[Answered] Why is the Indian Regional Navigational Satellite System [IRNSS] needed? Explain? Also discuss the recent issues and challenges in achieving its full potential?

Introduction

NavIC reduced to 3-4 functional satellites after IRNSS-1F atomic clock failure (March 2026). the system is facing a critical juncture due to recent hardware failures that have temporarily hindered its full operational potential.

Why is IRNSS (NavIC) Needed?

1. IRNSS (NavIC) is India’s indigenous regional satellite navigation system designed to provide accurate positioning, navigation, and timing (PNT) services over India and up to 1,500 km around it.
2. The primary driver for NavIC is Strategic Autonomy. India realized the vulnerability of depending on foreign systems (like the US-owned GPS) during the 1999 Kargil War, when the US denied India vital GPS data for the region.

Strategic Need for IRNSS/NavIC

1. Regional Precision and Urban Canyon Performance: Unlike GPS (which mostly uses the L-band), NavIC uses both L5 and S-band (Dual Frequency) frequencies. This allows for better atmospheric correction, providing accuracy of <10 meters over the Indian landmass (compared to GPS’s ~20 meters). NavIC’s geostationary satellites are positioned directly over India, offering better signals in dense cities and forests where global satellites might be blocked.
2. Geo Strategic Benefits: Ensures strategic autonomy by ending over-reliance on foreign systems (US GPS, Russian GLONASS, Chinese BeiDou).
3. Navi-Stack: Navigation systems are critical for logistics, e-commerce, and infrastructure planning; supports transportation, fleet management, and delivery systems. Enhances precision in surveying and large infrastructure projects. For Example- NavIC in Indian Railways’ tracking systems.
4. Economic Indigenization: Reduces reliance on foreign technology; encourages domestic innovation in space and electronics sectors; aligns with Atmanirbhar Bharat goals. it reduces foreign exchange outflow on foreign GNSS services and enables value-added services in agriculture, logistics, and smart cities.
5. Social Applications:

• Agriculture and Resource Management: Enables precision farming and irrigation planning. Supports fisheries and resource mapping. For Example- Fishermen in Tamil Nadu use NavIC-enabled devices for navigation and safety alerts.
• Disaster Management: Essential for real-time tracking during floods, cyclones, and earthquakes. For Example- Cyclone tracking and evacuation planning during Cyclone Amphan.

Recent Issues and Challenges

The system has faced persistent technical and operational hurdles:

1. Atomic Clock Failures: IRNSS-1F’s rubidium atomic clock stopped functioning on 13 March 2026 after completing its 10-year design life. Multiple first-generation satellites (1A, 1B, 1C) suffered similar failures early, reducing the functional constellation to only 3-4 satellites providing positioning data.
2. Launch and Orbit Issues: NVS-02 (second new-generation satellite, January 2025) failed to reach final orbit due to electrical failure in the oxidiser line pyro valve, as confirmed by ISRO’s review committee.
3. User Segment Delays: CAG 2018 report highlighted that despite ₹200 crore approval in 2006, user receiver development began only in 2017, wasting satellite mission life.
4. Limited Coverage and Interoperability: With fewer than seven operational satellites, full 24×7 coverage and sub-10-metre accuracy are compromised. New-generation NVS satellites add L1 frequency for better GNSS interoperability, but rollout is slow.

These issues delay full potential: aviation, shipping, and disaster management cannot fully transition to NavIC, while strategic users remain partially dependent on foreign systems.

Way Forward

1. Expedite launch of additional NVS satellites with indigenous atomic clocks and L1 signals.
2. Accelerate user receiver integration in all smartphones, vehicles, and wearables through mandatory standards.
3. Strengthen ground segment with real-time monitoring and redundancy.
4. Expand applications via AIKosha platform and iGOT training for wider adoption.
5. Allocate dedicated funding in future budgets for constellation replenishment and R&D.

Conclusion

Technological self-reliance, strengthening NavIC will secure India’s strategic autonomy and digital future, transforming it into a global leader in space-based navigation systems.