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The 15th Space Surveillance Squadron operates the Maui Space Surveillance Complex, a strategically-located national asset at the 10,023 foot-summit of Haleakala on the island of Maui, Hawaii. The MSSC is host to small, medium, and large-aperture tracking optics, including the DoD's largest optical telescope designed for tracking and imaging satellites, with visible and infrared sensors to collect data on near-Earth and deep-space objects. The Ground-Based Electro-Optical Deep Space Surveillance Systems, located at Maui, Socorro, and Diego Garcia, are also under the 15 SPSS. The GEODSS Systems play a vital role in tracking deep space objects.
The 15 SPSS is unique as it fuses Space Domain Awareness Operations and SDA Research and Development. 15 SPSS is a component of Space Delta 2 and also operates experimental systems under the Air Force Research Laboratory.