When Earth’s Surface Shifts, a New Satellite Will See It

NISAR, built jointly by NASA and India’s space agency and launched on Wednesday, will use radar to monitor tiny changes across our planet’s land and icy regions.

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NISAR — a NASA-India Collaboration — Will Study Earth With Radar. Here’s How to Watch the Launch.

A new Earth-observing satellite, built by NASA and India’s space agency, will be sent into orbit on Wednesday.

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Newark Airport Suffers Another Radar Outage

The air traffic control mishap early Friday morning added to disruptions in recent days that have intensified concerns about safety at one of the busiest U.S. airports.

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How Lost Radar and Silent Radios Have Upended Newark Air Travel

A technical outage in Philadelphia last week terrified air traffic controllers and stranded passengers. As the summer travel season looms, the F.A.A. is racing to address the problems.

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Canada Announces Arctic Radar Deal With Australia Amid Trump Threats

As President Trump talks about U.S. dominance of the Arctic, Canada says it will spend billions to defend the region, including buying new radar technology from Australia.

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