ISRO's successful test of Gaganyaan propulsion system paves way for crewed space mission

The Indian Space Research Organisation (ISRO) has achieved a major breakthrough in its space exploration efforts by successfully testing the Gaganyaan Service Module Propulsion System (SMPS) at the ISRO Propulsion Complex in Mahendragiri, Tamil Nadu.

This milestone was registered on July 19, 2023 marks a crucial step towards India's ambition of sending a crewed spaceflight mission into orbit and demonstrates growing prowess in the field of space exploration.

The Gaganyaan Mission, at its core, aims to showcase India's human spaceflight capabilities by launching a three-member crew into a 400-kilometer orbit around Earth for a three-day mission. This ambitious endeavor has been eagerly anticipated and has captured the imagination of the Indian public as it represents a defining moment in the nation's space exploration journey.

ISRO scientists have said that the the Gaganyaan mission will be launched on a human-rated version of the LVM3 (Launch Vehicle Mark 3). Various precursor missions are planned for demonstrating the Technology Preparedness Levels before carrying out the actual Human Space Flight mission. The 'astronaut designates' for the human space flight mission have already been identified; they are currently undergoing their mission specific training at Bengaluru.

The successful test of the SMPS is a momentous breakthrough in the development of the Gaganyaan spacecraft. The propulsion system is specifically designed to fulfill the requirements of the Orbital Module of the mission. It plays a crucial role in the spacecraft's journey, as it will be responsible for various essential functions, including orbit injection, circularization, on-orbit control, and de-boost maneuvers.

The recent test involved five liquid apogee motor (LAM) engines, each producing a thrust of 440 N, and sixteen reaction control system (RCS) thrusters, each generating a thrust of 100 N. These components are integral to the spacecraft's successful operation during the mission. The test, lasting 250 seconds, demonstrated the integrated performance of the SMPS, with the LAM engines firing continuously, and the RCS thrusters adhering to the planned test profile.

Prior to this successful Phase-2 test series, ISRO had already conducted five hot tests during the Phase-1 test series of the service system demonstration module, which accumulated a total test duration of 2750 seconds. ISRO reiterates the necessity to conduct rigorous testing procedures to ensure the utmost reliability and security of the Gaganyaan mission.

The development of the Gaganyaan Service Module Propulsion System has been a collaborative effort, with the Liquid Propulsion Systems Centre (LPSC) playing a pivotal role. LPSC is responsible for designing, developing, and realizing this critical propulsion system, and its achievements stand as a testament to the expertise and innovation within the Indian scientific community.

With the successful test of the SMPS, India is now one step closer to achieving its dream of launching a crewed spaceflight mission. The successful testing of the Gaganyaan Service Module Propulsion System (SMPS) is a considerable upliftment to India’s overall national pride and highlights the country's growing position in the global space exploration field.

Earlier this month, the first batch of crew recovery team of Mission Gaganyaan completed Phase-1 of training at the Indian Navy's Water Survival Training Facility (WSTF) at Kochi. Utilising the state of the art facility, the team comprising of Indian Naval Divers and Marine Commandos underwent recovery training of crew module in varied sea conditions.

The team trained at WSTF will now be involved in recovery of test launches planned by the Indian Space Research Organisation (ISRO) in the forthcoming months.

The Gaganyaan mission holds enormous significance for India's space program. It not only validates the country's technological capabilities but also opens up new opportunities for future space exploration missions.

Looking ahead, ISRO's focus will shift to further refining and integrating the Gaganyaan spacecraft components, conducting additional tests, and meticulously preparing for the upcoming crewed mission. Every successful step taken brings India closer to its ultimate goal of placing astronauts in space, joining the elite group of nations that have achieved this remarkable feat.