N-star c – Orbital N-STAR c User Manual

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FS013_01_2998

N-STAR c

Mission Partners

NTT DoCoMo

NTT DoCoMo is Japan’s premier mobile communications
company, which provides wireless voice and data communications
to tens of millions of subscribers. NTT DoCoMo is the creator of
W-CDMA air interface technology, as well as the groundbreaking
mobile i-mode service.

Orbital Sciences Corporation

Orbital provided the system design and was responsible for the
assembly, integration and test of the spacecraft bus. Orbital also
provided the ground station and procured the launch services.

Lockheed Martin Commercial Space Systems

Lockheed Martin, as the prime contractor, participated in
integration and test, and provided the communications payload.

Arianespace

Launch provider

Specifications

Spacecraft

Launch Mass:

1,625 kg (3,582 lb.)

Redundancy:

Typically 2-for-1, minimum

Solar Arrays:

Multi-junction Gallium Arsenide cells

Stabilization:

Zero momentum; 3-axis stabilized

Pointing:

<0.12

circular error

Payload Power:

~1.4 kW

Propulsion:

Liquid bi-propellant transfer orbit system;
monopropellant (hydrazine) on-orbit

Mission Life:

10 year minimum, tank capacity for >12 years

Orbit:

136

East Longitude

Payload

Frequency:

S-band mobile communications, C-band
feeder link

Repeater:

S-band: 288 W multiport amplifier (three
5-for-4 groups of 24 W solid-state power
amplifiers)

C-band: 2-for-1 solid state power amplifiers
(13 W)

Antenna:

5.1 m unfurlable

Launch

Launch Vehicle:

Ariane 5

Site:

Kourou, French Guiana

Date:

July 5, 2002

N-STAR c was launched
aboard an Ariane 5 rocket.

N-STAR c Mission Profile