pulsing in a Mayday pattern

[kingston_123]

Nasa scientist says to Max about a satellite which is coming towards the earth:

Hey, Max, take a look. I'm picking up exhaust flares, and they're pulsing in a Mayday pattern.

What is the meaning of "pulsing in a Mayday pattern"?
Source: Geostorm (2017)

 

[Raymott]

Did you lookup 'Mayday', 'pulsing' and 'pattern', kingston? I think you are continuing to under-extend yourself - for what my opinion is worth.