Satellites

Arianespace to launch ISRO-built DTH & telecom satellites

MUMBAI: Preparations are afoot to launch two satellites aboard Arianespace’s workhorse Ariane 5 rocket for delivery to GTO (geosynchronous transfer orbit). Hellas Sat 3 / Inmarsat S EAN and GSAT-17 have been scheduled to lift off from the spaceport in Kourou, French Guiana, on 28 June (Wednesday), during a 77-minute window opening at 20:59 GMT (4:59 p.m. EDT).

Encased in the 17-meter (55.8-foot) tall RUAG-manufactured fairing are the GSAT-17 and Hellas Sat 3 / Inmarsat S EAN satellites. GSAT-17, a 3,477-kg (7,665-pound) telecommunications satellite built by and for India, will launch in the lower position of the SYLDA payload adapter, Space Flight Insider reported.

One of the aims of the Ariane 5 mission is the launch of two satellites on a single vehicle. On the top of the around 54.8-meter (180-foot) rocket is a pair of satellites destined to provide telecommunications and direct-to-home (DTH) television services to their respective markets.

Sharing a single ride to orbit offers cost saving opportunities to the customers and is something at which Arianespace has become very adept. The France-based MNC has indeed been a leader in launching two large satellites to GTO for around 20 years.

GSAT-17, which has been built by the Indian Space Research Organization (ISRO), is constructed on the indigenous I-3K satellite bus. The chassis is outfitted with twin solar panels, capable of producing up to a total of 6,500 watts of DC power, tapering to 5,200 watts at the end of its 15-year design life. The satellite will provide telecommunications services, as well as support data relay and government functions, from its position at 93.5 degrees East via multiple C-band transponders.

The first, Hellas Sat 3, was built for and will be operated by Hellas Sat. It will provide telecommunications and DTH television services to customers in Europe, the Middle East, and Sub-Saharan African countries.

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