Intelsat 27

Also called IS-27, S2827

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General

Designation	n/a
Launch date	1 Feb 2013
Country of origin	International
Mission	Telecommunications
Geostationary orbit	55.5°W
Launch vehicle	Zenit Sea Launch

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End of life

Out of service	1 Feb 2013
Cause	launch failure

The UHF hosted payload provides capability to complement the existing UHF Follow-On (UFO) and future ( MUOS satellites. The payload supported DAMA and IW operations, and is digitally tunable and completely interoperable with existing terminals. The UHF payload would have been functionally equivalent to the U.S. Navy's UHF 11 satellite. 20 x 25 kHz channels.

The replacement is named Intelsat 34

Technical data

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EIRP coverage (dBW)

C-band
Ku-band Atlantic
Ku-band Andean Mexico
Ku-band Brasil

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Specifications

Prime contractor	Boeing
Platform	HS702MP
Mass at launch	5450 kg
Dry mass
Dimension
Solar array
Stabilization	3-axis
DC power
Design lifetime	15 years

TT&C: downlink: 3701.25 MHz, 3701.75 MHz, 3702.25 MHz, and 3702.75 MHz (space-to-Earth)
uplink: 5925.5 MHz and 6424.5 MHz

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UHF-band

Main transponders	20
Backup transponders
Power
Bandwidth	25 kHz
Coverage
EIRP max
G/T max
Polarization
Frequencies	243.52-268.16 MHz 292.835-317.33 MHz

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C-band

Main transponders	20
Backup transponders
Power
Bandwidth	16 x 36 MHz 4 x 72 MHz
Coverage	America and Europe
EIRP max	39 dBW
G/T max
Polarization	linear H/V
Frequencies	uplink: 5.925-6.425 GHz downlink: 3.700-4.200 GHz

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Ku-band

Main transponders	19 (24 in 36-MHz equivalent)
Backup transponders
Power
Bandwidth	27, 36, 54, 72, 77 MHz
Coverage	North Atlantic Andean/Mexico Brazil
EIRP max
G/T max
Polarization	linear H/V
Frequencies	uplink: 14.0-14.5 GHz downlink: 11.45-11.70 GHz & 11.70-12.2 GHz & 12.5-12.75 GHz

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