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A European mission to launch a satellite aboard Arianespace’s Vega rocket has come to a premature end after a “major anomaly” occurred just two minutes after liftoff. Part of the data for that time did not consist of proper flight data, but rather showed a diagnostic bit pattern of the computer of SRI 2, which was interpreted as flight data. The board was told that not all the conversions were protected because a maximum workload target of 80% had been set for the SRI computer. Of particular interest was the one that had worked in active mode and stopped functioning last, and for which certain information was therefore not available in the telemetry data (provision for transmission of this information to the ground was confined to whichever of the two units might fail first). Arianespace is a French-headquartered launch provider that’s overseen by the European Space Agency. This value is calculated as an indicator for alignment precision over time. The design of the SRI used in Ariane 5 is almost identical to that of Ariane 4, particularly with regard to the software. In Depth Analysis: Figuring out the Ariane 5 VA241 Anomaly.

The period selected for this continued alignment operation, 50 seconds after the start of flight mode, was based on the time needed for the ground equipment to resume full control of the launcher in the event of a hold.

Ariane 5 overview.

The achieved orbit shows a very large deviation of inclination while the perigee and apogee are fairly close to their target – ruling out any significant performance hits encountered on the way uphill which had been the initial suspicion after reports of a non-compliant orbit emerged Thursday night.

Flying considerably south of its planned trajectory, Ariane released its two passengers just on the edge of the visibility zone of their respective ground stations, explaining 2+ hour delay in confirming both were alive as they had to climb in altitude to become visible to tracking stations called up for their mission. Range Safety, with the notable exception of Russia & China, typically operates under firm rules that guide the termination of a flight. It is entirely possible (and very much indicated by video evidence) that Ariane 5 attained the improper azimuth as part of its initial roll and pitch maneuvers in progress from T+12 to T+32 seconds that were to align the vehicle with its due easterly launch path. Shortly after that time, the vehicle suddenly veered off its flight path, broke up, and exploded. Visibility conditions improved as forecast, however, and the launch was initiated. Satellite operators SES and YahSat confirmed in the overnight hours that both satellites had been acquired by ground stations and both were shown in a stabilized configuration after separation from the Ariane 5 launch vehicle. In addition, the satellites have to rotate their orbits since their perigee/apogee locations moved away from the equator due to Ariane’s improper ascent path. After the issue was corrected, the Soyuz rocket successfully launched in the same configuration in a subsequent uncrewed and then crewed missions. Returning to the software error, software is an expression of a highly detailed design and does not fail in the same sense as a mechanical system. Article Updated & Corrected at 2 UTC, Jan 27, on A Bizarre Failure Scenario Emerges for Ariane 5 Mission Anomaly with SES 14 & Al Yah 3, on Ariane 5 Launch Anomaly Leaves Uncertainty on Status of Commercial Satellite Duo, on Ariane 5 Reaches Launch Pad for Dual-Payload Delivery with SES 14 & Al Yah 3, on Photos: Ariane 5 Rolls to French Guiana Launch Pad for First Mission of 2018, on Photos: First Ariane 5 of 2018 Completes Assembly, A Bizarre Failure Scenario Emerges for Ariane 5 Mission Anomaly with SES 14 & Al Yah 3, Ariane 5 Launch Anomaly Leaves Uncertainty on Status of Commercial Satellite Duo, Ariane 5 Reaches Launch Pad for Dual-Payload Delivery with SES 14 & Al Yah 3, Photos: Ariane 5 Rolls to French Guiana Launch Pad for First Mission of 2018, Photos: First Ariane 5 of 2018 Completes Assembly. It was the decision to cease the processor operation that finally proved fatal. One peculiarity evident in the tracking map occurred just before the T+8-minute mark when the cursor depicting the actual position of the vehicle suddenly jumped from the ~111° azimuth onto the proper trajectory.
No direct reference to justification for this decision was found in the source code. The Range Operations Director continued reporting nominal onboard parameters through the burn of the first stage (which was true since performance was indeed nominal), but a glance toward a telemetry or radar-tracking-based map would have made what was happening obvious immediately. The defect on the Ariane 5was the result of several factors. In the case of Ariane 5, this resulted in the switching off of two still healthy critical units of equipment. 1. The rocket is designed to launch payloads up to 1,500 kg in weight into low Earth orbit. An underlying theme in the development of Ariane 5 is a bias toward the mitigation of random failure. ‘Data analyses are in progress to clarify the reasons for this failure’. Arianespace launch failure destroys military satellite, Apple’s AirPods Pro are $200 at Amazon and B&H Photo today, Plus, save up to $150 on the Samsung Galaxy S20 FE 5G, Apple’s AirPods Pro are back down to $200 at B&H Photo, If you want them at this price, here’s your chance (again), Sign up for the

In particular, there was no risk of lightning since the strength of the electric field measured at the launch site was negligible. Another fairly bizarre element of Thursday’s mission was the handling of the situation by Arianespace Public Affairs as well as mission officials at the Jupiter Control Center. Whether any of these criteria were violated on Thursday is impossible to judge from the data available at the moment, especially for the very early portion of the flight where video clearly shows Ariane 5 essentially passing directly over spectators watching from a public area. People have uploaded shorter copies, but here's a longer copy of the Ariane 5 rocket's ill-fated first launch, which ended in explosion back in 1996.

SES 14, using the all-electric Eurostar-3000EOR platform of Airbus, will need around four weeks longer to make it into the operational orbit, employing its advanced ion thrusters for the entirety of the transition.

A statement on Arianspace’s website said that “Data analyses are in progress to clarify the reasons for this failure” and that an “independent inquiry commission” would be set up in the coming hours. In the event of any kind of exception, according to the system specification, the failure should be indicated on the databus, the failure context should be stored in an EEPROM memory (which was recovered and read out for Ariane 5), and, finally, the SRI processor should be shut down.

Around 26 minutes into the livestream you can see the rocket’s first stage ignition come to an end, and soon afterwards the flight’s telemetry data appears to show its course diverging from the intended route. The results of the examination of this unit were very helpful in the analysis of the failure sequence. Inquiry Board Traces Ariane 5 Failure to Overflow Error. Given the large amount of documentation associated with any industrial application, the assumption, although agreed upon, was essentially obscured, although not deliberately, from any external review. The flight of the vehicle was nominal until approximately 37 seconds after liftoff. All appeared to be proceeding smoothly as Ariane 5 disappeared into the night sky and the Range Operations Manager at the Jupiter Control Room was calling out nominal performance parameters as the launcher reached key mission events – dropping its boosters at T+2 minutes and 19 seconds, separating the fairing at T+3:18 and handing from the large cryogenic first stage to the ESC-A second stage at the T+9-minute mark for the final push into orbit.


On June 4th, 1996, the very first Ariane 5 rocket ignited its engines and began speeding away from the coast of French Guiana.

Europe’s Ariane 5 appears to have gotten away with a black eye on Thursday when its 97th mission veered off course from the onset of the rocket’s climb, but still managed to deploy two innovative communications craft in a stable, but off-target orbit from where it will be up to the SES 14 and Al Yah 3 satellites to rectify the situation and maneuver into their operational slots above the equator.

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