Talk:Foton (satellite)

Good info

Introduction: The Foton satellite is derived from the Vostok family of manned capsules as used by Yuri Gagarin. The manufacturer is TsSKB from Samara, with its subsidiary KB Foton responsible for the design. The spacecraft (mass: 6.4 tons, length: 6.2 m) consists of three main components: the re-entry capsule, the service module and the external battery pack. Foton is capable of carrying up to 500 kg of scientific payload.

Re-entry capsule: The re-entry capsule, a 2.2 m diameter sphere with a mass of around 2.4 tons, is the only retrievable (and re-usable) part of the satellite. The capsule houses the scientific payload and the landing parachute. It is equipped with three circular hatches, two on opposite sides for payload installation and removal, with a third hatch giving access to the parachute trunk. The capsule s aluminum-alloy structure is covered with ablative material for protection against frictional heat during re-entry. Landing is assisted by parachutes and retro-rockets to cushion the impact on the ground.

Service module: The service module is 3.2 m long and 2.5 m wide. It contains the attitude control system, the telemetry/telecommand equipment and the retrorocket. The attitude control system incorporates nitrogen jets and Earth horizon sensors for alignment of the spacecraft in preparation for its re-entry. While orbiting, the attitude control system is not used, leaving the spacecraft slowly spinning (without significantly affecting the level of microgravity, which is better than 10-5g). Firing the retrorocket reduces the spacecraft s velocity so that it falls into a lower orbit and reenters the atmosphere. The service module remains attached to the re-entry capsule by four retaining straps until the retrorocket burn is over.

Battery pack: The battery pack is a 1.8 m diameter cylindrical section, capped by domed ends and attached to the re-entry capsule by four legs. It provides on average 400 W of electrical power per day (peak power: 700 W). The battery pack is jettisoned before re-entry. source --Craigboy (talk) 19:48, 16 December 2012 (UTC)

http://wsn.spaceflight.esa.int/docs/EuropeanUserGuide/chapter_6_foton.pdf --Craigboy (talk) 19:57, 16 December 2012 (UTC)

Foton-M4

Apparently there's a Foton launch planned for 2014.

Here's more info--Craigboy (talk) 20:22, 16 December 2012 (UTC)

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Merging

Foton-M is an variant of baseline Foton satellite with moderate modifications. It would be more convenient to read the article and also help make the satellite families to be clear. PSR B1937+21 (talk) 15:58, 1 April 2016 (UTC)

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