55 
Stage 3 Separation 
The Minotaur's third stage is released to reenter Earth's atmosphere. 

T+23:06 
Stage 4 Ignition 
The Star 48 solid rocket motor is ignited to complete the job of placing the payload into orbit. This is the first flight of a Minotaur 4 rocket with the Star 48 fourth stage motor. This version of the rocket is called the Minotaur 4+ configuration. 

T+24:28 
Stage 4 Burnout 
The fourth stage uses up its propellant and burns out as it enters the
targeted elliptical orbit with a perigee altitude of about 115 miles, an apogee altitude of 7,487 miles, and an orbital inclination of 63.435 degrees. 

T+27:48 
TacSat 4 Separation 
The Navy's TacSat 4 satellite is deployed from the Minotaur 4
rocket's fourth stage. 
