{
 "schema": "ausmt-station",
 "version": "0.1",
 "ausmt_id": "au.cf23-2021.BB170",
 "station": "BB170",
 "survey": "CF23 Magnetotelluric Survey 2021 (Geological Survey of Queensland)",
 "survey_id": "cf23-2021",
 "country": "Australia",
 "organisation": "Geological Survey of Queensland",
 "location": {
  "lat": -24.702139,
  "lon": 139.577306
 },
 "data": {
  "type": "AMT",
  "n_periods": 108,
  "period_min_s": 0.0001,
  "period_max_s": 11650.844238
 },
 "diagnostics": {
  "median_relative_error": 0.0,
  "remote_reference": false,
  "tipper_available": true,
  "completeness_smoothness_diagnostic": {
   "value": 5.0,
   "basis": "e",
   "note": "not a quality or geological-value judgement"
  },
  "classification": "1-D",
  "skew_beta_median_deg": 0.4,
  "pct_periods_3d": 30,
  "method": "phase-tensor (Caldwell 2004)",
  "note": "screening diagnostic, not an interpretation product"
 },
 "processing": {
  "software": "Empower",
  "algorithm": null,
  "remote_reference": false,
  "remote_site": null,
  "file_written_by": {
   "name": "EMpower",
   "version": "v1.54.2.3"
  },
  "note": "source.file=BB170.edi (collection.zip!mt100164/PreferredEdis.zip!preferred_edis/P_BB170_R_BB140_H_Unedited.edi)\nsource.collection=Geological Survey of Queensland Open Data Portal record mt100164, fetched as collection.zip, member mt100164/PreferredEdis.zip, folder preferred_edis\nsource.sha256=5208c0253b333b0613f48cc062510ead9f7efae11114b5e3d31ece71c88b69e6\nsource.copy=provenance/as-delivered/BB170.edi in this package, byte identical to the delivery\nrepair.defect=the >INFO block is an EMpower JSON document and mt_metadata 1.0.4 parses it as key and value text, so the JSON separator after the Declination value makes the value the text 6.5 followed by a comma, which is not a number, and the reader refuses the file\nrepair.change=2 separators moved from the end of a Declination line to the start of the line after it; the JSON document parses to the same object, line endings are kept and no other byte of the delivery is changed\nrepair.basis=read as delivered this file returns no transfer function; read after the change it returns 108 periods, a declination of 6.5 and both gate verdicts\nrepair.ruling=the owner repair rule of 2026-09-18, a header defect the reader refuses is repaired in the served copy and the delivered file is kept under provenance/as-delivered/\nrepair.by=AusMT, _tools/repair_edi_info_json_separator.py\n{\n\"10054_2021-05-26-051435\": {\n\"acqtime\": 236733,\n\"bat_ext\": 11.952,\n\"calibration\": {\n\"type\": \"none\"\n},\n\"channel_map\": {\n\"mapping\": [\n{\n\"idx\": 0,\n\"tag\": \"E1\"\n},\n{\n\"idx\": 1,\n\"tag\": \"H3\"\n},\n{\n\"idx\": 2,\n\"tag\": \"H2\"\n},\n{\n\"idx\": 3,\n\"tag\": \"H1\"\n},\n{\n\"idx\": 4,\n\"tag\": \"H4\"\n},\n{\n\"idx\": 5,\n\"tag\": \"H5\"\n},\n{\n\"idx\": 6,\n\"tag\": \"H6\"\n},\n{\n\"idx\": 7,\n\"tag\": \"E2\"\n}\n],\n\"receiver_model\": \"RMT05\",\n\"version\": 1\n},\n\"chconfig\": {\n\"chans\": [\n{\n\"at\": 0,\n\"cn\": \"10280000\",\n\"dc\": 32500,\n\"fileSeq\": 3946,\n\"frameDrop\": 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0,\n\"processed_site_name\": \"P=BB170 R=BB140 (H)\",\n\"reference_type\": \"magnetic\",\n\"start\": 1622010216,\n\"status\": \"approved\",\n\"stop\": 1622237899,\n\"time_elapsed\": 1188,\n\"time_zone\": \"local_time\",\n\"time_zone_offset\": 0,\n\"uuid\": \"{33fdcc7b-fb3c-4a1f-8c37-2705d546bb40}\",\n\"version\": 3\n}"
 },
 "distribution": {
  "edi_available": true,
  "license": "CC-BY-4.0",
  "edi_path": "edi/cf23-2021/BB170.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": "e208b15fb70740d8c44de51c532e6debd59c4e24",
  "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": "2026-09-20T04:08:35.832153+00:00",
  "input_file": "BB170.edi",
  "input_sha256": "1bccab9bffb0e10ddcbae84d93ead196ee9aba2f016f83c652eb05f425e8ad32"
 },
 "coordinate_qc": null,
 "canonical_conditioning": [
  "survey.id->cf23-2021",
  "survey.geographic_name sanitized",
  "station.geographic_name sanitized",
  "rotation: unknown — writer requires array; zeros written, frame NOT asserted",
  "sign_convention: '+' is a library default — EDI carries no machine-readable sign convention; NOT asserted by source",
  "declination.epoch/model: library defaults (epoch=None, model=IGRF) — an EDI states only the declination value; epoch/model NOT asserted by source",
  "citation.authors<-survey_meta:Simpson, J.; Brown, D.; Kyi, D.; Cant, R.; Purdy, D.; Blake, P.; Greenwood, M.; Killen, D.; Degeling, H.",
  "citation.title<-survey_meta",
  "copyright.release_status=Data Citation Required; conditions_of_use set from licence CC-BY-4.0 (replaced mt_metadata default boilerplate)"
 ],
 "frame": {
  "convention_check": {
   "detail": null,
   "n_periods_used": 108,
   "phs_xy_median_deg": 31.39,
   "phs_yx_median_deg": -146.44,
   "verdict": "ok"
  },
  "declared_azimuth_deg": 0.0,
  "derotated": false,
  "evidence": {
   "branch": "spectra",
   "emeas_azimuths": {
    "ex": null,
    "ey": null
   },
   "hmeas_azimuths": {
    "hx": 0.0,
    "hy": 90.0
   },
   "rotspec": "0",
   "trot": null,
   "zrot": null
  },
  "frame_served": "declared-zero",
  "impedance_rotation_deg_source": null,
  "tipper_rotation_deg_source": null
 },
 "runs": [
  {
   "id": "BB170-r01",
   "sample_rate_hz": 24000.0,
   "data_logger": {
    "model": "RMT05",
    "serial_number": "10054"
   },
   "channels": [
    {
     "component": "ex"
    },
    {
     "component": "ey"
    },
    {
     "component": "hx"
    },
    {
     "component": "hy"
    },
    {
     "component": "hz"
    }
   ]
  }
 ],
 "resources": [
  {
   "id": "edi",
   "kind": "transfer_function",
   "format": "edi",
   "provenance_role": "source",
   "representation_role": "original",
   "path": "edi/cf23-2021/BB170.edi"
  },
  {
   "id": "emtfxml",
   "kind": "transfer_function",
   "format": "emtfxml",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "xml/cf23-2021/BB170.xml"
  },
  {
   "id": "mth5",
   "kind": "transfer_function",
   "format": "mth5",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "h5/cf23-2021/BB170.h5"
  },
  {
   "id": "edi-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/cf23-2021-edi.zip"
  },
  {
   "id": "xml-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/cf23-2021-xml.zip"
  },
  {
   "id": "survey-mth5",
   "kind": "archive",
   "format": "mth5",
   "path": "bundles/cf23-2021-tf.h5"
  }
 ]
}