ISRO gears up for crucial unmanned flight test in Gaganyaan Mission preparation

The Indian Space Research Organisation (ISRO) is gearing up to initiate unmanned flight tests soon. The forthcoming Flight Test Vehicle Abort mission-1 is slated to showcase the  real time capabilities of the Crew Escape System, marking a pivotal moment in the program's development.

Mission Gaganyaan:
ISRO to commence unmanned flight tests for the Gaganyaan mission. 

Preparations for the Flight Test Vehicle Abort Mission-1 (TV-D1), which demonstrates the performance of the Crew Escape System, are underway.https://t.co/HSY0qfVDEH @indiannavy #Gaganyaan pic.twitter.com/XszSDEqs7w

— ISRO (@isro) October 7, 2023

At the heart of the Gaganyaan mission lies the Crew Module (CM), an airtight completely insulated environment that will house astronauts in earthlike atmospheric conditions. According to ISRO the CM, now in various stages of advancement, has reached a critical juncture with the completion of integration and testing for the first development flight Test Vehicle (TV-D1). This unpressurised CM prototype mirrors the size and mass of its final counterpart, including all essential systems for deceleration and recovery. The module has an array of parachutes, recovery aids, actuation systems, and pyrotechnics. Dual redundant avionics systems within the CM ensure impeccable functionality across navigation, sequencing, telemetry, instrumentation, and power. Furthermore, the CM's extensive instrumentation will capture flight data, facilitating comprehensive system evaluation, stated ISRO in an official statement .

Post-touchdown in the Bay of Bengal, a specialised vessel and a dedicated team from the Indian Navy will recover the Crew Module. The launch of the first development flight Test Vehicle (TV-D1) signals a long- awaited milestone, featuring a single-stage liquid rocket purpose-built for this abort mission. The payload encompasses the Crew Module (CM) and Crew Escape Systems (CES) complete with fast-acting solid motors, alongside the CM fairing (CMF) and Interface Adapters.

The upcoming flight test will replicate an abort scenario during ascent, simulating a Mach number of 1.2, as anticipated in the Gaganyaan mission. At approximately 17 kilometres above the Earth's surface, the CES will disengage from the Test Vehicle, initiating an autonomous abort sequence. This sequence will culminate in the safe separation and touchdown of the CM in the sea, approximately 10 kilometres off the coast of Sriharikota.

Having undergone the preliminary electrical testing in ISRO's Bengaluru facility, the Crew Module arrived at SDSC-SHAR on 13th August. In the particular facility it will undergo vibration tests and pre-integration with the Crew Escape System before its final integration onto the Test Vehicle at the Launch Pad.

 This critical mission represents a near-complete system integration, setting the stage for subsequent qualification tests and unmanned missions, propelling India closer to its Gaganyaan mission with Indian Astronauts or Vyomnauts.