From orbit to understanding: how to read a changing Earth
Satellite images can reveal a remarkable perspective. Their meaning depends on the comparison behind them.
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Illustrative stock photograph. Slides summarise a Global Talks explainer.
From orbit to understanding: how to read a changing Earth
Satellite images can reveal a remarkable perspective. Their meaning depends on the comparison behind them.
Find out what the instrument sees
NASA’s Earth science programme uses observations to study connected systems including land, oceans and the atmosphere. Different instruments measure different properties; an image may represent something other than the colours a person…
Choose a fair comparison
Two pictures taken in different seasons may show differences that need seasonal context. A change in cloud cover, viewing angle or processing can also alter what is visible.
Connect the image to the ground
A satellite perspective is powerful because it can reveal patterns over wide areas. Local observations help explain what those patterns mean for a particular place.
Go beyond the headline
Read the full Global Talks explainer for context, the complete argument and background sources.