{
 "schema": "ausmt-station",
 "version": "0.1",
 "ausmt_id": "au.broken-hill-2002.bhe01",
 "station": "bhe01",
 "survey": "Broken Hill 2002",
 "survey_id": "broken-hill-2002",
 "country": "Australia",
 "organisation": "University of Adelaide",
 "location": {
  "lat": -31.694889,
  "lon": 140.498972
 },
 "data": {
  "type": "GDS",
  "n_periods": 24,
  "period_min_s": 10.666667,
  "period_max_s": 2048.005243
 },
 "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 kit's .gds induction-arrow file\n(columns Period, Real Arrow, Angle, Quad Arrow, Angle).  Coordinates and\nelevations from GDS/GDS_AusMT/broken-hill-mundi-mundi-2007/gds/\nstationXYZ_Period512.txt.  Station inventory:\nGDS/inventories/gds_bhe_mun_2007_stations.csv.\n\nCONVENTION: the .gds Angle is the sign-reversed polar Parkinson arrow angle.\nThis was verified against an independent file pair from the same processing\ntoolchain, GDS/'Eyre Peninsula_data 2004'/FMT2/GDS/eyr.arr (which prints the\ntipper components Z/X and Z/Y) and .../eyr.gds (which prints arrow and angle\nfor the same run): on every period, arrow = hypot(Zx,Zy) and Angle =\natan2(-Zy,-Zx). Conversion here is therefore\nTXR = -R.cos(A)   TYR = -R.sin(A)   TXI = -Q.cos(B)   TYI = -Q.sin(B).\n\nVARIANCES: the .gds files carry no uncertainty column, so TXVAR.EXP and\nTYVAR.EXP are OMITTED rather than fabricated.\n\nFRAME: not stated in the .gds files.  Written as produced.\n\nSURVEY: the bhe profile is identified as Gill, R. (2002) 'A Magnetotelluric\nProfile across the Broken Hill and Olary Domains', Honours thesis,\nUniversity of Adelaide (hdl:2440/113040); its Table 1 sites B-01..B-16 (no\nB-12) match these positions to the printed second of arc.  Fieldwork 2002;\nthe .gds files are a later re-processing carried through 2007, so no\nacquisition date is written here. OWNER RULING: bhe and mun are two separate\nsurveys and are minted into separate directories.\n\nSTATION: bhe01.  Elevation 120.0 m from stationXYZ_Period512.txt. Dates in\nthis file are ISO 8601."
 },
 "distribution": {
  "edi_available": true,
  "license": "CC-BY-4.0",
  "edi_path": "edi/broken-hill-2002/bhe01.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": "bhe01.edi",
  "input_sha256": "2dbe91260ecbce8c15fbc8232a3b93a9f58fef8ec990ae280bb6d3e636fcf4ff"
 },
 "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/broken-hill-2002/bhe01.edi"
  },
  {
   "id": "mth5",
   "kind": "transfer_function",
   "format": "mth5",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "h5/broken-hill-2002/bhe01.h5"
  },
  {
   "id": "edi-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/broken-hill-2002-edi.zip"
  },
  {
   "id": "survey-mth5",
   "kind": "archive",
   "format": "mth5",
   "path": "bundles/broken-hill-2002-tf.h5"
  }
 ]
}