Tag Archives: Ariane V

Intelsat 37e & BSAT-4a launch aboard Ariane V

The busy launch week continues with Ariane V out of Kourou, French Guiana, placing a pair of geosynchronous commercial commsats into orbit:

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Ariane V launch abort after main engine start

A rare post-ignition abort ended the launch of Intelsat 37e and BSAT 4a before it ever really started.  Like the Space Shuttle, Ariane V has a cryogenic main engine and a pair of solid rocket motors strapped to the sides.  The main engine requires a few seconds to get up to full thrust before the solids can be ignited.  Thus, it is entirely possible to abort after ignition but before departing the pad.  No word yet on the cause of the abort nor how soon launch can be attempted again, but while engineers review the data, the vehicle will be rolled back to its assembly building anyway.  This is necessary to reconnect the umbilicals that were jettisoned in the final seconds of the countdown.

The two payloads are commsats destined for geosynchronous transfer orbits.  Intelsat 37e, built by Boeing, will provide communication services to the Americas, Europe, and the Mideast.  BSAT 4A, built by Space Systems Loral, will provide television coverage in Japan for the Broadcasting Satellite System Corporation.

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Ariane V launch of HellasSat 3 & GSAT 17

Ariane V has added to an already busy launch week with a successful liftoff, placing two geosynchronous commsats onto the geosynchronous transfer orbit.  HellasSat 3/Inmarsat -S-EAN, a spacecraft jointly owned by Hellas Sat and Inmarsat, will provide S-band and Ku-band services to customers in Europe, the Mideast, and Africa.  GSAT 17, a civilian commsat operated by the Indian Space Research Organization, will provide C-band services to customers in India, mainly television services.  This was the 80th successful consecutive Ariane V launch.

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Another successful Ariane V mission: Sky Brasil-1 and Telkom-3S

Just a few hours ago, Arianespace racked up their first heavy launch of the year, sending a dual-payload Ariane V with two geosynchronous commsats aboard from Kourou, French Guiana.  The payloads are Sky Brasil-1, to serve customers in Brazil, and Telkom 3S, to serve customers in Indonesia.  This was the ninety-first Ariane V mission overall.  The rocket has enjoyed a strong record, with only two failures and two partial failures out of 91 flights, and it has had no failures of any kind in the last seventy-six missions.

Next flight of 2017 will be a PSLV from India, to launch in just a few hours with a big mapping satellite and a veritable horde of 103 smallsats.  I will write about it tomorrow.  😉

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Three days, three launches: ERG, Star One D1/JCSAT 15, and TanSat

2016 is wrapping up with some fireworks: three orbital rocket launches this week, and then possibly up to three more next week!

First off, on Tuesday, the Exploration of Energization and Radiation in Geospace, or ERG, spacecraft (to be renamed Arase after postlaunch checkout, after a river near the launch site) blasted off from the Uchinoura Space Center on the island of Kyushu, Japan, atop an Epsilon rocket.  The all-solid-prop Epsilon is a lower-cost replacement to the legacy Mu series of lighter-weight rockets, designed to require a very small launch team and capable of rapid deployment and hopefully to become a strong commercial contender internationally.  This is only its second flight.  Epsilon’s prime contractor is IHI Aerospace; Mitsubishi Heavy Industries, which builds the much larger H-II rocket, is a supplier, as is NEC.  The payload, ERG, will be operated by JAXA on a highly elliptical orbit that will force it to pass repeatedly through the Van Allen Belts for the purpose of better understanding them.  It will join two NASA spacecraft already on that mission, permitting three-way observation.

Then there were two launches yesterday.  First, from Kourou Space Centre in French Guiana, an Ariane V heavy lift rocket lifted two commsats to geosynchronous transfer orbit: Star One D1, to provide television and telecommunications services to South America for Embratel Star One of Brazil, and JCSAT 15, to provide television services for SKY Perfect JSAT Corp of Japan.

 

And then overnight, a scientific Earth observation satellite designed to monitor CO2 levels, TanSat, launched into polar orbit aboard a Long March 2D rocket from Jiuquan in northern China.  The spacecraft will be capable of mapping CO2 concentrations down to four parts per million worldwide, and also carries instruments relating to cloud and aerosol detection.  Don’t be alarmed by all the sparklies you see falling — those are sheets of ice illuminated by the brilliant rocket plume.  Ice formation is extremely common on liquid-propellant rockets, since the oxidizer at minimum is chilled to cryogenic temperatures.

All of these launches were completely successful.  There are three more launches planned for 2016, and hopefully they will go just as well: another Long March 2D, a Long March 3B, and a Proton.

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Launch of Soyuz MS-03 with the ISS crew and Ariane V with Galileo satellites

Today, two rockets lifted off.  First, from Kourou in French Guiana, an Ariane V launched the next five elements of the Galileo satellite navigation constellation:

 

Then, from Baikonur Cosmodrome in Kazakhstan, Soyuz MS-03 blasted off.  The crew are Russian Soyuz commander Oleg Novitskiy, NASA astronaut Peggy Whitson (who, with this launch, has broken the record for oldest female astronaut previously held by Barbara Morgan), and French astronaut Thomas Pesquet of ESA.

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Ariane & New Shepard both fly!

Ariane V completed another flawless mission from Kourou, French Guiana yesterday, placing into orbit Sky Muster 2 for Australia and GSAT 18 for India.  Both are geosynchronous commsats, the mainstay of Ariane V’s customer base.

And also yesterday, Blue Origin completed the fifth flight of their New Shepherd reusable suborbital rocket.  This flight did continue to test the rocket, but that wasn’t the main focus.  This mission was an inflight abort test.  The booster did not simulate an emergency; after the spacecraft separated, it continued merrily along its way (albeit at lower thrust to compensate for the loss of mass) and returned neatly to Earth on its own.  The escape looked a bit, well, “blarg-tastic” is the word that came to mind for me, as it yawed around dramatically.  I would bet that Blue Origin will be studying the data from sensors inside to make sure G-loads didn’t exceed human tolerance; the point of an escape isn’t to be comfy, but to be survivable.  Nevertheless, this fifth flight is expected to be the final flight for this particular vehicle.

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