What is the resolution of CARTOSAT-2 and for what purpose are its images useful? What is the main…

Question

What is the resolution of CARTOSAT-2 and for what purpose are its images useful? What is the main difference between CARTOSAT-2 and IKONOS?

Ghissu Editorial · Accepted Answer

Cartosat-2 has a spatial resolution of about 0.8 metre, and its images are used for cartographic mapping, land records, urban and coastal planning, utility management and strategic surveillance. Unlike the US commercial IKONOS (about 1 metre), it is finer, indigenously built and government-controlled for India-centric use.

**Introduction**

Cartosat-2, an ISRO satellite, enhances India’s remote sensing with 0.8-meter resolution imagery, supporting land management, urban planning, and security, and aiding schemes like the Digital India Land Records Modernization Program⟦1⟧ and SVAMITVA in ==Andhra Pradesh==. These initiatives improve rural governance and land record accuracy, crucial for socio-economic development.

**Institutional Framework and Capabilities**

SKETCH: comparison | Cartosat-2 vs IKONOS
a: Cartosat-2
b: IKONOS
- Resolution :: 0.8 meters :: ~1 meter
- Origin :: Indigenous (ISRO) :: US commercial satellite
- Primary Use :: National security, land management :: Global commercial imagery
- Revisit Period :: ~4 days :: Variable, commercial scheduling
- Availability :: Limited, government-controlled :: Widely available globally

1. **High-Resolution Imaging**: Cartosat-2’s 0.8-meter resolution enables detailed mapping of land and urban infrastructure, essential for land record digitization and thematic mapping.  
2. **Multi-Purpose Applications**: Its images support cartographic mapping, coastal regulation, and utility management, benefiting ==Andhra Pradesh==’s agriculture and coastline management. These applications also assist in infrastructure monitoring and urban planning.

**Implementation Challenges and Comparative Outcomes**

1. **Limitations and Revisit Frequency**: Optical sensors face cloud cover and night-time limits; revisit period is ~4 days, prompting small satellite constellations for better coverage. This limitation affects real-time monitoring during adverse weather, partially mitigated by RISAT’s radar imaging.  
2. **Comparison with IKONOS**: Cartosat-2 is indigenous with 0.8-meter resolution focused on India’s strategic needs; IKONOS offers ~1-meter resolution, commercial global imagery, and higher costs. Cartosat-2’s government control ensures data security, unlike IKONOS’s commercial availability.

**Way Forward**

1. **Enhance Satellite Constellations**: Deploy small satellites to improve revisit frequency for disaster management and precision agriculture in ==Andhra Pradesh==.  
2. **Integrate Multi-Sensor Data**: Combine optical and radar data for all-weather monitoring, enhancing data reliability and operational flexibility.

**Conclusion**

Cartosat-2’s indigenous high-resolution imagery is vital for India’s strategic security and developmental planning, supporting governance and resource management effectively.

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