{
  "receipt": "obs-receipt/1.1",
  "id": "ioda-yy-household-est-20261004",
  "issued_at": "2026-10-04T12:00:00Z",
  "kind": "derived",
  "layer": "household-access",
  "claims_about": "population",
  "source": {
    "name": "prefix reachability feed",
    "retrieved_at": "2026-10-04T11:50:00Z",
    "hand": "second"
  },
  "window": { "start": "2026-10-04T06:00:00Z", "end": "2026-10-04T11:50:00Z" },
  "geography": { "scope": "country", "code": "YY" },
  "measure": { "metric": "estimated-households-unreachable", "numerator": 90000, "denominator": 500000, "unit": "users" },
  "valid_until": "2026-10-06T00:00:00Z",
  "coupling": {
    "model": "Reachable prefixes assumed proportional to household reachability; no error margin stated.",
    "from_layer": "transport-prefix",
    "to_layer": "household-access",
    "valid_until": "2026-10-06T00:00:00Z",
    "divergence_log": "https://example.org/divergence/yy"
  }
}