Assisted reentry: ESA’s satellite likely to fall over Atlantic Ocean on July 28

This will allow the satellite to turn upside down and use thrusters to reduce its orbit.

Since June 19, the satellite has been falling by around one kilometer per day from its operating orbit height of 320 km. 

Aeolus performed its first reentry maneuver on Monday, July 24, which reduced the height to 155 miles (250 kilometers). 

#Aeolus reentry: a breakdown

Check out this animation showing the key stages in Aeolus' first-of-its-kind assisted reentry.

From 'slews' to thruster burns to satellite commands, this is our plan, happening now, to guide @ESA_Aeolus's descent 🕹️🛰️👇🔥👉https://t.co/ZzbmisQ8jn pic.twitter.com/UsjaSznOCR

— ESA Operations (@esaoperations) July 26, 2023

Four additional burning maneuvers are expected on Thursday, July 27, which will help to decrease the orbit further. 

"A final command [on July 28] will guide Aeolus home from an altitude of 150 km to just 120 km [93 to 75 miles]. Then, the satellite will reenter," mentioned the ESA's live blog. 

Reentry will most likely take place over the Atlantic Ocean roughly five hours after the spacecraft receives the last maneuver order. 

The exact reentry position is yet to be confirmed

Following the last commands, Aeolus will enter the “passivation” state, where all energy aboard the spacecraft will be turned off. This state may help to avoid the possibility of any "explosions and fragmentation events," which would otherwise result in the release of large chunks of space debris.

Most of this satellite's parts will burn up during the violent atmospheric reentry to Earth, while some will fall into a stretch of the ocean just below the Aeolus's trajectory. 

Initially, this satellite was not designed for aided reentry. In recent years, only assisted reentry of rockets over a designated open ocean region has taken place.

If all goes as planned, it will be a significant milestone in spaceflight. 

This 3,000-pound (1,360 kilograms) satellite was launched in 2018. The wind monitoring satellite was supposed to last three years, but Aeolus outlived its mission life and orbited our planet for nearly five years.