SWOT Satellite Maps Ocean Floor with Advanced Data

NASA has recently developed a detailed map of the ocean floor using data from the Surface Water and Ocean Topography (SWOT) satellite. This advancement marks a significant step in understanding underwater features and global water dynamics, contributing to climate studies and oceanographic research.

About the SWOT satellite mission

The SWOT satellite, launched in 2022, is a joint mission between NASA and the French space agency CNES. Its primary objective is to measure and monitor changes in Earth’s water bodies over time, including oceans, rivers, lakes and reservoirs. The mission aims to provide high-resolution data for better understanding of water distribution and movement across the planet.

Key technological features

SWOT is equipped with the Ka-band Radar Interferometer (KaRIn), a specialised instrument that measures the height, width and elevation of surface water bodies. It works by sending microwave signals towards the Earth’s surface and analysing the return time, enabling precise mapping of water levels and flows. This technology allows scientists to track dynamic changes in water systems with unprecedented accuracy.

Global coverage and monitoring capacity

The satellite is capable of scanning nearly 90 per cent of the Earth’s surface every 21 days. It can observe almost all rivers wider than 330 feet and over one million lakes and reservoirs larger than five acres. Additionally, SWOT can monitor more than half of global large-scale floods during their lifecycle, making it a valuable tool for disaster management and planning.

Important Facts for Exams

• SWOT stands for Surface Water and Ocean Topography satellite.
• It is a joint mission of NASA and CNES, launched in 2022.
• KaRIn instrument measures water surface elevation using radar technology.
• It helps study ocean currents, floods and global water distribution.

Significance for climate and ocean studies

SWOT’s ability to detect fine variations in ocean surface elevations helps scientists study smaller currents and eddies, which play a crucial role in absorbing heat and carbon from the atmosphere. The new ocean floor mapping enhances understanding of underwater structures, supporting research on climate change, marine ecosystems and long-term environmental sustainability.