SWOT Satellite

Context

NASA has used data from the SWOT (Surface Water and Ocean Topography) satellite to create a new high-resolution map of the ocean floor, enhancing understanding of Earth’s water systems.

Q1. What is the SWOT Satellite?

1. It is an Earth observation satellite launched in 2022 as a joint mission of NASA & CNES (France).
2. Its main objective is to measure changes in Earth’s water bodies over time.
3. It provides detailed data on oceans, rivers, lakes, and reservoirs.

Q2. What are the key features of the SWOT Satellite?

1. It uses the Ka-band Radar Interferometer (KaRIn) to measure water surface height & elevation.
2. It tracks width, depth, and flow of water bodies with high precision.
3. It provides high spatial resolution data by using microwave signals.
4. It can scan about 90% of Earth’s surface every 21 days.
5. It covers over 55% of global floods during their lifecycle.

Q3. How does the SWOT Satellite work?

1. It sends microwave radar signals towards Earth’s surface.
2. The signals bounce back from water bodies, and the return time is measured.
3. This helps calculate surface height and movement of water.
4. It can detect small variations in elevation, even in ocean currents and eddies.

Q4. What is the significance of the SWOT Satellite?

1. It improves understanding of global water cycles and climate change.
2. It helps in monitoring floods, droughts, and water availability.
3. It enhances mapping of ocean currents and underwater features.
4. It supports research on heat and carbon absorption by oceans.
5. It aids in water resource management and disaster preparedness.

Q5. What is the coverage and capability of SWOT Satellite?

1. It can observe nearly all rivers wider than 330 feet.
2. It monitors over 1 million lakes and reservoirs larger than 5 acres.
3. It provides global-scale data with high precision and frequency.
4. It captures fine-scale ocean features like currents and eddies.

Conclusion

The SWOT satellite marks a major advancement in global water monitoring, enabling better understanding of climate change, ocean dynamics, and water resource management.