Short wave IR (SWIR) observations of He 1083 nm and H 1281.9 nightglow emissions

SWIR observations of He and H nightglow emissions have been carried out at the Jenny Jump State Park airglow observatory since early November, 2024. Results show absence of a morning twilight response for H and increased brightness of the morning twilight response for He. Geomagnetic activity do change the nighttime behavior of H and He. These results do show the expected reduction of He twilight emission intensity in the spring due to the transition of the He winter polar bulge from the northern hemisphere to the southern winter polar region.