GALLERY The Simons Observatory site as seen from the POLOCALC camera 2024: POLOCALC and the Simons Observatory Large Aperture Telescope Drone calibrator prototype, Chile Drone calibrator prototype for POLOCALC, flying at 5200 m, Chile Drone prototype for POLOCALC and CLASS telescope, Chile Blast-TNG in Antartica Blast-TNG Blast-TNG Simons Observatory ACT Blast-TNG Blast-TNG Archeops Blast-TNG Blast-TNG 2018 - Blast-TNG Archeops Blast-TNG ACT Test Flight Blast-TNG ACT ACT Archeops ACT Archeops Archeops ACT Archeops Archeops ACT ACT Archeops ACT OLIMPO Balloon Experiment Archeops OLIMPO Balloon Experiment Archeops OLIMPO Balloon Experiment OLIMPO Balloon Experiment Test Balloon Flight From Svalbard Test Balloon Flight From Svalbard Public Outreach Archeops Blast-TNG Blast-TNG Blast-TNG