Economy
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Updated on 14th November 2025, 1:09 AM
Author
Aditi Singh | Whalesbook News Team
Satellite data measuring nighttime lights (NTL) is emerging as a powerful tool to estimate economic activity in India, especially at state and district levels where official statistics can be delayed or sparse. This method, which tracks electricity consumption visible from space, shows strong alignment with official GDP figures, even during downturns. It offers a faster, cheaper, and more spatially detailed view of growth, helping policymakers and investors identify promising regions and track development.
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Satellite-based nighttime lights (NTL) data uses sensors to detect artificial light from Earth's surface, reflecting electricity consumption by homes, businesses, and factories. Brighter areas typically indicate higher production and economic activity. This NTL intensity or its growth over time serves as a high-frequency proxy for economic activity, increasingly used to estimate subnational Gross Domestic Product (GDP) and complement official data more affordably and quickly.
Research between 2012 and 2022 shows NTL data closely tracks India's aggregate GDP, including sharp dips during the 2020 pandemic. At the state level, NTL correlates well with Gross State Domestic Product (GSDP) for both large economies like Maharashtra and developing ones like Bihar. Interestingly, Bihar's NTL growth has outpaced its GSDP, suggesting rapid progress in electrification, urbanization, and possibly informal sector growth not fully captured by traditional metrics.
Uses include nowcasting (real-time growth estimates), subnational monitoring (tracking regional progress), policy evaluation (impact of infrastructure projects), crisis response (identifying disruptions), and urban/industrial planning. Limitations involve under-representation of rural areas and noise from non-economic lights or energy-efficient lighting.
Recommendations include integrating NTL data into official statistics by the Ministry of Statistics and Programme Implementation (MoSPI) for quarterly State GDP assessments, and its use by state governments to identify infrastructure gaps.
Impact: This news directly impacts Indian businesses and investors by providing a novel, real-time, and granular tool to assess economic performance and identify investment opportunities, potentially leading to more informed financial decisions and resource allocation. Rating: 8/10.
Difficult Terms: Satellite-based nighttime lights (NTL) data: Information collected by satellites that measures artificial light emitted from the Earth's surface at night. Economic activity: The production and consumption of goods and services in an economy. Subnational GDP: Economic output measured at a level below the national level, such as for states or districts. High-frequency proxy: A metric that can be measured and updated very often, providing a near real-time indication of a trend or activity. Aggregate GDP: The total value of all goods and services produced in a country. Gross State Domestic Product (GSDP): The total value of goods and services produced within a specific state in a country. Co-movement: The tendency for two or more variables to move in the same direction. Electrification: The process of supplying electricity to an area. Urbanization: The process of populations shifting from rural to urban areas. Informal sector: Economic activities that are not taxed or monitored by the government. Nowcasting: Predicting current conditions, especially economic ones, based on available real-time data. Ministry of Statistics and Programme Implementation (MoSPI): The Indian government ministry responsible for statistical activities and implementing government programmes.