Author Topic: LIVE: Ariane 5 ECA (VA237) - ViaSat-2, Eutelsat 172B, June 1, 2017  (Read 17093 times)

Offline pargoo

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Thank you :)

Offline FutureSpaceTourist

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Peter B. de Selding‏ @pbdes 8m8 minutes ago

Robotic arms w/ ion thrusters now positioned on @Eutelsat_SA 172B launched June 2, raising sat to GEO orbit; to take ~4 months. Service Q4.

https://twitter.com/pbdes/status/873094291731513345

Offline FutureSpaceTourist

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Peter B. de Selding‏ @pbdes 48m48 minutes ago

ViaSat-2 brdbnd sat completes chemical-fuel orbit-raise, now on electric; solar arrays deployed. @ViaSatInc doesnt allow detailed pic/image.

https://twitter.com/pbdes/status/877867942544891906

Online gongora

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[Space Intel Report] Interview: ViaSat President and COO Richard A. Baldridge
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Q: How long until ViaSat-2 gets to final GEO position?

A: We finished the chemical part of the orbit raising and the current assessment is October arrival on station. Our co-passenger [Eutelsat’s all-electric 172B] wasn’t determined initially, and turned out to have greater mass than most. A lighter co-passenger would have allowed more chemical propellant and a shorter overall orbit raising time. But we’re still happy with the trade-off, given that we’ll have the use of the payload capability for far longer than the difference in the orbit raising time.

Offline Lewis007

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The Eutelsat 172B spacecraft has reached geostationary orbit, breaking the record for the fastest satellite electric orbit raising

see: http://news.eutelsat.com/pressreleases/eutelsats-airbus-built-full-electric-eutelsat-172b-satellite-reaches-geostationary-orbit-2208095

Online gongora

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Tweet from Caleb Henry:
From @roscosmos, the electric propulsion thrusters that lifted Eutelsat-172b in record time were Russian.  https://www.roscosmos.ru/24291/

Offline Steven Pietrobon

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Bing translation.

https://www.roscosmos.ru/24291/

OKB Torch. New record of the EUTELSAT engines SPT-140
31.10.2017 15:24

The spacecraft (spacecraft) EUTELSAT 172, which is equipped with the SPT-140 electric motors, produced by the Kaliningrad OKB "Torch" (part of State "the"), beat the last record on the fastest decommissioning ( Geostationary orbit, using the SPT-140 electric motors. Only four months have elapsed since it was launched before the geostationary orbit was reached.

During the recovery phase, the motors apparatus worked successfully and withdrew the satellite to the target orbit. The fuel was used six times less than for satellites with chemical engines.

According to the plan, EUTELSAT 172 should start operating for commercial purposes in November of this year to provide communication, broadband and data collection services over the Asia-Pacific region. A satellite constructed by the Airbus for Eutelsat is designed for a 15-year resource. Further adjustments to the orbit of the spacecraft will also be provided by the electric motors produced in the OKB torch. The spacecraft was launched from Kourou on June 1, 2017, on the Ariane-5 launch vehicle.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Here's a NASA report on the SPT-140, from 20 years ago!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Lewis007

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