{
  "annotation_id": "5a94bad2-3bbf-470d-93ad-a72b3224be99",
  "date_created": "2026-03-02T18:00:53.851000Z",
  "date_modified": "2026-03-02T18:00:53.851000Z",
  "file_hash": "95f9f738eca534e82055065bb43206da3c030afe587fd5ac9ce504207728d006",
  "private": false,
  "record": {
    "abstract": "An accuracy of the last version of International Reference Ionosphere\nIRI-2001 at low latitudes is tested by a detailed comparison of longitudinal\nvariations in the equatorial anomaly development following from this model with\nthe ones given by independent ISS-b satellite data. The critical frequency of\nF2-layer was calculated by either CCIR or URSI submodel, both of which are\nincorporated into IRI-2001. The main conclusion of our analysis is that the\nlongitudinal variations given by CCIR are substantially oversmoothed in\ncomparison with the ISS-b satellite data, and the variations given by URSI are\nfurther smoothed with respect to the CCIR ones. Therefore, further improvements\nof model description of the low-latitude F2-layer are desirable.",
    "arxiv_id": "physics/0411124",
    "authors": [
      "Yurii V. Dumin"
    ],
    "categories": [
      "physics.space-ph",
      "physics.geo-ph"
    ],
    "journal_ref": "Adv. Space Res., v.39, no.5, pp.687-690 (2007)",
    "title": "The Accuracy of IRI in the Description of Development of the Equatorial   (Appleton) Anomaly",
    "url": "https://arxiv.org/abs/physics/0411124"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "34816f91-c395-4a81-a06c-ff6a09d702a4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}