Technician Juan Carlos Gatica checks electronics on the ALMA correlator

Technician Juan Carlos Gatica checks electronics on the ALMA correlator. For this task, he's using supplemental oxygen at the high-altitude site. ALMA was recently approved for significant upgrades to the correlator, or brain, of the telescope. Additional upgrades were approved for the Digital Transmission System (DTS), the array’s information highway.
Credit: Carlos Padilla, NRAO/AUI/NSF