{
 "schema": "ausmt-station",
 "version": "0.1",
 "ausmt_id": "au.southwest-traverse-1966.Zanthus",
 "station": "Zanthus",
 "survey": "Southwest Australia Traverse 1966",
 "survey_id": "southwest-traverse-1966",
 "country": "Australia",
 "organisation": "Australian National University",
 "location": {
  "lat": -31.03,
  "lon": 123.58
 },
 "data": {
  "type": "GDS",
  "n_periods": 1,
  "period_min_s": 3599.9712,
  "period_max_s": 3599.9712
 },
 "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; the NCI rendition filed under this name\ncarries register id 273's arrows, not this station's, for the reason\ndescribed below.\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: Everett and Hyndman (1967a) PEPI 1, 24-34, verified station by\nstation against their Table 1; Hyndman (1967) ANU thesis (hdl:1885/7546)\nTable 9.1 is the second print.  Fieldwork June to September 1966.\n\nIDENTITY TRAP: register id 273 ZAN, reference code 9 (AWAGS, 1989-90), sits\n1.46 km away and carries a seventeen-period arrow set.  This station's\nregister row is a SINGLE 60 min value, which is the whole of what the 1966\ntraverse left in the compilation.  A seventeen-period file at this\ncoordinate is the AWAGS station, not this one.\n\nIDENTITY: register STATION_ID 361, FULL_NAME Zanthus, SHO ZAN,\nREFERENCE_CODE 14, register E_LONG 123.58, S_LAT -31.03, MAG_DEC 1.724.\nIdentity is the STATION_ID plus the coordinate, never the three-letter SHO\ncode: SHO codes collide across the compilation (five KOOs, three MORs and\nMUNs, two NORs, GREs, WARs and DARs). Dates in this file are ISO 8601."
 },
 "distribution": {
  "edi_available": true,
  "license": "CC-BY-4.0",
  "edi_path": "edi/southwest-traverse-1966/Zanthus.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": "Zanthus.edi",
  "input_sha256": "8694e2130bc8e9f2d7de2a7782a70b6bacc8c06dd7600b36a277f0d699c8b685"
 },
 "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/southwest-traverse-1966/Zanthus.edi"
  },
  {
   "id": "edi-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/southwest-traverse-1966-edi.zip"
  }
 ]
}