Air Force Magazine:

The Space Force’s sixth and final satellite in the Space-Based Infrared System heads to geosynchronous orbit as soon as Aug. 4, the faraway orbit offering a wide view of Earth to detect missile launches in the atmosphere.

The sixth satellite in the constellation adds “crucial fortification of the current missile warning system” that is “global, persistent, and taskable,” said officials who briefed reporters about the mission by phone Aug. 1.

The infrared sensors onboard SBIRS GEO-6 are identical to those on the other five SBIRS satellites, the first of which launched in 2011. But the new entry adds to the constellation’s accuracy in detecting missile launches anyway because of the satellites’ overlapping fields of view, said Col. Brian Denaro, program executive officer for Space Systems Command’s Space Sensing Directorate at Los Angeles Air Force Base, Calif.

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