SSM-JTK – Data & Calibration — Outputs and manifest (2.9)

What ships and how to read it (single source of truth)

Back-test summary (per model)
Report a compact row capturing metrics, selection, and provenance:

  • MAE_deg, P90_deg, MAX_deg, misclass_rate
  • rasi_cross_MAE_days, cusp_dist_MAE_deg, station_date_MAE_days
  • selected_model, BIC_selected, train_loss
  • train_sample_mode, train_range, test_range
    Notes. Degrees for angle metrics; days for timing metrics. Use NaN if a metric is undefined (e.g., no matched crossings).

Back-test time-series (TEST slice)
Daily records for audit and visualization:
date, L_actual_deg, L_model_deg, deg_error, rasi_actual, rasi_model
deg_error = | wrap180( L_model_deg - L_actual_deg ) | and rasi(x) = floor( wrap360(x) / 30 ).

Manifest (portable kernel; runtime only needs this)
A minimal, planet-specific JSON-style object that the evaluator consumes:

{
  "planet": "...",
  "family": "fixed-n|free-n",
  "t0": "YYYY-MM-DD",
  "P_sid": <days or null>,
  "n_deg_per_day": <float>,
  "omegas": { "w1": <float>, "w2": <float>, "wS": <float>, "nE": <float> },
  "beta": {
    "a0_deg": <float>,
    "b1_deg_per_day": <float>,     // present for free-n; equals n_deg_per_day
    "c": [ ... ],                  // sin coefficients aligned to active omegas
    "d": [ ... ]                   // cos coefficients aligned to active omegas
  },
  "notes": "midpoint anchor; BIC-loss gate; one-wrap display"
}
  • Family mapping.
    • fixed-n: store P_sid; set n_deg_per_day = 360.0 / P_sid at runtime.
    • free-n: store learned n_deg_per_day (slope) directly.
  • Coefficients. Arrays c and d align positionally with keys listed in omegas.
  • Conventions. Angles in degrees; final display uses exactly one wrap: wrap360(y). Daily timestamp and t0 follow §2.2–§2.5.

Reproducibility

  • Every printed angle from evaluation is determined by manifest + one-line formula (no runtime ephemeris).
  • Always record train_range, test_range, t0, and the chosen design set so others can repeat your results.

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