Does a list of ESPA satellites exist?It searches poorly on Gunter's site as Arianespace contains "espa".
ESPAStar-D-5, D-6, D-7, D-8, D-9, D-11, D-12, D-13 and D-14 are "In Production or Delivered"
CONTRACT BACKLOG FOR ESPAStar-D, MISSIONS = 10CONTRACT BACKLOG FOR ESPAStar -HP, MISSIONS = 1
Rings can be loaded with excess fuel, refuellable spacecraft, spacecraft tankers which can bring fuel to other satellites, proliferated sensors including space-based environmental monitoring, and other R&D, prototype, or operational systems. SSC has invested in the TETRA line of spacecraft prototypes to increase the industry base for small-to-medium size spacecraft which can launch on a reconfigurable ring. AFRL and SSC are partnered on TETRA-5 set to launch on ROOSTER 4 in 2026 to demonstrate refuellable versions of these moderate size spacecraft.
Next, Northrop Grumman will “take those findings and translate them into our prototype, which we anticipate launching in 2025 to actually show the capability of beaming RF energy down to the planet,” said Jay Patel, vice president of Northrop Grumman Remote Sensing Programs.
Northrop Grumman has successfully completed the assembly and testing of its Protected Tactical Satcom Rapid Prototype (PTS-P) payload. The payload has now been delivered to the company’s facility in Gilbert, Arizona, where it will be integrated with an ESPAStar-HP bus and next-generation digital processing subsystem.