Mainstay of India’s satellite network after INSAT-1B After the end of service of INSAT-1B (INSAT-IB), which programme was expected to become the mainstay of India’s satellite communication network for the coming years?

Introduction / Context:
India’s national INSAT programme evolved across generations. After INSAT-1A and INSAT-1B, the roadmap pointed to indigenous follow-on satellites with improved payloads, capacity, and reliability to support telecom, TV, and meteorology services nationwide.

Given Data / Assumptions:

• INSAT-1B provided critical services for years.
• Next-generation plans aimed at self-reliance with higher capability platforms.
• International fleets (INTELSAT/ARABSAT) existed but were not intended to be India’s primary mainstay.

Concept / Approach:

The INSAT-2 series (e.g., INSAT-2A/2B/2C/2DT/2E) represented India’s indigenous second generation. It expanded transponder capacity and diversified services. Therefore, post-INSAT-1B, the strategic mainstay for continuity and growth was the INSAT-2 series rather than depending on external regional/global systems.

Step-by-Step Solution:

Verification / Alternative check:

Historical mission summaries show the transition to INSAT-2 class as India scaled up services and autonomy.

Why Other Options Are Wrong:

INTELSAT-V and ARABSAT are international systems; INSAT-1D is within the first-generation class and not the long-term mainstay; GSAT-4 only is too specific and not representative of the broader planned backbone.

Common Pitfalls:

Confusing temporary leasing or cooperative arrangements with the strategic national mainstay.

Final Answer:

INSAT-2 series