{
 "schema": "ausmt-station",
 "version": "0.1",
 "ausmt_id": "au.hanekop-eastern-qld-2003.ARD",
 "station": "ARD",
 "survey": "Hanekop Eastern Queensland 2003",
 "survey_id": "hanekop-eastern-qld-2003",
 "country": "Australia",
 "organisation": "Institut fuer Geophysik, Georg-August-Universitaet Goettingen",
 "location": {
  "lat": -21.662,
  "lon": 139.096
 },
 "data": {
  "type": "GDS",
  "n_periods": 4,
  "period_min_s": 16.0,
  "period_max_s": 1024.0
 },
 "diagnostics": {
  "median_relative_error": null,
  "remote_reference": true,
  "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": "Egbert",
  "algorithm": null,
  "remote_reference": true,
  "remote_site": null,
  "file_written_by": {
   "name": null,
   "version": null
  },
  "note": "ausmt_record=values recovered from the figures of a doctoral thesis; no numeric table of any transfer function is published in that document\nausmt_source_author=Hanekop, Ole\nausmt_source_year=2006\nausmt_source_title=Large scale resistivity surveys combining magnetic and magnetotelluric observations, Examples from central Australia\nausmt_source_institution=Georg-August-Universitaet zu Goettingen\nausmt_source_file=hanekop-thesis-2006.pdf\nausmt_source_sha256=2eb424149ca2353f66c47b012ea80914b4510ee2e5d8afecb907fac27611b889\nausmt_method=read from the vector drawing operators of the named figures; not digitised from pixels, not read from any table\nausmt_rho_figure=none; this station has no readable sounding panel\nausmt_tipper_figure=Figure 4.4, page 50\nausmt_tipper_colour_key=the caption of Figure 4.4 binds real to black and imaginary to red; only the left column of that figure is read, the right column carrying decomposition output rather than a transfer function\nausmt_tipper_periods_printed_s=16, 64, 256, 1024\nausmt_tipper_map_fit=longitude 0.004318 degree, latitude 0.000017 in the Mercator ordinate; the map fit decides which station an arrow attaches to and does not enter the arrow value, which is a ratio of two drawn lengths\nausmt_tipper_convention=Wiese, stated in section 2.2.2 on page 16; the arrow points away from a conductor\nausmt_tipper_scale=vector from arrow tail to tip divided by the printed reference arrow of the figure, which reads 0.5\nausmt_tipper_variance=absent; Figure 4.4 draws no uncertainty and none has been synthesised\nausmt_frame=geomagnetic; page 43 states acquisition in the geomagnetic coordinate system and pages 94 to 97 label the curves unrotated\nausmt_frame_declaration=ZROT and the HMEAS azimuths carry the magnetic declination at this site, uniform across periods; nothing in this file is rotated\nausmt_frame_declination_deg=6.2421\nausmt_frame_declination_model=IGRF evaluated with ppigrf at the Table A.1 coordinate, geodetic, sea level\nausmt_frame_declination_epoch=2003-09-01\nausmt_coordinate_source=Table A.1, page 93, three decimal places\nausmt_coordinate_datum=not stated in the thesis\nausmt_elevation=not carried by the source\nausmt_absent_impedance_diagonal=Zxx and Zyy are not drawn in any figure and have not been synthesised\nausmt_absent_impedance=the two sounding panels for this station on page 95 each plot two markers of one component in one frequency column, with a full error bar on each, so the figure gives no way to tell the two estimates apart and neither panel was read\nausmt_absent_gds_tensor=the geomagnetic depth sounding perturbation tensor of this campaign is drawn only as raster images in Figures A.5 and A.6 and cannot be recovered from this document at any useful precision\nausmt_prior_holding=8 of the arrow values served here were also held before this release, in a tipper-only file that reached AusMT through a Geoscience Australia data drop whose own upstream is unestablished; that file is kept verbatim at provenance/legacy-edi/ARD.edi\nausmt_prior_holding_agreement=worst vector difference 0.0095 over 8 compared arrows; row by row in provenance/legacy-arrow-comparison.csv\nausmt_prior_holding_precision=the prior values are quantised to 0.01 in magnitude and to one degree in azimuth and carry no statement of the scale they were read against\nausmt_prior_holding_scale=across the survey the prior magnitudes run a median 1.0204 times the values served here, over 117 arrows of magnitude 0.10 or more; which reading carries the correct scale is unresolved, and the recovery is served because it is the only one of the two that states its scale\nausmt_recording_window=2003-08-21 08:14 to 2003-08-22 00:40, 1 window(s), 0.68 cumulative days, from Figure A.1, page 94\nausmt_recording_time_zone=not stated in the thesis\nausmt_acquisition=Goettingen RAP data logger, Magson fluxgate magnetometer, Ag/AgCl electrodes, five channels, page 43\nausmt_processing=Goettingen remote reference, cross-checked against Egbert and Booker, page 43; GDS reference site ARG, page 54"
 },
 "distribution": {
  "edi_available": true,
  "license": "CC-BY-4.0",
  "edi_path": "edi/hanekop-eastern-qld-2003/ARD.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": "ARD.edi",
  "input_sha256": "e256e07ce3700226d49a5510c5348d2daf2c780f009a4456f2919b60c2cd1c67"
 },
 "coordinate_qc": null,
 "canonical_conditioning": [
  "survey.id->hanekop-eastern-qld-2003",
  "survey.project->Central_Australian_MT_and_GDS_campaign_2003",
  "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",
  "channel orientations: degenerate/defaulted (ex and ey azimuths both 0 deg — parallel dipoles are non-physical); orientations NOT asserted by source EMEAS geometry",
  "citation.authors<-survey_meta:Hanekop, Ole",
  "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)",
  "statistical_estimates: writer emitted an empty <StatisticalEstimates/>; rebuilt from the estimate blocks the document carries"
 ],
 "frame": {
  "evidence": {
   "branch": "mt",
   "zrot": "6.24212",
   "trot": "6.24212",
   "rotspec": null,
   "hmeas_azimuths": {
    "hx": 6.2421,
    "hy": 96.2421
   },
   "emeas_azimuths": {
    "ex": 6.2421,
    "ey": 96.2421
   }
  },
  "impedance_rotation_deg_source": null,
  "tipper_rotation_deg_source": null,
  "derotated": false,
  "frame_served": "declared-azimuth",
  "declared_azimuth_deg": 6.2421,
  "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/hanekop-eastern-qld-2003/ARD.edi"
  },
  {
   "id": "emtfxml",
   "kind": "transfer_function",
   "format": "emtfxml",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "xml/hanekop-eastern-qld-2003/ARD.xml"
  },
  {
   "id": "mth5",
   "kind": "transfer_function",
   "format": "mth5",
   "provenance_role": "derived",
   "representation_role": "alternate",
   "path": "h5/hanekop-eastern-qld-2003/ARD.h5"
  },
  {
   "id": "edi-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/hanekop-eastern-qld-2003-edi.zip"
  },
  {
   "id": "xml-zip",
   "kind": "archive",
   "format": "zip",
   "path": "bundles/hanekop-eastern-qld-2003-xml.zip"
  },
  {
   "id": "survey-mth5",
   "kind": "archive",
   "format": "mth5",
   "path": "bundles/hanekop-eastern-qld-2003-tf.h5"
  }
 ]
}