{
 "schema": "ausmt-station",
 "version": "0.1",
 "ausmt_id": "au.black-hill-2005-06.BH20-18",
 "station": "BH20-18",
 "survey": "Black Hill 2005-06",
 "survey_id": "black-hill-2005-06",
 "country": "Australia",
 "organisation": "Geological Survey of South Australia",
 "location": {
  "lat": -34.2131,
  "lon": 139.322867
 },
 "data": {
  "type": "BBMT",
  "n_periods": 36,
  "period_min_s": 0.004196,
  "period_max_s": 149.790294
 },
 "diagnostics": {
  "median_relative_error": 0.016,
  "remote_reference": true,
  "tipper_available": true,
  "completeness_smoothness_diagnostic": {
   "value": 5.0,
   "basis": "e",
   "note": "not a quality or geological-value judgement"
  },
  "classification": "2-D",
  "skew_beta_median_deg": 1.7,
  "pct_periods_3d": 33,
  "method": "phase-tensor (Caldwell 2004)",
  "note": "screening diagnostic, not an interpretation product"
 },
 "processing": {
  "software": null,
  "algorithm": null,
  "remote_reference": true,
  "remote_site": null,
  "file_written_by": {
   "name": "Geotools",
   "version": "2.3"
  },
  "note": "ausmt.station.id=BH20-18\nderivation.class=contractor-processed\nderivation.class_note=the transfer function in this file is the contractor's own output, as the custodian delivered it, re-expressed from the delivered cross-spectra and rotated into the published frame by AusMT. It carries a complete tensor: diagonal and off diagonal impedance with variances, and tipper with variances. Every station of this survey declares derivation.class and its value is one of exactly two. The other value, figure-recovered, marks a station whose transfer function was read off a printed sounding figure because no data file for it survives; those stations carry no diagonal and no tipper variance, and write an absent value as the literal nan.\nausmt.station.line=20\nausmt.station.site=18\nausmt.station.repeat_suffix=none\nausmt.station.sectid=s2018_ed\nausmt.station.identity_source=SECTID on the source SPECTRASECT block; DATAID in the source names the project and never the station\nausmt.station.identity_confirmed_by_position=yes\nausmt.station.report_residual_m=0.1\nausmt.station.position_source=source header, longitude repaired\nausmt.station.latitude_deg=-34.213100\nausmt.station.longitude_deg=139.322867\nausmt.station.easting_m=345500.0\nausmt.station.northing_m=6212943.9\nausmt.station.grid=EPSG:28354\nausmt.station.n_periods=36\nsource.file=LineNo_20_StationNo_8.edi\nsource.sha256=8e0d621fb1ccf4bc8b76db50918de2a974c851a9db6aa5fd9ebc2557766148ee\nsource.delivery=SARIG, Geological Survey of South Australia\nsource.sa_geodata_survey=electrical techniques survey 22, BLACK HILL, 229 sites\nsource.tenements=EL 3304, EL 3305\nsource.dataset=2012. Magnetotelluric and geomagnetic depth sounding surveys\nsource.dataset_pid=https://pid.sarig.sa.gov.au/dataset/mesac1113\nsource.document=Crabb, T.N.; Mortimer, L.; Doerner, W.; Maude, G. Black Hill Intrusive Complex (northern [Bower - Florieton] and southern [Cambrai] areas). Joint annual report plus final report to licences' joint expiry/full surrender, for the period 17/2/2005 to 16/2/2007. Mineral Company Report, Mineral Exploration. Envelope 11269.\nsource.document_pid=https://pid.sarig.sa.gov.au/document/mesac21595\nsource.license=Creative Commons Attribution 4.0, stated on the dataset record, released under section 77D of the Mining Act 1971\nsource.acqdate=10/20/05\nsource.enddate=12/14/05\nsource.progvers=GEOTOOLS_2.3\nsource.county=Eudunda\nrotation.applied_deg=-90.0\nrotation.convention=x north y east, Z_std = R Z R^T with theta = -declared frame\nrotation.tool=sarig_rotate\nrotation.tool_version=1.0.0\nrotation.error_convention=per component variances added in quadrature through the same real linear map that rotates the tensor, components assumed uncorrelated and isotropic in the complex plane; exact at multiples of 90 degrees; total variance conserved because the map is orthogonal\nrotation.declared_frame_deg=90.0\nconversion.spectra_to_impedance=mt_metadata 1.0.6\nrepair.defect=the source longitude 139:19:22:32 carries four colon separated fields where an angle has three\nrepair.action=the final colon read as the decimal point it stands for, giving 139:19:22.32, on a copy of the source; the delivery itself is unchanged\nrepair.evidence=repaired, the position falls 0.1 m from line 20 site 18 in the report's line 20 coverage table, the site the SECTID names\nrepair.copy_sha256=f4af73250f54298de5e4b0ed55a9e410fcacf2e08de46b134b8e6f3dd791c4fa\nausmt.survey.name=Black Hill\nausmt.survey.project_code=QCL-414\nausmt.survey.client=INCO RESOURCES (AUSTRALIA) PTY LTD\nausmt.survey.contractor=Quantech Consulting Inc.\nausmt.survey.report=MT Geophysical Survey Logistics Report\nausmt.survey.council=Regional Council of Goyder and Mid Murray Council\nausmt.survey.technique=Tensor soundings, remote-referenced\nausmt.survey.station_configuration=\"L\" shaped E-field array; Ex, East, Ey - North; 3 Low Frequencies coils Hx, Hy, Hz\nausmt.survey.dipole_length_m=100.0\nausmt.survey.frequency_bandwidth_hz=0.001 to 250 Hz; Operating: 0.001 to 1000 Hz Effective: 1000s to 400 Hz\nausmt.survey.receiver_system=Quantec RT-130 Data Logger, comprising: - 6 channels max. per system (5 channels operationally) with internal A/D conversion (24bit @120db, and buffer memory (6Mb). - 2 Recording Units (loggers), deployed simultaneously for recording site and remote reference - 2 GPS synchronization clocks (10nsec precision /12.3MHz clock-speed)\nausmt.survey.receiver_coils=6 EMI model BF-4/BF-7/ BF-21 (10000sec to 1000Hz) Magnetometers (Hx-Hy-Hz), 3 at each site\nausmt.survey.receiver_electrodes=Ground contacts using steel plates\nausmt.survey.time_series_sampling=1000 samples/sec\nausmt.survey.sample_record_time=1 to 8 events @ 2 hrs. per event (total recording time approx. 2 to 14 hours)\nausmt.survey.post_processing_software=QGL QuickLay 2.25.28 version\nausmt.survey.edi_software=Geotools\nausmt.survey.data_presentation=- Maps: Sounding Curves: MT Apparent Resistivity and Phase (XY and YX), Tipper Transfer Function (XrXi & YrYi) (See Appendix B). Pseudosection Plots: MT Apparent Resistivity and Phase Pseudosections (XY, and YX), posted, contoured (equal area zoning) and plotted, in ground units (See Appendix C). - Digital: Raw data: Base and Remote Raw data, qtpi directory (i.e. qtpi - 231005-BhL05_0001 - 231005-BhL05_0001.net that contains information on the location and time of the event). Archived onto data DVD's daily. Processed data: MT DATA, in .EDI (electronic data interchange) file, created in GeotoolsTM containing tensor sounding data (XY & YX), for individual stations (sites) and profiles (site-sets), in a format conforming to SEG standard for the storage MT data.\nausmt.survey.remote_reference_site.1=Site 00 345177E; 6198138N (see Figure 3)\nausmt.survey.remote_reference_site.2=Site 0A 372693E; 6251054N (see Figure 2)\nausmt.survey.remote_reference_site.3=Site 03 342756E; 6198246N (see Figure 3)\nausmt.survey.campaign.1=2005-10-19 to 2005-12-14, 60 days elapsed, 50 days read time\nausmt.survey.campaign.2=2006-01-17 to 2006-02-15, 32 days elapsed, 29 days read time\nausmt.survey.personnel.data_processing_office=Susanna Scappin, Julia Milne\nausmt.survey.personnel.field_technicians=Trent Retallick, Sandy Tonner, Michael Klimpton, Ben Clare, Dave Richardson, Damon Gilbert, Dave Clinton, Matteo Rizzi\nausmt.survey.personnel.geophysicists_interpreters=Bill Doerner\nausmt.survey.personnel.project_manager=Bill Doerner\nausmt.survey.report_pages=1, 4, 5, 6, 7, 10, 11, 20, 21, 22\nausmt.survey.redaction_note=The report's contents list 17 site coverage tables, for lines 2, 4, 8, 10, 11, 12, 16, 19, 20, 21, 22, 23, 24, 25, 26, 27 and 28, and 13 reach the body: the tables for lines 12, 16, 25 and 26 went with the neighbouring tenement when the original report was edited for release, page 1 noting that it also included data from EL3122. Those four lines are tabulated instead in the EL 3122 annual technical report, SARIG document mesac25554."
 },
 "distribution": {
  "edi_available": true,
  "license": "CC-BY-4.0",
  "edi_path": "edi/black-hill-2005-06/BH20-18.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": "7df0aa799037de85121d3e96e467172abe865b3e",
  "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": "2026-09-11T23:45:27.655986+00:00",
  "input_file": "BH20-18.edi",
  "input_sha256": "6d59c626cdb70d5d9605631bff01011f2146d68619ee71b31b82ff6193d500be"
 },
 "coordinate_qc": null,
 "canonical_conditioning": [
  "survey.id->black-hill-2005-06",
  "station.id set to the sanitised EMTF-XML Site.id",
  "station.source_id_preserved_in_site_name",
  "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:Crabb, T.N.; Mortimer, L.; Doerner, W.; Maude, G.",
  "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": {
  "evidence": {
   "branch": "mt",
   "zrot": "0",
   "trot": "0",
   "rotspec": null,
   "hmeas_azimuths": {
    "hx": 0.0,
    "hy": 90.0
   },
   "emeas_azimuths": {
    "ex": 0.0,
    "ey": 90.0
   }
  },
  "impedance_rotation_deg_source": null,
  "tipper_rotation_deg_source": null,
  "derotated": false,
  "frame_served": "declared-zero",
  "declared_azimuth_deg": 0.0,
  "convention_check": {
   "verdict": "ok",
   "phs_xy_median_deg": 28.0,
   "phs_yx_median_deg": -162.7,
   "n_periods_used": 36,
   "detail": null
  }
 },
 "resources": [
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   "id": "edi",
   "kind": "transfer_function",
   "format": "edi",
   "provenance_role": "source",
   "representation_role": "original",
   "path": "edi/black-hill-2005-06/BH20-18.edi"
  },
  {
   "id": "emtfxml",
   "kind": "transfer_function",
   "format": "emtfxml",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "xml/black-hill-2005-06/BH20-18.xml"
  },
  {
   "id": "mth5",
   "kind": "transfer_function",
   "format": "mth5",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "h5/black-hill-2005-06/BH20-18.h5"
  },
  {
   "id": "edi-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/black-hill-2005-06-edi.zip"
  },
  {
   "id": "xml-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/black-hill-2005-06-xml.zip"
  },
  {
   "id": "survey-mth5",
   "kind": "archive",
   "format": "mth5",
   "path": "bundles/black-hill-2005-06-tf.h5"
  }
 ]
}