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July 26th, 2013
India’s INSAT-3D Weather Satellite Launched Successfully

Ariane 5 ECA Launch:

The Ariane 5 ECA (Cryogenic Evolution type A) – the most powerful version in the Ariane 5 range – was used for this flight. The Ariane 5 ECA is an improved Ariane 5 Generic launcher.

Although it has the same general architecture, a number of major changes were made to the basic structure of the Ariane 5 Generic version to increase thrust and enable it to carry heavier payloads into orbit.

Designed to place payloads weighing up to 9.6 tonnes into GTO, this increased capacity allows the Ariane 5 ECA to handle dual launches of very large satellites.

Given Arianespace now enjoys a full family of launch vehicles – following the introduction of the Soyuz and Vega rockets at the Spaceport – the company adopted a new numbering system to identify its missions with these three vehicles.

As such, Ariane 5 flights carry the “VA” designation, followed by the flight number. The “V” stands for “vol”, the French word for “flight”, while the “A” represents the use of an Ariane launch vehicle.

With the introduction of Soyuz at the Spaceport in 2011, Arianespace missions from South America with the medium-lift workhorse launcher are being designated “VS”, while flights with the lightweight Vega vehicle are referenced as “VV”, following its successful debut in 2012.

This mission was designated Flight VA214 in Arianespace’s launcher family numbering system and was the 214th launch since operations began with the Ariane series of vehicles in 1979, as well as the 70th flight for the heavy-lift Ariane 5 version.

The launcher had India’s INSAT-3D satellite installed in the lower position of its payload “stack”, with Europe’s Alphasat as the upper passenger.

The payload lift performance for this mission was 9,760 kg., which included a combined total of some 8,770 kg. for the two satellite passengers, as well as the launcher’s SYLDA dual-passenger dispenser system and satellite integration hardware.

INSAT-3D was developed by India’s Indian Space Research Organisation (ISRO) space agency and its ISRO Space Applications Centre, designed to provide meteorological observation and monitoring of land/ocean surfaces.

The satellite – which is adapted from India’s I-2K spacecraft bus – is equipped with a six-channel imager and 19-channel sounder, as well as a data relay transponder and a payload for satellite-aided search and rescue operations.

Once fueled, INSAT-3D had an estimated lift-off mass of 2,090 kg, and features eight new-generation digital signal processors and an 11-meter antenna reflector.

It also is configured with four technology demonstration payloads for ESA.

Deployment of Alphasat occurred first, at just under 28 minutes into the flight. This was followed by the release of the SYLDA dispenser, allowing the subsequent separation of INSAT-3D to complete the Arianespace mission 32 minutes after lift-off.

The previous Spaceport missions performed by Arianespace so far this year were the June 25 medium-lift Soyuz launch that orbited O3b Networks’ first four connectivity satellites; an Ariane 5 flight on June 5 with Europe’s fourth Automated Transfer Vehicle, which was Ariane’s heaviest payload ever; the May 7 lift-off of Vega on this lightweight vehicle’s second flight, carrying the Proba-V, VNREDSat-1 and ESTCube-1 satellites; and an Ariane 5 mission on February 7 with the Amazonas 3 and Azerspace/Africasat-1a passengers.

Completing the 2013 activity to date was a Soyuz launch from Kazakhstan’s Baikonur Cosmodrome on February 6
, conducted by Arianespace’s Starsem affiliate with six second-generation Globalstar satellites. It marked the fourth and final mission currently contracted by Globalstar with Arianespace/Starsem for the deployment of its second-generation satellite constellation.