Bangor, Maine Boresight Ground Control Points

The US Geological Survey's Upper Midwest Environmental Sciences Center, in coordination with the US Fish and Wildlife Service's (USFWS) Branch of Migratory Bird...美国地质调查局（US Geological Survey）下属的上中西部环境科学中心，与美国鱼类及野生动物管理局（US Fish and Wildlife Service, USFWS）的候鸟分部协同合作……