apollo. (2026). Arecibo 1420 MHz drift scans, February–May 2020 (Arecibo REDS, project A3123) (Version 1.0) [Data set]. Mysteries Department. https://mysteriesdept.com/datasets/DAT0CXZ50C40KBH/arecibo-1420-mhz-drift-scans-februarymay-2020-arecibo-reds