Analog Experiments: Attempt to Simulate Space on Earth

ISRO’s Gyanex: Simulating Space, One Step at a Time

10 days, 11 experiments, and three astronauts confined within a small mock-up spacecraft simulator in Bengaluru — this was Gyanex-1, the first of India’s analog experiments under the Gaganyaan Programme. With human spaceflight scheduled for late 2025, ISRO’s Human Space Flight Centre (HSFC) has turned to this Earth-bound laboratory to validate equipment, train astronauts, and simulate conditions no Indian has yet experienced. These efforts extend beyond Gaganyaan, with experiments in Ladakh mimicking extraterrestrial bases. But how much ground can a gravity-bound simulation really cover?

Why Gyanex is a Break From the Norm

While ISRO has been synonymous with satellites, launch vehicles, and robotic missions, human spaceflight represents a paradigmatic shift in focus. Unlike Chandrayaan or Mangalyaan, Gaganyaan involves human fragility: isolation, decision-making under stress, and physical vulnerability to high-radiation conditions. Analog experiments like Gyanex are ISRO’s way of navigating this uncharted territory, refining human-centric protocols before the risks multiply exponentially in orbit.

The 10-day mission conducted by Group Captain Angad Pratap and his team marked a new milestone. But the more striking departure lies in the Ladakh-based missions. The Tso Kar Valley Mission, for example, used the Himalayan Outpost for Planetary Exploration (HOPE) habitat to simulate Martian conditions: low pressure, extreme ultraviolet radiation, and saline permafrost. Similarly, the Ladakh Human Analog Mission experimented with dwellings for outposts in barren extraterrestrial environments. This kind of strategic foresight — testing both human endurance in Bengaluru and planetary habitats in Ladakh — signals ISRO’s leap from regional to interplanetary relevance.

The Institutional Machinery at Work

At the heart of these experiments lies ISRO’s Human Space Flight Centre (HSFC), a division established in 2019 as a dedicated vehicle for all matters human spaceflight. Tasked not just with selecting astronauts but also with conceptualizing training modules, life support systems, and extravehicular mobility units, the HSFC acts as the operational nerve center. Meanwhile, agencies like DRDO chipped in during Gyanex-1 by providing specially developed astronaut food — an unglamorous but lifesaving advancement for sustained missions.

Interestingly, the absence of microgravity — the defining condition of space — limits analog experiments like Gyanex. Short of parabolic flights or drop towers, artificial gravity remains an unresolved front. Yet these terrestrial missions manage one critical function: your spacecraft might perform perfectly in simulations, but how do its human occupants fare? Gyanex bridges that gap, albeit with Earth’s gravity intact.

The Data Beneath the Headlines

ISRO portrays Gyanex as a vital rung on India’s human spaceflight ladder, but claims often conceal complexity. According to reports, Gyanex-1 assessed 11 science experiments as astronauts conducted tests, tracked health metrics, and adhered to stringent routines. However, without comparative public data — on crew stress responses, post-mission recovery times, or decision-making lapses — the impact of such missions remains opaque.

Another metric worth interrogating is cost-efficiency. While Gaganyaan comes with an overall budget of ₹9,023 crore, analog missions like Gyanex represent micro-cost expenditures within this envelope. Is ₹15–20 crore for analog simulations sufficient to cover all critical research? Here, ISRO faces a paradox: even the "cheapest" measures for human-centred spaceflight eclipse prior uncrewed budgets. For example, the Mangalyaan Mars mission cost ₹450 crore in total, nearly a rounding error for human missions.

Globally, nations like the United States also conduct analog experiments, yet the divergence is stark. NASA’s HI-SEAS program, situated in a Hawaiian volcanic terrain, simulates conditions for MaRS and Moon missions with precision protocols, including 12–24-month confinement periods. ISRO’s shorter, 10-day tests, while valuable, suffer by comparison in scale and ambition.

Uncomfortable Questions: What Gyanex Isn’t Asking

One uncomfortable question arises immediately: is ISRO merely following global trends, rather than innovating? NASA, ESA, and even CSA (Canadian Space Agency) operate analog mission programs with greater international collaboration and funding networks. Gyanex, in contrast, appears insular in its methodology. How much insight can be generated if ISRO’s missions lack cross-border partnerships or peer-reviewed accessibility?

Another point of skepticism involves India’s wider techno-scientific ecosystem. Does the Gyanex project adequately integrate India’s academic institutions, such as IISc or IITs, into applied research that could support missions? Without involving higher education, missions risk siloed development — a problem familiar from other Indian developmental initiatives, especially in health and rural tech.

State variation is yet another blindspot. Most of India’s human-spaceflight stakeholders — HSFC, DRDO, and HAL — are concentrated geographically. Yet visionary projects, such as India’s crewed missions to the Moon or Mars, could benefit from pan-Indian contributions via regional institutions, centers, or consortia. Broader institutional inclusion remains elusive.

Comparing with the Global Standard: NASA’s Playbook

NASA’s analog program, particularly through HI-SEAS (Hawaii Space Exploration Analog and Simulation), serves as a useful benchmark. Its most ambitious missions last up to a year, include habitat-dwellers from multinational teams, and provide access to curated scholarly data. By anchoring their simulations in Mars-like terrains with comprehensive psychological assessments, NASA has set a high standard for human-spaceflight preparation.

In contrast, ISRO’s analog missions have shorter timelines (10 days versus 12–24 months) and limited public dissemination of results. This relative opacity limits collaborative possibilities, both scientific and diplomatic. Were ISRO to adopt NASA’s more public-facing model, Indian Mars ambitions could gain global legitimacy.

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