{
  "source": "https://media.springernature.com/original/springer-static/esm/art%3A10.1038%2Fs41586-026-10124-3/MediaObjects/41586_2026_10124_MOESM4_ESM.xlsx",
  "sheet": "d, from fit to exp.",
  "observations": [
    {
      "group": 1,
      "speed_m_s": 253.8844287750504,
      "frequency_hz": -26289.35616261326,
      "sigma_hz": 22955.95552675789
    },
    {
      "group": 2,
      "speed_m_s": 252.4641537275354,
      "frequency_hz": 15417.83608581172,
      "sigma_hz": 23006.65250653802
    },
    {
      "group": 3,
      "speed_m_s": 250.3969806699644,
      "frequency_hz": -393.6750366808847,
      "sigma_hz": 23543.30401755194
    },
    {
      "group": 4,
      "speed_m_s": 247.5480835672633,
      "frequency_hz": 22844.45843654429,
      "sigma_hz": 23709.95474050528
    },
    {
      "group": 5,
      "speed_m_s": 243.2434906148584,
      "frequency_hz": 16742.35246983008,
      "sigma_hz": 23722.63500336638
    },
    {
      "group": 6,
      "speed_m_s": 236.5720512996509,
      "frequency_hz": -17601.70195304672,
      "sigma_hz": 23354.33199525706
    },
    {
      "group": 7,
      "speed_m_s": 227.9866472505236,
      "frequency_hz": 21167.36063214974,
      "sigma_hz": 23788.70874228457
    },
    {
      "group": 8,
      "speed_m_s": 218.3775750538306,
      "frequency_hz": 21010.75171642215,
      "sigma_hz": 23970.93849253333
    },
    {
      "group": 9,
      "speed_m_s": 203.1418298610661,
      "frequency_hz": -5217.645846532425,
      "sigma_hz": 17310.87110382453
    },
    {
      "group": 10,
      "speed_m_s": 183.0387544673834,
      "frequency_hz": 17984.90326579614,
      "sigma_hz": 18585.19588011129
    },
    {
      "group": 11,
      "speed_m_s": 165.2031176499674,
      "frequency_hz": -11855.51845920621,
      "sigma_hz": 20811.83432581323
    },
    {
      "group": 12,
      "speed_m_s": 144.9305553410015,
      "frequency_hz": 11153.19425392337,
      "sigma_hz": 17789.80948716744
    },
    {
      "group": 13,
      "speed_m_s": 120.1953904391325,
      "frequency_hz": -11208.56085059815,
      "sigma_hz": 19758.9813670036
    },
    {
      "group": 14,
      "speed_m_s": 98.87792155979947,
      "frequency_hz": -6639.626761985477,
      "sigma_hz": 28681.08396206312
    },
    {
      "group": 15,
      "speed_m_s": 81.83269412386144,
      "frequency_hz": 7438.140044060769,
      "sigma_hz": 33899.91413103946
    },
    {
      "group": 16,
      "speed_m_s": 66.99633819998482,
      "frequency_hz": 13491.51388040325,
      "sigma_hz": 55156.04414784061
    }
  ],
  "published_extrapolation": {
    "sheet": "d, extrapolation",
    "intercept_hz": -3236.781334199796,
    "sigma_hz": 21730.62643492037
  },
  "notice": "Corrected fitted frequencies for one illustrated scan, not raw fluorescence counts. Frequencies use the source sheet offset convention. No exclusion within the selected velocity subset."
}