{
  "annotation_id": "2a5f8354-5b26-4373-bbfa-14da1f0eac78",
  "date_created": "2026-03-02T18:00:32.333000Z",
  "date_modified": "2026-03-02T18:00:32.333000Z",
  "file_hash": "df118f9ea88717d92eb3bcee724012f77fb9b2c4a87163e71957441a28164ab0",
  "private": false,
  "record": {
    "abstract": "We present the results derived from measuring fundamental parameters of the\nionospheric response to the August 11, 1999 total solar eclipse. Our study is\nbased on using the data from about 70 GPS stations located in the neighbourhood\nof the eclipse totality phase in Europe. The eclipse period was characterized\nby a low level of geomagnetic disturbance (Dst - variation from -10 to -20 nT),\nwhich alleviated significantly the problem of detecting the ionospheric\nresponse to the eclipse. Our analysis revealed a well-defined effect of a\ndecrease (depression) of the total electron content (TEC) for all GPS stations.\nThe delay between minimum TEC values with respect to the totality phase near\nthe eclipse path increased gradually from 4 min in Greenwich longitude (10:40\nUT, LT) to 8 min at the longitude 16 degrees (12:09 LT). The depth and duration\nof the TEC depression were found to be 0.2-0.3 TECU and 60 min, respectively.\nThe results obtained in this study are in good agreement with earlier\nmeasurements and theoretical estimates.",
    "arxiv_id": "physics/0007024",
    "authors": [
      "E. L. Afraimovich",
      "E. A. Kosogorov",
      "O. S. Lesyuta"
    ],
    "categories": [
      "physics.geo-ph"
    ],
    "title": "Effects of the August 11, 1999 total solar eclipse as deduced from total   electron content measurements at the GPS network",
    "url": "https://arxiv.org/abs/physics/0007024"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "254429a7-8752-4886-a3aa-1302aade2e27",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}