{
  "abstract": "We develop a Mars-centered post-Newtonian framework for relating barycentric coordinate time, Mars-centered coordinate time, a conventional Mars surface time scale, and the proper times of landed and orbiting clocks. The construction follows the International Astronomical Union BCRS/TCB formalism, introduces Areocentric Coordinate Time (TCA), and writes each clock transformation as a secular rate plus zero-mean periodic terms. Terms are retained when their fractional-frequency amplitude exceeds 5e-18 or their one-way accumulated timing amplitude exceeds 0.1 ps. The numerical realization uses the GMM-3 Mars gravity field through degree and order 120, point-mass tides from the Sun, Phobos, and Deimos with origin and dipole terms removed, and bounds on omitted local c^-4 and external-perturber terms. Representative low-Mars-orbit, areostationary, Phobos-/Deimos-distance, and highly elliptical relay regimes are evaluated. Relative to the adopted Mars surface scale, a 300 km near-polar clock is slower by 4.56 microseconds per day, while areostationary and Deimos-distance clocks are faster by 9.13 and 9.52 microseconds per day. The leading Mars-J2 timing line is about 87 ps at 300 km altitude and remains several ps near areostationary radius for inclined or librating areosynchronous cases; perihelion-scaled solar tides become retained sub-ps terms in high relay orbits. The result is a reference-system and model-retention framework, not a final operational Mars Time Ephemeris. A realized sub-ps system still requires a selected planetary ephemeris, Mars orientation and seasonal-gravity model, spacecraft orbit determination, calibrated link delays, and covariance analysis. Time-variable low-degree gravity from seasonal CO2 exchange is a leading surface-realization term and must be modeled, monitored, or empirically bounded before sub-ps Mars surface-scale claims are made.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: ApJ 1011: 128 (2026)",
  "arxiv": "2606.13726",
  "author_total": 1,
  "authors": [
    {
      "name": "Slava G. Turyshev"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/csy2yqhq4j06r.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.13726",
  "fulltext_url": null,
  "id": "csy2yqhq4j06r",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.13726",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.EP"
    ],
    [
      "arxiv",
      "astro-ph.IM"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3107|Advanced Frequency and Time Standards"
    ]
  ],
  "openalex": "W7164842893",
  "pdf_url": "https://arxiv.org/pdf/2606.13726",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/csy2yqhq4j06r.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:22Z",
      "native_id": "2606.13726",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.13726"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "High-Precision Relativistic Time Scales for Mars Surface and Orbital Clocks",
  "title_text": "High-Precision Relativistic Time Scales for Mars Surface and Orbital Clocks",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/csy2yqhq4j06r",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.3847/1538-4357/aeaae3",
      "pid": "bc3nj48rk3wdq",
      "relation": "published-as",
      "title": "High-precision Relativistic Timescales for Mars Surface and Orbital Clocks",
      "venue": "The Astrophysical Journal"
    }
  ]
}