India has taken another step towards developing long-endurance aerial platforms with the successful flight trial of an indigenously developed High-Altitude Platform (HAPS) by the Defence Research and Development Organisation (DRDO).

A HAPS is a lighter-than-air, long-endurance aerial platform designed to operate at very high altitudes. Such platforms can potentially support applications including aerial surveillance, intelligence gathering and earth observation.

Unlike conventional aircraft that need to return frequently, a long-endurance stratospheric platform is designed to remain aloft for extended periods. This makes the technology particularly interesting for persistent observation and communication-related applications.

The HAPS is being designed and developed by DRDO’s Aerial Delivery Research and Development Establishment (ADRDE), Agra.

The experimental flight climbed to an altitude of 21 kilometres above mean sea level (AMSL) before maintaining a steady altitude of 20 kilometres for more than 30 minutes. The platform was later brought down and successfully recovered, with its flight performance data subsequently analysed.

The trial marks an important stage in India’s efforts to develop a long-endurance stratospheric airship.

Watching From the Ground

The flight was closely monitored in real time from a Ground Control Station, where teams received video feeds and vehicle-parameter data throughout the trial. The experimental platform carried several systems to monitor and control its performance, including an inertial measurement unit, GPS receiver, onboard cameras and an altitude-control mechanism. Other instrumentation and control systems also supported the flight.

The flight was conducted in coordination with several organisations, including the Indian Air Force (IAF), Centre for Military Airworthiness and Certification (CEMILAC), Directorate General of Civil Aviation (DGCA), Airports Authority of India (AAI) and other civil authorities.

The successful trial reflects the coordination required to conduct experimental flights at such altitudes while monitoring the platform throughout its journey.

Defence Minister Rajnath Singh congratulated DRDO, the IAF, public sector undertakings and industry partners involved in the trial. He described the achievement as an important milestone in India’s Aatmanirbhar Bharat journey towards developing a long-endurance stratospheric airship.