Non-standard phenocam images go back to 2015 using non-NetCam cameras and can be used after processing to extend the record back an additional 4 years. See https://phenocam.nau.edu/webcam/sites/srm0/ as well as DOI: 10.1002/ecs2.4762
USDA-ARS and AmeriFlux core site funding from DOE This research was a contribution from the Long-Term Agroecosystem Research (LTAR) network. LTAR is supported by the United States Department of Agriculture.