Citing delays with Europe’s new Vega-C rocket, two Vega booster failures and the ongoing COVID-19 pandemic, the Italian Space Agency (ASI) has shifted the launch of the second COSMO-SkyMed Second Generation (CSG-2) Earth observation satellite to SpaceX’s Falcon 9 rocket.
“The delays, postponing the Vega-C Maiden Flight to Q1 2022, with a consequent tight schedule of launches in 2022, made the launch period of CSG-2 no longer compatible with the needs of the COSMO Mission. Since Arianespace backlog was already full on Soyuz and Ariane systems in 2021, it was not possible to have a European back-up solution compliant with the CSG-2 schedule, thus an alternative solution with the US provider SpaceX has been adopted allowing to keep the CSG-2 launch within the current year,” ASI said on its website.
PARIS, 17 December 2020 — On Tuesday, November 17, Arianespace announced the loss of the Vega VV17 mission, which was carrying two payloads, SEOSAT-Ingenio, an Earth-science observation satellite for the European Space Agency (ESA), on behalf of Spain’s Center for Development of Industrial Technology (CDTI), and TARANIS for France’s National Centre for Space Studies (CNES).
The first three stages functioned nominally until the ignition of the AVUM upper stage, eight minutes after liftoff. At that time, a degraded trajectory was detected, followed by a loss of control of the vehicle and the subsequent loss of the mission.
Engineers say they have identified what caused the loss of a European Vega rocket and its two satellites on Monday evening. The BBC reported:
The problem was traced to the actuators that change the direction of thrust on the Vega’s upper-stage engine.
When they received commands from the guidance, navigation and control (GNC) system, they turned the motor’s nozzle counter to the intended direction.
Roland Lagier, from Arianespace, the company that markets and launches Vega rockets, said cabling on the thrust vector control system must have been inverted when the upper-stage engine was assembled.
“This was of course a production and quality issue. It was a human error and not a design one,” the chief technical officer told reporters.
Lost in the failure were Spain’s SeoSat-Ingenio Earth observation satellite and France’s Taranis research spacecraft, which was to study high-atmosphere lightning.
Vega has compiled a record of 15 successes and two failures since its maiden flight on Feb. 13, 2012. The first failure occurred during the 15th flight on July 11, 2019. An investigation determined the most likely cause was a thermo-structural failure in the forward dome area of the Z23 second stage motor.
Vega made a successful return to flight on Sept. 3, 2020, by launching 53 small satellites on its first rideshare mission.