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The Launch Segment has 3 primary components:
1. Launch Vehicle: an Ariane 5 ECA with the cryogenic upper stage. It will be provided in the single launch configuration, with a long payload fairing providing a maximum 4.57 meter static diameter and useable length of 16.19 meters.
2. Payload Adapter, comprising the Cone 3936 plus ACU 2624 lower cylinder and clamp-band, which provides the separating mechanical and electrical interface between the JWST Observatory and the Launch Vehicle.
3. Launch campaign preparation and launch campaign.
The European Space Agency (ESA) will provide the launch vehicle and the payload adapter to the JWST Mission. The launch campaign preparation and launch campaign is the mutual responsibility of NASA, ESA, NGST, and Arianespace.
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