{
  "id": 559980,
  "title": "The equation between the relative permittivity and electrical conductivity",
  "url": "/competitions/gpr-max-deep-learning-challenge-1-gdlc-1/discussion/559980",
  "author_name": "",
  "post_date": "2025-01-28T22:22:05.520278400Z",
  "votes": null,
  "comment_count": 2,
  "views": 0,
  "content": "<p>The equation between the relative permittivity εr and electrical conductivity σ of the material assumed in the model differs by a factor of 10 between [Overview] and [Note] on the website. </p>\n<p>[Overview] <br>\nThe subsurface will consist of low permittivity and conductivity materials, the permittivity will vary ε &lt; 10, consistent with the returned samples from the Apollo missions. To simplify the problem, we assume a correlation between the relative permittivity and conductivity <strong>σ = ε/1000</strong>, following the rationale that the abnormally high permittivity value of titanium oxides and their dispersive properties will increase both the overall permittivity and electromagnetic losses of a Lunar formation. </p>\n<p>[Note] gprmax_simulations_GDLC <br>\n<strong>sig = er/10000</strong></p>",
  "messages": [
    {
      "id": "3109474",
      "postDate": "01/28/2025 22:22:05",
      "content": "<p>The equation between the relative permittivity εr and electrical conductivity σ of the material assumed in the model differs by a factor of 10 between [Overview] and [Note] on the website. </p>\n<p>[Overview] <br>\nThe subsurface will consist of low permittivity and conductivity materials, the permittivity will vary ε &lt; 10, consistent with the returned samples from the Apollo missions. To simplify the problem, we assume a correlation between the relative permittivity and conductivity <strong>σ = ε/1000</strong>, following the rationale that the abnormally high permittivity value of titanium oxides and their dispersive properties will increase both the overall permittivity and electromagnetic losses of a Lunar formation. </p>\n<p>[Note] gprmax_simulations_GDLC <br>\n<strong>sig = er/10000</strong></p>",
      "rawMarkdown": "The equation between the relative permittivity εr and electrical conductivity σ of the material assumed in the model differs by a factor of 10 between [Overview] and [Note] on the website. \n\n[Overview] \nThe subsurface will consist of low permittivity and conductivity materials, the permittivity will vary ε < 10, consistent with the returned samples from the Apollo missions. To simplify the problem, we assume a correlation between the relative permittivity and conductivity **σ = ε/1000**, following the rationale that the abnormally high permittivity value of titanium oxides and their dispersive properties will increase both the overall permittivity and electromagnetic losses of a Lunar formation. \n\n[Note] gprmax_simulations_GDLC \n**sig = er/10000**",
      "votes": null
    },
    {
      "id": "3110145",
      "postDate": "01/29/2025 17:43:45",
      "content": "<p>Thanks for pointing this out. There is a typo in the Overview, it should be er/10000 i.e. very low conductivity media. </p>",
      "rawMarkdown": "Thanks for pointing this out. There is a typo in the Overview, it should be er/10000 i.e. very low conductivity media.",
      "votes": null
    },
    {
      "id": "3110146",
      "postDate": "01/29/2025 17:44:11",
      "content": "<p>I have revised the overview, so now it is the correct equation sigma = er/10000</p>",
      "rawMarkdown": "I have revised the overview, so now it is the correct equation sigma = er/10000",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 3110145,
      "author_name": "iragia",
      "author_url": "",
      "post_date": "01/29/2025 17:43:45",
      "content": "<p>Thanks for pointing this out. There is a typo in the Overview, it should be er/10000 i.e. very low conductivity media. </p>",
      "votes": null,
      "replies": [
        {
          "id": 3110146,
          "author_name": "iragia",
          "author_url": "",
          "post_date": "01/29/2025 17:44:11",
          "content": "<p>I have revised the overview, so now it is the correct equation sigma = er/10000</p>",
          "votes": null,
          "replies": []
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "3109474": "The equation between the relative permittivity εr and electrical conductivity σ of the material assumed in the model differs by a factor of 10 between [Overview] and [Note] on the website. \n\n[Overview] \nThe subsurface will consist of low permittivity and conductivity materials, the permittivity will vary ε < 10, consistent with the returned samples from the Apollo missions. To simplify the problem, we assume a correlation between the relative permittivity and conductivity **σ = ε/1000**, following the rationale that the abnormally high permittivity value of titanium oxides and their dispersive properties will increase both the overall permittivity and electromagnetic losses of a Lunar formation. \n\n[Note] gprmax_simulations_GDLC \n**sig = er/10000**",
    "3110145": "Thanks for pointing this out. There is a typo in the Overview, it should be er/10000 i.e. very low conductivity media.",
    "3110146": "I have revised the overview, so now it is the correct equation sigma = er/10000"
  },
  "source": "meta"
}