{
  "annotation_id": "f804831f-baf8-440d-a0b9-938e2cea4a78",
  "date_created": "2026-03-02T18:01:17.308000Z",
  "date_modified": "2026-03-02T18:01:17.308000Z",
  "file_hash": "92a1e765084694ec748c506041ff73e046da0d05a2e32f44fbd7fea805e27255",
  "private": false,
  "record": {
    "abstract": "Several VLBI EOP series were investigated with goal of determination of\nparameters of the Free Core Nutation (FCN). Both the amplitude and period of\nthe FCN were studied using spectral and wavelet analysis. Our analysis reveals\na variability of both the amplitude (known also from other investigations) and\nthe period (or phase) of the FCN nutation. The FCN amplitude varies in the\nrange about 0.1--0.3 mas, and the FCN period -- in the range about 415--490\nsolar days. The latter may be also explained by changes in the FCN phase.\nComparison of time variations of the FCN period and amplitude obtained by\ndifferent authors and methods shows substantial discrepancies at the edges of\nthe period of observations.",
    "arxiv_id": "physics/0702152",
    "authors": [
      "Z. Malkin",
      "D. Terentev"
    ],
    "categories": [
      "physics.geo-ph"
    ],
    "journal_ref": "Communications of the Institute of Applied Astronomy RAS, 2003,\n  No. 149",
    "title": "Parameters of the Free Core Nutation from VLBI Data",
    "url": "https://arxiv.org/abs/physics/0702152"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2afc9162-be85-4121-a6f6-0df80b09c558",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}