India’s Defence Research and Development Organisation (DRDO) has successfully flight-tested an indigenously developed High-Altitude Platform System (HAPS), reaching an altitude of 21 km and demonstrating its ability to operate for extended periods in the stratosphere.
The experimental flight reached 21 km above mean sea level and the platform remained at around 20 km for more than 30 minutes before being commanded to descend. It was subsequently recovered safely, while flight data collected during the mission was analysed to evaluate the system’s performance.
The trial is a significant step in the development of lighter-than-air platforms designed for long-endurance operations at high altitudes, with potential applications in persistent surveillance, communications and environmental or other monitoring missions.
Platform demonstrates sustained stratospheric operation
During the flight, the HAPS continuously transmitted real-time video and vehicle performance data to a ground control station. The system also carried multiple instrumentation and control systems, including an inertial measurement unit, GPS receiver, onboard cameras and altitude-control mechanisms.
According to the Ministry of Defence, the onboard systems and associated subsystems performed as intended during the trial.
Operating in the stratosphere gives such platforms the potential to remain over an area for significantly longer periods than conventional aircraft, while operating above much of the weather and air traffic encountered at lower altitudes.
The HAPS is being developed by the Aerial Delivery Research and Development Establishment (ADRDE), an Agra-based DRDO laboratory. The lighter-than-air platform is intended to provide persistent airborne capability without relying on conventional aircraft for continuous operations.
Multiple agencies involved in flight trial
The trial was conducted with the participation of the Indian Air Force, the Centre for Military Airworthiness and Certification (CEMILAC), the Directorate General of Civil Aviation (DGCA), the Airports Authority of India (AAI) and other civil authorities.
The involvement of multiple aviation and defence agencies reflects the operational and regulatory requirements associated with testing a high-altitude platform capable of entering the stratosphere.
Defence Minister Rajnath Singh congratulated DRDO, the Indian Air Force, public sector undertakings and industry partners involved in the programme.
Singh described the successful trial as an important milestone in India’s efforts to develop advanced aerospace technologies domestically and build long-endurance stratospheric platforms.
The latest test provides DRDO with additional flight-performance data as it continues development of the HAPS and evaluates its potential for sustained high-altitude operations.