{
 "schema": "ausmt-station",
 "version": "0.1",
 "ausmt_id": "au.samas-1995.WAT",
 "station": "WAT",
 "survey": "SAMAS 1995",
 "survey_id": "samas-1995",
 "country": "Australia",
 "organisation": "Flinders University",
 "location": {
  "lat": -36.771,
  "lon": 140.893
 },
 "data": {
  "type": "GDS",
  "n_periods": 17,
  "period_min_s": 388.802488,
  "period_max_s": 27306.736572
 },
 "diagnostics": {
  "median_relative_error": null,
  "remote_reference": false,
  "tipper_available": true,
  "completeness_smoothness_diagnostic": {
   "value": null,
   "basis": "s",
   "note": "not a quality or geological-value judgement"
  },
  "method": "phase-tensor (Caldwell 2004)",
  "note": "screening diagnostic, not an interpretation product"
 },
 "processing": {
  "software": null,
  "algorithm": null,
  "remote_reference": false,
  "remote_site": null,
  "file_written_by": {
   "name": null,
   "version": null
  },
  "note": "Tipper transfer functions converted from the compilation register\nGDS/registry/AllStationData.lst, joined to GDS/registry/AllStationName.lst.\nThe register is Liejun Wang's Australian Electromagnetic Database as\nsupplied to the NCI compilation; this station has no EDI in any holding.\n\nCONVENTION: the register stores induction arrows in sign-reversed polar\nParkinson form, R_ANGLE = atan2(-Ty,-Tx) measured clockwise from north and\nR_RADIUS = hypot(Tx,Ty), so\nTXR = -R_RADIUS.cos(R_ANGLE)    TYR = -R_RADIUS.sin(R_ANGLE)\nTXI = -Q_RADIUS.cos(Q_ANGLE)    TYI = -Q_RADIUS.sin(Q_ANGLE).\n\nCOORDINATES are the register's PRINTED values.  The September 2002\nconversion read integer-printed register coordinates under an\nimplied-decimal format and corrupted six NCI files that way (-32 became\n-0.32); reading the register directly avoids it, and every coordinate\nwritten here has been checked to fall inside continental Australia.\n\nNO ACQDATE is written.  The September 2002 conversion stamped the date\n01/01/1994 and the acquirer 'Flinders University' on all 368 NCI files\nregardless of array; both are boilerplate and never a provenance signal.\n\nVARIANCES: the register prints NO uncertainty columns for this station's\nrows, so TXVAR.EXP and TYVAR.EXP are OMITTED rather than fabricated.\n\nAttribution: Whellams, J. M. (1996) PhD thesis, The Flinders University of\nSouth Australia; SAMAS is the author's own acronym for the base-station\narray.  The register carries the full seventeen-period grid, richer than the\nfour periods printed in the thesis, so the register is the preferred source\nfor this station; the thesis's four periods are used only as a cross-check.\n\nIDENTITY: register STATION_ID 491, FULL_NAME WAT, SHO WAT, REFERENCE_CODE\n12, register E_LONG 140.893, S_LAT -36.771, MAG_DEC 9.526. Identity is the\nSTATION_ID plus the coordinate, never the three-letter SHO code: SHO codes\ncollide across the compilation (five KOOs, three MORs and MUNs, two NORs,\nGREs, WARs and DARs). Dates in this file are ISO 8601."
 },
 "distribution": {
  "edi_available": true,
  "license": "CC-BY-4.0",
  "edi_path": "edi/samas-1995/WAT.edi"
 },
 "provenance": {
  "pipeline": "ausmt/extract.build_portal",
  "pipeline_version": "0.2.1",
  "extractor": "mt_metadata (community canonical)",
  "software": {
   "python": "3.12.14",
   "mt_metadata": "1.0.10",
   "mth5": "0.6.8"
  },
  "git_commit": "25c90921c42c72bbc5455b4bbdab9137cf8b8e48",
  "parameters": {
   "dimensionality": {
    "beta_per_period_deg": 3.0,
    "skew_3d_deg": 5.0,
    "pct_periods_3d_threshold": 40,
    "ellip_2d_deg": 0.1,
    "min_rez_row_sine": 0.01,
    "beta_physical_cap_deg": 15.0,
    "min_usable_period_frac": 0.5,
    "skew_aggregation": "median"
   },
   "diagnostic": "completeness/smoothness (median rel error + coverage + smoothness)"
  },
  "generated": "2026-09-09T06:22:47.791693+00:00",
  "input_file": "WAT.edi",
  "input_sha256": "3730a74374c21901af5dadcb20a90336b638fb71fe9420500deccd7c49a0ebdf"
 },
 "coordinate_qc": null,
 "canonical_conditioning": null,
 "frame": {
  "evidence": {
   "branch": "mt",
   "zrot": null,
   "trot": null,
   "rotspec": null,
   "hmeas_azimuths": {
    "hx": 0.0,
    "hy": 90.0
   },
   "emeas_azimuths": {
    "ex": null,
    "ey": null
   }
  },
  "impedance_rotation_deg_source": null,
  "tipper_rotation_deg_source": null,
  "derotated": false,
  "frame_served": "declared-zero",
  "declared_azimuth_deg": 0.0,
  "convention_check": {
   "verdict": "insufficient",
   "phs_xy_median_deg": null,
   "phs_yx_median_deg": null,
   "n_periods_used": 0,
   "detail": "only 0 usable period(s) (< 5) — no convention verdict"
  }
 },
 "resources": [
  {
   "id": "edi",
   "kind": "transfer_function",
   "format": "edi",
   "provenance_role": "source",
   "representation_role": "original",
   "path": "edi/samas-1995/WAT.edi"
  },
  {
   "id": "mth5",
   "kind": "transfer_function",
   "format": "mth5",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "h5/samas-1995/WAT.h5"
  },
  {
   "id": "edi-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/samas-1995-edi.zip"
  },
  {
   "id": "survey-mth5",
   "kind": "archive",
   "format": "mth5",
   "path": "bundles/samas-1995-tf.h5"
  }
 ]
}