PARIS — The Arianespace launch consortium reported revenue of 1.4 billion euros ($1.6 billion) in 2018, flat from 2017, and a 16% decline in its backlog reflected the continued decline in the market for launching large geostationary-orbit telecommunications satellites.

That decline, which has already caused one large satellite builder — Maxar Technologies’ SSL — to prepare to quit the market, hit what may be rock bottom in 2018.

By Arianespace’s count, 22 GEO-orbit satellites open for commercial bidding were ordered in 2015. The market dropped to 15 . . .

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