{
  "id": "arrival-time.until-wall",
  "term": "arrival time",
  "sense": "until-wall",
  "pos": "noun",
  "status": "review",
  "level": 12,
  "domain": "agency",
  "style": "window",
  "definition": "The time until drift moves a parameter to a wall of its window, at the current rate.",
  "folk_gloss": null,
  "emergence": {
    "components": [
      "drift.aimless",
      "parameter.condition",
      "wall.range-end",
      "window.range",
      "rate.speed",
      "current.present",
      "time.dimension",
      "motion.movement"
    ],
    "interaction": "Distance to a wall divided by the rate of drift toward it gives a time, and that time, not the distance, is what decides whether any correction can still land. A near wall approached slowly can leave more time than a far wall approached fast.",
    "novel_properties": [
      "distance converted into time",
      "the quantity a correction must beat",
      "a wall that is approaching rather than standing"
    ]
  },
  "examples": [
    {
      "text": "Before a hurricane's landfall the US National Hurricane Center publishes the earliest reasonable arrival time of tropical-storm-force winds, telling each stretch of coast how long it has left to prepare.",
      "domain": "meteorology"
    }
  ],
  "relations": [
    {
      "id": "pressure.ontological",
      "type": "enables",
      "note": "pressure is what a short arrival time feels like from inside"
    },
    {
      "id": "lag.temporal",
      "type": "contrasts-with",
      "note": "lag is feedback arriving late; arrival time is how long the wall gives before it arrives"
    },
    {
      "id": "margin.spatial",
      "type": "contrasts-with",
      "note": "margin is the distance to the wall; arrival time is that distance over the rate of drift"
    }
  ],
  "used_by": [],
  "forms": [
    "arrival time",
    "arrival times",
    "time of arrival",
    "time to arrival"
  ],
  "closed": true,
  "provenance": {
    "author": "claude-opus-5-5:hand-curated",
    "date": "2026-10-01",
    "confidence": 0.85,
    "sources": [
      "schema/power-agency-phase.md"
    ]
  },
  "canonical": "https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-arrival-time.until-wall"
}