Russian

Sea Launch Project

High Spots

Intelsat-21 Launch


SC Intelsat-21 is the communication satellite manufactured by Boeing Satellite Systems Incorporated (BSSI) based on 720MP mid-level power platform and its mass is 5 984 kg.

The Intelsat-21 mission was prepared at the Home Port from June 26 to August 2, 2012.
LV Zenit-2S No. SL34 and Block DM-SL No. 33L were used to launch the Intelsat-21 SC.

Chronology of activities (Moscow Time)

June 26 - August 2, 2012

Home Port activities:

  • LV Zenit-2S No. SL34 electropneumatic tests;
  • LV Zenit-2S No. SL34 integrated tests under the injection program;
  • Block DM-SL No. 33L electropneumatic tests;
  • Block DM-SL No. 33L integrated tests under the injection program;
  • Filling of Block DM-SL No. 33L TCS with coolant;
  • Filling of Block DM-SL No. 33L with kerosine, NT and UDMH and gases;
  • Integrated rehearsal #1 with the off-nominal situation simulation during the processing;
  • SC processing activities;
  • SC filling;
  • Rocket Segment systems and equipment processing;
  • OSC of processing equipment complex and pre-launch processing system under the control of LP ACC;
  • Loading propellant components and compressed gases into ships. Kerosine preparation operations;
  • ILV assembly and testing;
  • ILV reloading from ACS to LP;
  • ILV dry roll-out (installation on the launch pad and critical launch readiness checklist).

 

August 2 - 14, 2012

Launch Platform and Assembly/Command Ship passage to the launch area. Activities in the sea passage phase:

  • Sea tests of the Launch Platform and the Assembly/Command Ship;
  • Integrated rehearsal No. 2 with the ONS simulation during the processing;
  • Integrated rehearsal No. 3 with comprehensive involvement of all the personnel and practically all standard and borrowed launch support and flight tracking facilities;
  • Daily parameter control of Block DM-SL;
  • Status monitoring and daily maintenance of RS systems during the sea passage.
August 14 - 19, 2012

Launch site activities:

  • Transfer of the Rocket Segment systems and equipment from the state of readiness for the sea passage to the state of readiness for ILV PLP and launch;
  • Assessment of oceanographic conditions;
  • ILV preparation for roll-out and erection on the launch pad;
  • US processing (within ILV);
  • Operations for LP LMC transfer to readiness for the sensor data acquisition and transmission during the launch operations;
  • Integrated checks of the Upper Stage automated flight control system;
  • OSC of processing equipment complex (PEC) and pre-launch processing systems (PLPS) under the control of LP ACC;
  • Kerosine preparation for ILV filling;
  • Search for the Launch Platform optimal orientation;
  • Bringing the launch platform in the launch position;
  • Bringing the assembly and command ship in the launch position;
  • ILV roll-out and erection on the launch pad;
  • ILV electrical checks;
  • Critical launch readiness checklist;
  • SC and PLU launch rehearsal;
  • Checks of communication channels;
  • Personnel evacuation from LP to ACS;
  • PLP including ILV fueling.
August 19, 2012

At 10 hr 54 min 59.15 sec, Moscow Time (at 23 hr 54 min 59.15 sec on August 18, 2012, Pacific Daylight Time) ILV Zenit-3SL No. SL34 with Intelsat-21 spacecraft was launched. All flight operations were performed normally. SC Intelsat-21 was injected into the design target orbit.

August 19 - 20, 2012
  • Bringing the equipment in the initial state after ILV launch;
  • Return of the "red team" onboard the LP and the incoming inspection of the launch platform;
  • Bringing the equipment in the state of readiness to the sea passage.
August 20 - September 2, 2012

The launch platform and the assembly/command ship passage from the launch area to the Home Port.

LAUNCH RESULTS

Based on TMI data the Intelsat-21 spacecraft has been injected into orbit with the following parameters: (the first apogee passage)

Perigee altitude,
km
Apogee altitude,
km
Inclination,
deg
280.0
35 793.7
0,0

News Archive

June  2019
Mon Tue Wed Thu Fri Sat Sun
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30