Proton-M - Turksat-4B - Flight Profile

Time Event
T-0:00:02.50 Ignition Sequence Start
T-0:00:01.75 Stage 1 at 40% Thrust
T-0:00:00.90 Stage 1 at 100% Thrust
T+0:01:02.0 Maximum Dynamic Pressure
T+0:01:59.0 Stage 1/2 Separation
T+0:05:27.0 Stage 2/3 Separation
T+0:05:47.0 Payload Fairing Separation
T+0:09:41.9 3rd Stage / Briz-M Separation
T+0:11:46.0 Briz-M First Ignition
Burn Duration: 4 min & 26 sec
T+0:16:12.0 Briz-M Shutdown
T+1:07:33.0 Briz-M Second Ignition
Burn Duration: 17 min & 46 sec
T+1:25:19.0 Briz-M Shutdown
T+3:28:30.0 Briz-M Third Ignition
Burn Duration: 14 min & 27 sec
T+3:42:57.0 Briz-M Shutdown
T+3:43:47.0 APT Separation
T+3:45:14.0 Briz-M Fourth Ignition
Burn Duration: 3 min & 9 sec
T+3:48:23.0 Briz-M Shutdown
T+8:51:35.0 Briz-M Fifth Ignition
Burn Duration: 8 min & 59 sec
T+9:00:34.0 Briz-M Shutdown
T+9:13:00.0 Spacecraft Separation

To deliver the Turksat 4B Spacecraft to an optimized Geostationary Transfer Orbit, the Proton-M Rocket will perform a nominal ascent mission and deliver the Orbital Unit consisting of a Briz-M Upper Stage and the Payload to a sub-orbital trajectory. The large Proton-M Rocket will launch from the Baikonur Cosmodrome, Kazakhstan. Separating after 9 Minutes and 42 Seconds, the Orbital Unit will start powered flight by igniting the Briz-M Main Engine to place itself in a Low-Earth Parking Orbit. In total, the Briz-M Upper Stage will make five Main Engine Burns separated by coast phases to increase its orbital altitude. After all burns are complete, the Satellite will be separated 9 Hours and 13 Minutes after Liftoff and start its own mission lasting for 20 years.

Flight Design


  • Parking Orbit: 173 by 173 Kilometers - Inclination: 51.5°
  • Intermediate Orbit: 270 by 5,000 Kilometers - Inclination: 50.3°
  • Transfer Orbit: 425 by 35,799 Kilometers - Inclination: 49.1°
  • Injection Orbit - GTO: 9,281 by 35,786 Kilometers - Inclination: 13.2°
Map: International Launch Services
Image: Khrunichev
Image: Khrunichev
Image: Khrunichev
Image: Khrunichev
Image: Khrunichev
Image: Khrunichev
Image: Khrunichev
Image: Khrunichev
Image: Khrunichev
Image: Khrunichev