{
 "schema": "ausmt-station",
 "version": "0.1",
 "ausmt_id": "au.stuart-shelf-2009.ST70",
 "station": "ST70",
 "survey": "Stuart Shelf Long-Period MT Survey 2009 (Adelaide University)",
 "survey_id": "stuart-shelf-2009",
 "country": "Australia",
 "organisation": "Adelaide University",
 "location": {
  "lat": -30.38593,
  "lon": 137.05627
 },
 "data": {
  "type": "LPMT",
  "n_periods": 20,
  "period_min_s": 10.666667,
  "period_max_s": 8192.020972
 },
 "diagnostics": {
  "median_relative_error": 0.102,
  "remote_reference": false,
  "tipper_available": true,
  "completeness_smoothness_diagnostic": {
   "value": 3.2,
   "basis": "e",
   "note": "not a quality or geological-value judgement"
  },
  "classification": "3-D",
  "skew_beta_median_deg": 2.1,
  "pct_periods_3d": 41,
  "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": "source.file=SA_STS_70.edi (01-94/EDI/SA_STS_70.edi)\nsource.collection=The University of Adelaide Magnetotellurics Data, doi:10.4225/41/5a618c3ae30ab, NCI node States_and_Territories/SA/Long_Period/Stuart_Shelf_2009, folder 01-94/EDI\nsource.sha256=f5bdc041408d624af701a5091c438622a1f1626f1fdce33e87bbf6b772e5b339\nsource.copy=provenance/as-delivered/SA_STS_70.edi in this package, byte identical to the collection\nrepair.defect=the collection header writes ACQDATE=18/06/2009 and FILEDATE=15/07/2009 day first, a form the common reader takes month first; read as delivered this station's start agreed only because the day exceeds 12\nrepair.change=ACQDATE rewritten 18/06/2009 to 2009-06-18 and FILEDATE rewritten 15/07/2009 to 2009-07-15; no other byte is changed apart from the padding after a value whose length changed\nrepair.basis=the collection writes day first: 69 of the 88 ACQDATE values in date form and 73 of the 90 FILEDATE values carry a day above 12 and neither field carries a month above 12 in any of the 90 files, and read day first 63 of the 88 equal the start date the owner's field sheet records for that station while read month first none of them does\nrepair.ruling=owner ruling 2026-09-19: the Stuart Shelf licence is CC-BY-4.0 and the package proceeds, under the repair rule of 2026-09-18 that a header defect the reader refuses or misreads is repaired in the served copy with the delivered file kept in provenance\nrepair.by=AusMT, _tools/repair_edi_header_dates.py"
 },
 "distribution": {
  "edi_available": true,
  "license": "CC-BY-4.0",
  "edi_path": "edi/stuart-shelf-2009/ST70.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": "ST70.edi",
  "input_sha256": "818d9ce07baff94bd4ed4eebe76c61d40064b5b63b270925c5ef6902f40ffc0b"
 },
 "coordinate_qc": null,
 "canonical_conditioning": [
  "survey.id->stuart-shelf-2009",
  "survey.project->Stuart_Shelf_2009",
  "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:Adelaide University",
  "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": 20,
   "phs_xy_median_deg": 40.47,
   "phs_yx_median_deg": -128.5,
   "verdict": "ok"
  },
  "declared_azimuth_deg": 0.0,
  "derotated": false,
  "evidence": {
   "branch": "mt",
   "emeas_azimuths": {
    "ex": null,
    "ey": null
   },
   "hmeas_azimuths": {
    "hx": 0.0,
    "hy": 90.0
   },
   "rotspec": null,
   "trot": null,
   "zrot": null
  },
  "frame_served": "declared-zero",
  "impedance_rotation_deg_source": null,
  "tipper_rotation_deg_source": null
 },
 "runs": [
  {
   "id": "ST70_001",
   "time_period": {
    "start": "2009-06-18T04:00:00.000000+00:00",
    "end": "2009-06-21T01:00:00.000000+00:00"
   },
   "sample_rate_hz": 10.0,
   "data_logger": {
    "manufacturer": "Earth Data Ltd",
    "model": "PR6-24",
    "serial_number": "60993",
    "identifiers": [
     {
      "scheme": "DOI",
      "identifier": "10.82388/ygxhw2p5"
     }
    ]
   },
   "channels": [
    {
     "component": "ex",
     "measurement_azimuth_deg": 0.0,
     "dipole_length_m": 38.0
    },
    {
     "component": "ey",
     "measurement_azimuth_deg": 90.0,
     "dipole_length_m": 45.0
    },
    {
     "component": "hx",
     "sensor": {
      "manufacturer": "Bartington"
     }
    },
    {
     "component": "hy",
     "sensor": {
      "manufacturer": "Bartington"
     }
    },
    {
     "component": "hz"
    }
   ]
  }
 ],
 "resources": [
  {
   "id": "edi",
   "kind": "transfer_function",
   "format": "edi",
   "provenance_role": "source",
   "representation_role": "original",
   "path": "edi/stuart-shelf-2009/ST70.edi"
  },
  {
   "id": "emtfxml",
   "kind": "transfer_function",
   "format": "emtfxml",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "xml/stuart-shelf-2009/ST70.xml"
  },
  {
   "id": "mth5",
   "kind": "transfer_function",
   "format": "mth5",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "h5/stuart-shelf-2009/ST70.h5"
  },
  {
   "id": "edi-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/stuart-shelf-2009-edi.zip"
  },
  {
   "id": "xml-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/stuart-shelf-2009-xml.zip"
  },
  {
   "id": "survey-mth5",
   "kind": "archive",
   "format": "mth5",
   "path": "bundles/stuart-shelf-2009-tf.h5"
  }
 ]
}