PARIS — Ten years after it vacated its 31 degrees East orbital slot with the retirement of its Turksat 1C satellite, Turksat, Turkey's government-owned satellite operator, is returning to the now-crowded location with the Turksat 5A Ku-band satellite.

How much leeway it will have with respect to neighboring satellite operators — Arabsat, Eutelsat, Avanti and SES are all within half a degree — is unclear. Turksat officials agreed it will not be easy to carve out enough space for Turksat 5A’s . . .

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