0127 GMT November 21, 2019
This follows another less-than-successful test earlier in the year, with the team now searching for answers less than year out from the scheduled launch, newatlas.com reported.
The ExoMars 2020 mission involves the ESA-built rover that will roam the surface for organic material and the Russian-built stationary surface platform, which will spend a year investigating the soil at the landing site. Both will lift off atop a Proton rocket and travel to the Red Planet inside a carrier module over a nine-month journey, before entering the atmosphere, deploying parachutes and firing braking engines in an attempt to reduce their velocity for a safe touchdown.
This process actually involves a set of two parachutes, each with their own pilot chutes, deploying in a sequence during the six hours between atmospheric entry and landing. The first-stage parachute has a 15-meter diameter and a larger, second-stage parachute has a 35-meter diameter, which will actually be the largest to ever descend to Mars.
Back in May, mission scientists tried out all four parachutes for the first time, releasing them from a stratospheric helium balloon at an altitude of 29 km. All of the chutes deployed correctly, but the team found both of the main parachutes suffered damage on the way down.
So the team made some alterations to the design and then conducted another run, this time focusing their attention on the larger main parachute. But the second test brought damage to the canopy in a similar fashion to the first one, with an attached mock carrier module left to fall to Earth with only the pilot chute to slow it down.
"It is disappointing that the precautionary design adaptations introduced following the anomalies of the last test have not helped us to pass the second test successfully, but as always we remain focused and are working to understand and correct the flaw in order to launch next year," said Francois Spoto, ESA's ExoMars team leader.
The team is now working through videos and hardware data recorded throughout the test to determine its next moves. Another high-altitude test is planned for the main parachute later in the year, and another for early 2020.
"Getting to Mars and in particular landing on Mars is very difficult," said Spoto.
"We are committed to flying a system that will safely deliver our payload to the surface of the Mars in order to conduct its unique science mission."