{
  "benchmark": "relay_constellation",
  "case_id": "case_0001",
  "constraints": {
    "max_added_satellites": 6,
    "max_altitude_m": 1500000.0,
    "max_eccentricity": 0.02,
    "max_inclination_deg": 85.0,
    "max_isl_range_m": 20000000.0,
    "max_links_per_endpoint": 1,
    "max_links_per_satellite": 3,
    "min_altitude_m": 500000.0,
    "min_inclination_deg": 20.0
  },
  "epoch": "2026-01-01T00:00:00Z",
  "horizon_end": "2026-01-05T00:00:00Z",
  "horizon_start": "2026-01-01T00:00:00Z",
  "propagation": {
    "earth_fixed_frame": "itrf",
    "frame": "gcrf",
    "model": "j2"
  },
  "routing_step_s": 60,
  "scoring": {
    "primary_metric": "service_fraction",
    "secondary_metric": "worst_demand_service_fraction"
  },
  "seed": 2027
}
