Correct Option
The Indian Remote Sensing (IRS) satellite program constitutes one of the world's largest constellations of Earth observation satellites. These satellites are equipped with advanced sensors that capture high-resolution imagery, primarily utilized for natural resource management, environmental monitoring, and various developmental applications.
- Statement 1 (Assessment of crop productivity): IRS satellites are extensively used in agriculture for monitoring crop health, assessing yield, and facilitating agricultural planning. Techniques like the Normalized Difference Vegetation Index (NDVI) derived from satellite data are crucial for these assessments.
- Statement 2 (Locating groundwater resources): Remote sensing data from IRS satellites aids in identifying potential groundwater zones. This is achieved through hydro-geomorphological mapping, terrain analysis, and studying surface features indicative of subsurface water presence.
- Statement 3 (Mineral exploration): IRS satellites contribute to mineral exploration by providing data for geological mapping, identifying structural features, and detecting surface anomalies that may indicate the presence of mineral deposits.
Incorrect Options
- Statement 4 (Telecommunications): Telecommunications services are primarily facilitated by geostationary communication satellites, such as the INSAT and GSAT series, which are distinct from the Earth observation functions of IRS satellites.
- Statement 5 (Traffic studies): While satellite technology can play a role in urban planning, direct traffic studies are typically conducted using ground-based systems, Global Positioning System (GPS) data, and specialized urban monitoring satellites, rather than the standard applications of the IRS constellation.
Based on the above, statements 1, 2, and 3 are correct applications of Indian Remote Sensing satellites, while statements 4 and 5 are not. Therefore, option (a) is the correct answer. Options (b), (c), and (d) are incorrect as they either omit correct applications or include incorrect ones.