surveillance beam (military)


Spain-European Spanish
Hi all!
I would be thankful for your expertise on this expression:

"In addition, the project has developed two new surveillance BEAMS for maritime surveillance, which will be uploaded to the satellite in the near future".

My guess:
Ademas, el proyecto ha desarrollado dos nuevos campos ?(de luz?, electromagneticos?) para la vigilancia maritima, que se añadirán al software del satélite próximamente.
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