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FA-55991 / Astronomical coordinate conventions / Open access

Barycentric arrival corrections: Topocentric residual delay fails to subtract geocentric position already corrected · case 01

The adapter reports an incorrect topocentric residual while other fields remain valid.

Verified by executionVariant 1 · 6 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Topocentric residual delay fails to subtract geocentric position already corrected. Faulty expression: d['r']*d['n']/d['c']

THE FAILURE

Topocentric residual delay fails to subtract geocentric position already corrected. Faulty expression: d['r']*d['n']/d['c']

Unsuccessful approach: A partial convention repair still uses (d['r']+d['g'])*d['n']/d['c']

Case contract

A supplied timing adapter has observer position r projected onto source direction n, speed c>0, Einstein delay E, Shapiro delay S, and geocenter projection g. Barycentric arrival is t+r*n/c+E+S. This model composes explicit corrections only and does not calculate ephemerides or relativistic delays. Output fields are defined by: roemer_delay = d['r']*d['n']/d['c']; arrival = d['t']+d['r']*d['n']/d['c']+d['E']+d['S']; topocentric_residual = (d['r']-d['g'])*d['n']/d['c']; geocentric_arrival = d['t']+d['g']*d['n']/d['c']+d['E']+d['S']; observer_arrival = d['t']-d['r']*d['n']/d['c']-d['E']-d['S']; geometric_rate = d['n']/d['c']

Why this case matters

Catalog, detector, sky-coordinate, and spectroscopy adapters must preserve the association between numeric coordinates and their declared reference conventions.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    return {'roemer_delay': d['r']*d['n']/d['c'], 'arrival': d['t']+d['r']*d['n']/d['c']+d['E']+d['S'], 'topocentric_residual': d['r']*d['n']/d['c'], 'geocentric_arrival': d['t']+d['g']*d['n']/d['c']+d['E']+d['S'], 'observer_arrival': d['t']-d['r']*d['n']/d['c']-d['E']-d['S'], 'geometric_rate': d['n']/d['c']}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'t': 100, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 108.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 105.0, 'observer_arrival': 92.0, 'geometric_rate': 0.5}), ({'t': 100, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 104.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 104.0, 'observer_arrival': 96.0, 'geometric_rate': 0.0}), ({'t': 100, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 102.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 105.0, 'observer_arrival': 98.0, 'geometric_rate': 0.5}), ({'t': 100, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 104.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 101.0, 'observer_arrival': 96.0, 'geometric_rate': 0.5}), ({'t': 100, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 108.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 104.0, 'observer_arrival': 92.0, 'geometric_rate': 0.5}), ({'t': 100, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 99.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 100.5, 'observer_arrival': 101.0, 'geometric_rate': -0.25})], 2: [({'t': 101, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 109.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 106.0, 'observer_arrival': 93.0, 'geometric_rate': 0.5}), ({'t': 101, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 105.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 105.0, 'observer_arrival': 97.0, 'geometric_rate': 0.0}), ({'t': 101, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 103.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 106.0, 'observer_arrival': 99.0, 'geometric_rate': 0.5}), ({'t': 101, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 105.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 102.0, 'observer_arrival': 97.0, 'geometric_rate': 0.5}), ({'t': 101, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 109.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 105.0, 'observer_arrival': 93.0, 'geometric_rate': 0.5}), ({'t': 101, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 100.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 101.5, 'observer_arrival': 102.0, 'geometric_rate': -0.25})], 3: [({'t': 102, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 110.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 107.0, 'observer_arrival': 94.0, 'geometric_rate': 0.5}), ({'t': 102, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 106.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 106.0, 'observer_arrival': 98.0, 'geometric_rate': 0.0}), ({'t': 102, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 104.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 107.0, 'observer_arrival': 100.0, 'geometric_rate': 0.5}), ({'t': 102, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 106.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 103.0, 'observer_arrival': 98.0, 'geometric_rate': 0.5}), ({'t': 102, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 110.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 106.0, 'observer_arrival': 94.0, 'geometric_rate': 0.5}), ({'t': 102, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 101.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 102.5, 'observer_arrival': 103.0, 'geometric_rate': -0.25})], 4: [({'t': 103, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 111.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 108.0, 'observer_arrival': 95.0, 'geometric_rate': 0.5}), ({'t': 103, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 107.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 107.0, 'observer_arrival': 99.0, 'geometric_rate': 0.0}), ({'t': 103, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 105.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 108.0, 'observer_arrival': 101.0, 'geometric_rate': 0.5}), ({'t': 103, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 107.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 104.0, 'observer_arrival': 99.0, 'geometric_rate': 0.5}), ({'t': 103, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 111.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 107.0, 'observer_arrival': 95.0, 'geometric_rate': 0.5}), ({'t': 103, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 102.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 103.5, 'observer_arrival': 104.0, 'geometric_rate': -0.25})], 5: [({'t': 104, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 112.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 109.0, 'observer_arrival': 96.0, 'geometric_rate': 0.5}), ({'t': 104, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 108.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 108.0, 'observer_arrival': 100.0, 'geometric_rate': 0.0}), ({'t': 104, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 106.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 109.0, 'observer_arrival': 102.0, 'geometric_rate': 0.5}), ({'t': 104, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 108.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 105.0, 'observer_arrival': 100.0, 'geometric_rate': 0.5}), ({'t': 104, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 112.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 108.0, 'observer_arrival': 96.0, 'geometric_rate': 0.5}), ({'t': 104, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 103.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 104.5, 'observer_arrival': 105.0, 'geometric_rate': -0.25})]}
for i, (record, expected) in enumerate(fixtures[N]):
    check('astronomical fixture %s' % i, solve(record), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
astronomical fixture 0{'arrival': 108.0, 'geocentric_arrival': 105.0, 'geometric_rate': 0.5, 'observer_arrival': 92.0, 'roemer_delay': 4.0, 'topocentric_residual': 4.0}{'arrival': 108.0, 'geocentric_arrival': 105.0, 'geometric_rate': 0.5, 'observer_arrival': 92.0, 'roemer_delay': 4.0, 'topocentric_residual': 3.0}Failed
astronomical fixture 1{'arrival': 104.0, 'geocentric_arrival': 104.0, 'geometric_rate': 0.0, 'observer_arrival': 96.0, 'roemer_delay': 0.0, 'topocentric_residual': 0.0}{'arrival': 104.0, 'geocentric_arrival': 104.0, 'geometric_rate': 0.0, 'observer_arrival': 96.0, 'roemer_delay': 0.0, 'topocentric_residual': 0.0}Passed
astronomical fixture 2{'arrival': 102.0, 'geocentric_arrival': 105.0, 'geometric_rate': 0.5, 'observer_arrival': 98.0, 'roemer_delay': -2.0, 'topocentric_residual': -2.0}{'arrival': 102.0, 'geocentric_arrival': 105.0, 'geometric_rate': 0.5, 'observer_arrival': 98.0, 'roemer_delay': -2.0, 'topocentric_residual': -3.0}Failed
astronomical fixture 3{'arrival': 104.0, 'geocentric_arrival': 101.0, 'geometric_rate': 0.5, 'observer_arrival': 96.0, 'roemer_delay': 4.0, 'topocentric_residual': 4.0}{'arrival': 104.0, 'geocentric_arrival': 101.0, 'geometric_rate': 0.5, 'observer_arrival': 96.0, 'roemer_delay': 4.0, 'topocentric_residual': 3.0}Failed
astronomical fixture 4{'arrival': 108.0, 'geocentric_arrival': 104.0, 'geometric_rate': 0.5, 'observer_arrival': 92.0, 'roemer_delay': 4.0, 'topocentric_residual': 4.0}{'arrival': 108.0, 'geocentric_arrival': 104.0, 'geometric_rate': 0.5, 'observer_arrival': 92.0, 'roemer_delay': 4.0, 'topocentric_residual': 4.0}Passed
astronomical fixture 5{'arrival': 99.0, 'geocentric_arrival': 100.5, 'geometric_rate': -0.25, 'observer_arrival': 101.0, 'roemer_delay': -2.0, 'topocentric_residual': -2.0}{'arrival': 99.0, 'geocentric_arrival': 100.5, 'geometric_rate': -0.25, 'observer_arrival': 101.0, 'roemer_delay': -2.0, 'topocentric_residual': -1.5}Failed

SHA-256 / dad27cc0369b949dd2b1345357147d3c06040d6a2c6e5f7312e5fbff826e88a5

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    return {'roemer_delay': d['r']*d['n']/d['c'], 'arrival': d['t']+d['r']*d['n']/d['c']+d['E']+d['S'], 'topocentric_residual': (d['r']+d['g'])*d['n']/d['c'], 'geocentric_arrival': d['t']+d['g']*d['n']/d['c']+d['E']+d['S'], 'observer_arrival': d['t']-d['r']*d['n']/d['c']-d['E']-d['S'], 'geometric_rate': d['n']/d['c']}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'t': 100, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 108.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 105.0, 'observer_arrival': 92.0, 'geometric_rate': 0.5}), ({'t': 100, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 104.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 104.0, 'observer_arrival': 96.0, 'geometric_rate': 0.0}), ({'t': 100, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 102.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 105.0, 'observer_arrival': 98.0, 'geometric_rate': 0.5}), ({'t': 100, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 104.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 101.0, 'observer_arrival': 96.0, 'geometric_rate': 0.5}), ({'t': 100, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 108.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 104.0, 'observer_arrival': 92.0, 'geometric_rate': 0.5}), ({'t': 100, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 99.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 100.5, 'observer_arrival': 101.0, 'geometric_rate': -0.25})], 2: [({'t': 101, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 109.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 106.0, 'observer_arrival': 93.0, 'geometric_rate': 0.5}), ({'t': 101, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 105.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 105.0, 'observer_arrival': 97.0, 'geometric_rate': 0.0}), ({'t': 101, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 103.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 106.0, 'observer_arrival': 99.0, 'geometric_rate': 0.5}), ({'t': 101, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 105.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 102.0, 'observer_arrival': 97.0, 'geometric_rate': 0.5}), ({'t': 101, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 109.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 105.0, 'observer_arrival': 93.0, 'geometric_rate': 0.5}), ({'t': 101, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 100.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 101.5, 'observer_arrival': 102.0, 'geometric_rate': -0.25})], 3: [({'t': 102, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 110.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 107.0, 'observer_arrival': 94.0, 'geometric_rate': 0.5}), ({'t': 102, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 106.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 106.0, 'observer_arrival': 98.0, 'geometric_rate': 0.0}), ({'t': 102, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 104.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 107.0, 'observer_arrival': 100.0, 'geometric_rate': 0.5}), ({'t': 102, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 106.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 103.0, 'observer_arrival': 98.0, 'geometric_rate': 0.5}), ({'t': 102, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 110.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 106.0, 'observer_arrival': 94.0, 'geometric_rate': 0.5}), ({'t': 102, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 101.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 102.5, 'observer_arrival': 103.0, 'geometric_rate': -0.25})], 4: [({'t': 103, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 111.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 108.0, 'observer_arrival': 95.0, 'geometric_rate': 0.5}), ({'t': 103, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 107.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 107.0, 'observer_arrival': 99.0, 'geometric_rate': 0.0}), ({'t': 103, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 105.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 108.0, 'observer_arrival': 101.0, 'geometric_rate': 0.5}), ({'t': 103, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 107.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 104.0, 'observer_arrival': 99.0, 'geometric_rate': 0.5}), ({'t': 103, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 111.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 107.0, 'observer_arrival': 95.0, 'geometric_rate': 0.5}), ({'t': 103, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 102.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 103.5, 'observer_arrival': 104.0, 'geometric_rate': -0.25})], 5: [({'t': 104, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 112.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 109.0, 'observer_arrival': 96.0, 'geometric_rate': 0.5}), ({'t': 104, 'r': 8, 'n': 0, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': 0.0, 'arrival': 108.0, 'topocentric_residual': 0.0, 'geocentric_arrival': 108.0, 'observer_arrival': 100.0, 'geometric_rate': 0.0}), ({'t': 104, 'r': -4, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 106.0, 'topocentric_residual': -3.0, 'geocentric_arrival': 109.0, 'observer_arrival': 102.0, 'geometric_rate': 0.5}), ({'t': 104, 'r': 8, 'n': 2, 'c': 4, 'E': 0, 'S': 0, 'g': 2}, {'roemer_delay': 4.0, 'arrival': 108.0, 'topocentric_residual': 3.0, 'geocentric_arrival': 105.0, 'observer_arrival': 100.0, 'geometric_rate': 0.5}), ({'t': 104, 'r': 8, 'n': 2, 'c': 4, 'E': 3, 'S': 1, 'g': 0}, {'roemer_delay': 4.0, 'arrival': 112.0, 'topocentric_residual': 4.0, 'geocentric_arrival': 108.0, 'observer_arrival': 96.0, 'geometric_rate': 0.5}), ({'t': 104, 'r': 8, 'n': -1, 'c': 4, 'E': 3, 'S': -2, 'g': 2}, {'roemer_delay': -2.0, 'arrival': 103.0, 'topocentric_residual': -1.5, 'geocentric_arrival': 104.5, 'observer_arrival': 105.0, 'geometric_rate': -0.25})]}
for i, (record, expected) in enumerate(fixtures[N]):
    check('astronomical fixture %s' % i, solve(record), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
astronomical fixture 0{'arrival': 108.0, 'geocentric_arrival': 105.0, 'geometric_rate': 0.5, 'observer_arrival': 92.0, 'roemer_delay': 4.0, 'topocentric_residual': 5.0}{'arrival': 108.0, 'geocentric_arrival': 105.0, 'geometric_rate': 0.5, 'observer_arrival': 92.0, 'roemer_delay': 4.0, 'topocentric_residual': 3.0}Failed
astronomical fixture 1{'arrival': 104.0, 'geocentric_arrival': 104.0, 'geometric_rate': 0.0, 'observer_arrival': 96.0, 'roemer_delay': 0.0, 'topocentric_residual': 0.0}{'arrival': 104.0, 'geocentric_arrival': 104.0, 'geometric_rate': 0.0, 'observer_arrival': 96.0, 'roemer_delay': 0.0, 'topocentric_residual': 0.0}Passed
astronomical fixture 2{'arrival': 102.0, 'geocentric_arrival': 105.0, 'geometric_rate': 0.5, 'observer_arrival': 98.0, 'roemer_delay': -2.0, 'topocentric_residual': -1.0}{'arrival': 102.0, 'geocentric_arrival': 105.0, 'geometric_rate': 0.5, 'observer_arrival': 98.0, 'roemer_delay': -2.0, 'topocentric_residual': -3.0}Failed
astronomical fixture 3{'arrival': 104.0, 'geocentric_arrival': 101.0, 'geometric_rate': 0.5, 'observer_arrival': 96.0, 'roemer_delay': 4.0, 'topocentric_residual': 5.0}{'arrival': 104.0, 'geocentric_arrival': 101.0, 'geometric_rate': 0.5, 'observer_arrival': 96.0, 'roemer_delay': 4.0, 'topocentric_residual': 3.0}Failed
astronomical fixture 4{'arrival': 108.0, 'geocentric_arrival': 104.0, 'geometric_rate': 0.5, 'observer_arrival': 92.0, 'roemer_delay': 4.0, 'topocentric_residual': 4.0}{'arrival': 108.0, 'geocentric_arrival': 104.0, 'geometric_rate': 0.5, 'observer_arrival': 92.0, 'roemer_delay': 4.0, 'topocentric_residual': 4.0}Passed
astronomical fixture 5{'arrival': 99.0, 'geocentric_arrival': 100.5, 'geometric_rate': -0.25, 'observer_arrival': 101.0, 'roemer_delay': -2.0, 'topocentric_residual': -2.5}{'arrival': 99.0, 'geocentric_arrival': 100.5, 'geometric_rate': -0.25, 'observer_arrival': 101.0, 'roemer_delay': -2.0, 'topocentric_residual': -1.5}Failed

SHA-256 / 097eaabf2913b4a5eb8e39fa2de2b8d6a79844fc1d1a917a407136b7026d9029

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 6 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

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Verification & scope

Explicitly stipulated finite algebraic adapter; no standards conformance, physical accuracy, or production-library claim. Inputs are the documented finite valid model domain. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:46:03.074236+00:00.

Case digest / 0e310c6494e6406555b100ef11e53d88f79fc240674bc0dfe74c7bb803a1169c