September 23, 2021

Timeline for Soyuz launch with Hispasat 36W-1


If you would like to see more articles like this please support our coverage of the space program by becoming a Spaceflight Now Member. If everyone who enjoys our website helps fund it, we can expand and improve our coverage further.

Follow the key events of the Soyuz rocket’s ascent into orbit from the Guiana Space Center with the Hispasat 36W-1 communications satellite. A listing of exact times for the flight’s major events is posted below.

Data source: Arianespace

T-0:00:01: Engines at Full Thrust

The five main engines of the Soyuz rocket's core stage and four strap-on boosters are at full thrust.
The five main engines of the Soyuz rocket’s core stage and four strap-on boosters are at full thrust.

T+0:00:00: Liftoff

Producing more than 900,000 pounds of thrust, the Soyuz ST-B (Soyuz 2-1b) rocket soars into the sky from the Guiana Space Center.
Producing more than 900,000 pounds of thrust, the Soyuz ST-B (Soyuz 2-1b) rocket soars into the sky from the Guiana Space Center.

T+0:01:58: Jettison Boosters

The Soyuz rocket's four strap-on boosters, each powered by an RD-107A engine, are jettisoned after consuming their propellant.
The Soyuz rocket’s four strap-on boosters, each powered by an RD-107A engine, are jettisoned after consuming their propellant.

T+0:03:33: Jettison Fairing

The ST-type payload fairing is released from the Soyuz rocket when it reaches the edge of the upper atmosphere. The 13.5-foot-diameter fairing protects the payload during the launch countdown and the flight through the dense lower atmosphere.
The ST-type payload fairing is released from the Soyuz rocket when it reaches the edge of the upper atmosphere. The 13.5-foot-diameter fairing protects the payload during the launch countdown and the flight through the dense lower atmosphere.

T+0:04:47: Core Stage Separation

Having burned its propellant, the core stage of the Soyuz rocket, also known as the second stage, separates and the third stage’s RD-0124 engine ignites to continue the flight.
Having burned its propellant, the core stage of the Soyuz rocket, also known as the second stage, separates and the third stage’s RD-0124 engine ignites to continue the flight.

T+0:09:23: Soyuz/Fregat Separation

The Soyuz rocket’s third stage releases the Fregat-MT upper stage just shy of orbital velocity.

T+0:10:24: Fregat Ignition

The hydrazine-fueled Fregat upper stage ignites to place the Hispasat 36W-1 satellite in an elliptical geostationary transfer orbit.

T+0:23:32: Fregat Shutdown

After a 17-minute, 37-second burn, the Fregat upper stage shuts down to prepare for separation of the Hispasat 36W-1 satellite. The mission targets an orbit with a high point, or apogee, of 22,205 miles (35,736 kilometerS), a low point, or apogee, of 155 miles (250 kilometers), and an inclination of 5.44 degrees.

T+0:32:10: Hispasat 36W-1 Separation

The Hispasat 36W-1 communications satellite separates from the Fregat upper stage.

Email the author.

Follow Stephen Clark on Twitter: @StephenClark1.


If you would like to see more articles like this please support our coverage of the space program by becoming a Spaceflight Now Member. If everyone who enjoys our website helps fund it, we can expand and improve our coverage further.
Spaceflight Now