National Aeronautics and Space Administration

Glenn Research Center

Spline Radial Panel Concentrators

Spline Radial Panel (SRP) Concentrators are based on radio frequency (RF) antenna technology:

  • Two 13 m dishes planned for ASEAN Cellular Satellite (June 1999 launch)
  • Benefits include low mass, low volume, ease of deployment
Illustration depicting an SRP concentrator in both a deployed and a stowed state showing support cables, hub assembly, and bi-folding ribs

Illustration depicting an SRP concentrator in both a deployed and a stowed state showing support cables, hub assembly, and bi-folding ribs

The illustration above depicts an SRP concentrator in both a deployed and a stowed state showing support cables, hub assembly, and bi-folding ribs.

ACeS Satellite with two deployed concentrators

ACeS Satellite with two deployed concentrators

Key technology challenge is reflective spline development:

  • Fabrication Process
  • Space Environment Performance/Durability

Current development status:

  • Conceptual design complete (Harris)
  • Two vendors, three processes evaluated for spline manufacturing
    • Graphite Replication (COI)
    • Graphite Cocure (COI)
    • Hydroformed Al (Anderson/Alcoa)
  • Atomic oxygen durability tested

The images above depict a demonstration model of the deployment truss structure.