The Center for Solar-Terrestrial Research (CSTR) is an international leader in ground- and space-based solar and terrestrial physics, with an interest in understanding the effects of the Sun on the geospace environment.
Th e Center for Solar-Terrestrial Research (CSTR) operates the Expanded Owens Valley Solar Array in California, which is nearing completion of its major expansion to become one of the most capable solar-dedicated radio arrays in the world.
The Center for Solar-Terrestrial Research (CSTR) operates the Big Bear Solar Observatory in California, which houses the highest resolution solar optical telescope in the world at 1.6 meters