What is a FINDER device?

About FINDER device:

• The devices, called FINDERs( Finding Individuals for Disaster Emergency Response), use microwave radar sensors to find survivors underneath the rubble.
• It was designed to detect a human heartbeat buried beneath 30 feet of rubble.
• The radar illuminates the rubble pile and receives reflections back from a disaster site, including the victim.
• FINDER looks for changes in the reflection that indicate movement and then checks to see if those movements can be attributed to human heartbeats and respirations.
•  It can distinguish human respiration from animals or mechanical movements.

 

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Q1) What is a microwave?

Microwaves are defined as electromagnetic radiations with a frequency ranging between 300 MHz to 300 GHz. 

Source: NASA's heartbeat-detecting tech to help with Turkey earthquake relief effort