{
  "suite": "QP-ASTRO-010 Verification Test Vectors",
  "version": "1.0.0",
  "engine": "@quizzman/qm-astro@0.1.0",
  "generated_at": "2026-10-01T20:00:00.000Z",
  "total_vectors": 8,
  "vectors": [
    {
      "id": "VEC-DELTAT-2000",
      "description": "Secular Delta T at Gregorian Epoch 2000.0 (IERS finals2000A overlay)",
      "input": {
        "year": 2000.0
      },
      "expected": {
        "delta_t_seconds": 63.81,
        "tolerance_seconds": 0.1
      }
    },
    {
      "id": "VEC-DELTAT-2010",
      "description": "Secular Delta T at Gregorian Epoch 2010.0 (IERS finals2000A overlay)",
      "input": {
        "year": 2010.0
      },
      "expected": {
        "delta_t_seconds": 66.06,
        "tolerance_seconds": 0.1
      }
    },
    {
      "id": "VEC-DELTAT-2020",
      "description": "Secular Delta T at Gregorian Epoch 2020.0 (IERS finals2000A overlay)",
      "input": {
        "year": 2020.0
      },
      "expected": {
        "delta_t_seconds": 69.36,
        "tolerance_seconds": 0.1
      }
    },
    {
      "id": "VEC-DELTAT-2024",
      "description": "Secular Delta T at Gregorian Epoch 2024.0 (IERS finals2000A overlay)",
      "input": {
        "year": 2024.0
      },
      "expected": {
        "delta_t_seconds": 69.17,
        "tolerance_seconds": 0.15
      }
    },
    {
      "id": "VEC-DELTAT-HISTORIC-1600",
      "description": "Espenak-Meeus Polynomial Delta T at Historical Epoch 1600.0",
      "input": {
        "year": 1600.0
      },
      "expected": {
        "delta_t_seconds": 120.0,
        "tolerance_seconds": 0.5
      }
    },
    {
      "id": "VEC-SOLAR-TERM-VERNAL-2024",
      "description": "Apparent Ingress Epoch for 2024 Vernal Equinox (Xuan Phan, lambda = 0 deg)",
      "input": {
        "target_longitude_deg": 0.0,
        "year": 2024
      },
      "expected": {
        "ingress_datetime_utc": "2024-03-20T03:06:00Z",
        "tolerance_seconds": 60
      }
    },
    {
      "id": "VEC-SOLAR-TERM-SUMMER-2024",
      "description": "Apparent Ingress Epoch for 2024 Summer Solstice (Ha Chi, lambda = 90 deg)",
      "input": {
        "target_longitude_deg": 90.0,
        "year": 2024
      },
      "expected": {
        "ingress_datetime_utc": "2024-06-20T20:51:00Z",
        "tolerance_seconds": 60
      }
    },
    {
      "id": "VEC-MERCURY-STATION-2025",
      "description": "Mercury Retrograde Station Boundary Epoch (November 2025)",
      "input": {
        "body": "mercury",
        "search_window_start_utc": "2025-11-01T00:00:00Z",
        "search_window_end_utc": "2025-12-15T00:00:00Z"
      },
      "expected": {
        "station_type": "retrograde_start",
        "speed_lon_deg_per_day": 0.0,
        "tolerance_speed": 0.001
      }
    }
  ]
}