Isro aborted SpaDeX docking after satellites triggered safe mode in space

ISRO Spadex: The latest attempt, which began just after midnight, saw Isro successfully narrow the distance between two satellites from 230 meters to 15 meters using the slow drift technique.

In Short

• Both satellites were primed for docking on Sunday
• Isro successfully narrowed the distance between two satellites
• However, the satellites triggered safe mode and the docking was aborted

The Indian Space Research Organisation (Isro) aborted docking the two satellites, part of the Space Docking Experiment (SpaDeX) docking, marking the third postponement of this crucial mission on Sunday morning.

The latest attempt, which began just after midnight, saw Isro successfully narrow the distance between two satellites from 230 meters to 15 meters using the slow drift technique.

At that point, both satellites were primed for docking, raising hopes for a successful connection.

However, when the team attempted to further reduce the distance from 15 to 3 meters, complications arose.

Despite stabilising the drift at zero degrees, a delay in receiving signals from a critical proximity and docking sensor was detected. This sensor is essential for ensuring that the satellites align perfectly during the docking process; even a slight directional deviation can jeopardise success.

As a precautionary measure, Isro's onboard systems automatically triggered safe mode moved both satellites to a safe distance to prevent any potential mishaps.

Officials within Isro, on condition of anonymity, indicated that the issue with the proximity and docking sensor prompted the decision to abort the attempt.

The organisation is now conducting a detailed assessment to troubleshoot this problem before attempting another docking. Latest observations show that the two satellites have already moved away from each other and separated by over eight kilometres.

This mission is critical for India as it aims to become only the fourth country in the world—after the United States, Russia, and China—to achieve successful satellite docking capabilities.

The SpaDeX mission is designed to demonstrate essential technologies for future space missions, including satellite servicing and space station operations.

As scientists analyse data from this latest attempt, they remain optimistic about future opportunities.

However, if sensor issues persist, it may delay subsequent attempts until visibility conditions improve. The complexity of space docking points to the challenges faced by Isro as it pushes forward in its ambitious space exploration agenda.