ESA's Hera asteroid mission has completed acoustic testing, confirming the spacecraft can withstand the sound of its own lift-off into orbit. Testing took place within the Agency's Large European Acoustic Facility at the ESTEC Test Center in the Netherlands. This is Europe's largest and most powerful sound system, fitted with a quartet of noise horns that can generate more than 154 decibels of extreme noise.

Diego Escorial Olmos, Hera system engineer comments, "Launch will be the single most stressful day of Hera's life, so we have worked hard to simulate it during our mechanical test phase, first by vibrating the spacecraft on the ESTEC Test Center's shaker tables, and now by blasting it with a noise profile sourced from our launch provider, to be as true to life as possible."

The LEAF chamber stands 11 m wide by 9 m deep and 16.4 m high. One of its walls is embedded with a set of enormous sound horns. Nitrogen shot through the horns can produce a range of noise up to more than 154 decibels, like standing close to multiple jets taking off at once.

On Nov. 10, journalists were given an up-close view of two very special spacecraft that will soon empower weather services in Europe with more and higher quality data for weather forecasting.

Metop Second Generation A1 and B1 (Metop-SGA1 and Metop-SGB1) are the first pair of a total of six satellites in the EUMETSAT Polar System—Second Generation (EPS-SG) system.

The first two satellites are undergoing testing and integration of their instruments at the Airbus Defense and Space cleanroom in Toulouse, France. It is anticipated they will be launched in 2025–2026 into their low-Earth, polar orbit, at about 835km altitude.

"The multi-billion euro EPS-SG system will be the main source of data for complex computer modeling used for advanced weather forecasting from 12 hours to 10 days ahead," EUMETSAT's EPS-SG Program Manager Fran Martinez Fadrique said.