Press Release

Media Advisory: ILS Proton to Launch SES-4 for SES

By SpaceRef Editor
December 23, 2011
Filed under , ,

SES-4 communications satellite
SS/L 1300 Platform
Separated spacecraft Mass: ~ 6,180 kg (13,625 lbs)

Launch Vehicle:
Proton M/Breeze M
705,000 kg (1,554,000 lb), including payload
58.2 m (191 ft)

Launch Date:
December 27, 2011

Launch Time:
00:41 Baikonur
19:41 Luxembourg, December 26
10:41 Palo Alto, December 26
18:41 GMT, December 26
13:41 EST, December 26

Launch Site:
Baikonur Cosmodrome, Kazakhstan
Launch Pad 39

Launch Customer:
SES, Luxembourg

Satellite Manufacturer:
Space Systems/Loral, Palo Alto, Ca

Launch Vehicle Manufacturer:
Khrunichev State Research and Production Space Center,
Moscow, Russia

Launch Services Provider:
International Launch Services, Reston, Va

Satellite Use:

Poised to be the largest satellite in the SES fleet, SES-4 at 338*east replacing NSS-7, will enhance what is already the largest neighborhood in the Atlantic. SES-4 will be a hybrid satellite featuring high powered C-band coverage and incremental global capacity which is ideal for video distribution, government and VSAT services. The satellite’s Ku-band payload will provide enhanced coverage and capacity across Europe, the Middle East, Africa, Western Africa and Latin America. SES-4 will bring a substantial increase in the total capacity available at 338* east. The state-of-the-art spacecraft has been specifically designed for its orbital location, with C-band beams serving the eastern hemisphere of Europe/Africa, full America’s coverage as well as a global beam to support mobile and maritime customers. Four high powered regional Ku-band beams will provide service to Europe, the Middle East, West Africa, North America and South America with extensive cross-strapping between C- and Ku-band transponders providing enhanced connectivity.

Satellite Statistics:

__Largest, most powerful satellite in the SES Fleet
__52 C-band transponders
__72 Ku-band transponders
__Planned orbital location: 338 degrees East longitude
__Anticipated service life: 15 years

Mission Profile:

The Proton M launch vehicle, utilizing a 5-burn Breeze M mission design, will lift off from Pad 39 at Baikonur Cosmodrome, Kazakhstan, with the SES-4 satellite on board. The first three stages of the Proton will use a standard ascent profile to place the orbital unit (Breeze M upper stage and the SES-4 satellite) into a sub-orbital trajectory. From this point in the mission, the Breeze M will perform planned mission maneuvers to advance the orbital unit first to a circular parking orbit, then to an intermediate orbit, followed by a transfer orbit, and finally to a geostationary transfer orbit. Separation of the SES-4 satellite is scheduled to occur approximately 9 hours, 12 minutes after liftoff.

Target Orbit at Separation:
Perigee: 3,714 km
Apogee: 35,786 km
Inclination: 24.6 degrees

Spacecraft Separation:

Approximately 9 hours, 12 minutes after liftoff

ILS Mission Statistics:

_20th SES Satellite Launch on ILS Proton
_21st Space Systems/Loral Satellite Launched on ILS Proton
_6th ILS Proton Launch in 2011/ 10th Proton Launch Overall in 2011
_70th ILS Proton Launch Overall

More Information:

Live webcast will begin approximately 25 minutes before liftoff. General mission information and launch status updates are available at the website. You can also follow us on Twitter and “like” us on Facebook for mission updates.

Live Broadcast:

Live Coverage starting at 13:15 EST / 18:15 GMT.
Launch is scheduled for 13:41:12 EST/ 18:41:12 GMT.
Launch Broadcast concludes no later than 14:15 EST / 19:15 GMT.

Webcast can be seen at:

SES-2 @ 87W (formerly AMC-3)
C21 Full 36.00 MHz
U/L frequency: 6,345.000 / Vertical
D/L frequency: 4,120.000 / Horizontal
Audio 6.2 and 6.8
Booking ID: 155086

W2A 10 deg East TXP B3 CHANNEL 6MHZ SLOT-3B6
UPLINK FREQ.: 14348 MHZ POL Y (Vertical)
DOWNLINK FR.: 11048 MHZ POL X (Horizontal)
SD 625 16:9 50Hz DVBS2 8PSK 4.9373Ms/s FEC 3/4,
P RoF 0.2 (11_SD MPEG2 422 10.7514 Mbps)

SpaceRef staff editor.