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 |
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