{
 "schema": "ausmt-survey-metadata",
 "version": "0.1",
 "survey_id": "paralana-2010",
 "title": "Paralana Geothermal Broadband MT Survey 2010 (Adelaide University)",
 "dates": {
  "coverage": {
   "year_start": 2010,
   "year_end": 2010
  }
 },
 "abstract": "Fifty six broadband magnetotelluric soundings recorded by Adelaide University between 4 and 10 March 2010 over the Paralana enhanced geothermal system in the northern Flinders Ranges, South Australia; 50 are served and six are withheld. This is the baseline campaign, before the 2011 fluid injection that the later Paralana campaigns monitored. Two crossing lines about 14 km long, with infill between them, span 139.66 to 139.80 east. Each site recorded Ex, Ey, Hx and Hy at 500 Hz on an Earth Data PR6-24 logger through LEMI-120 induction coils, and the two remote reference sites the processing names are outside this package. Served periods run 0.0107 to 218 seconds, 24 to 43 a station. No station carries a vertical field transfer function. Every file is served in the frame it declares. Six soundings are withheld because the sign gate refuses them, and four of the served carry impedances three orders of magnitude above the rest; README.md and the comment block above carry the caveats.",
 "subjects": [
  {
   "code": "370602",
   "scheme": "ANZSRC-FoR-2020",
   "label": "Electrical and electromagnetic methods in geophysics",
   "uri": "https://linked.data.gov.au/def/anzsrc-for/2020/370602"
  }
 ],
 "creators": [
  {
   "name": "Heinson, Graham",
   "name_type": "person",
   "orcid": "0000-0001-7106-0789"
  }
 ],
 "organisations": [
  {
   "name": "Adelaide University",
   "ror": "https://ror.org/028g18b61",
   "roles": [
    "custodian",
    "publisher",
    "data_collector"
   ],
   "primary_custodian": true
  },
  {
   "name": "National Computational Infrastructure",
   "ror": "https://ror.org/04yx6dh41",
   "roles": [
    "publisher",
    "hosting_institution"
   ]
  }
 ],
 "rights": {
  "license": "CC-BY-4.0",
  "access": "open"
 },
 "extent": {
  "bbox": {
   "west": 139.6567,
   "south": -30.2715,
   "east": 139.8001,
   "north": -30.1539
  }
 },
 "relationships": [
  {
   "identifier": "10.4225/41/5a618c3ae30ab",
   "identifier_type": "DOI",
   "relation": "IsPartOf"
  },
  {
   "identifier": "10.25914/5bea579d41e8f",
   "identifier_type": "DOI",
   "relation": "IsDerivedFrom"
  }
 ],
 "attribution": {
  "custodian": "Adelaide University",
  "custodian_ror": "https://ror.org/028g18b61",
  "statement": "Sourced from the Paralana March 2010 holding of The University of Adelaide Magnetotellurics (MT) data collection, DOI 10.4225/41/5a618c3ae30ab, licensed CC BY 4.0. Header dates have been repaired in 27 of the 50 served copies; every source file behind a repaired copy is kept unaltered under provenance/as-delivered/ and every change is recorded in the served file itself.",
  "changes_made": true,
  "changes_summary": "The served set is 50 of the 56 soundings the collection holds for this survey. Six are withheld: pb36, because its estimate is defective rather than its convention, and pb23, pb30, pb34, pb35 and pb53, which the engine's sign gate refuses with the x/y axis-swap signature and which are withheld under owner ruling 2026-09-19 (the YMB057 precedent), applied by precedent because the owner has not ruled on them individually. Every withheld station's source file is kept unaltered under provenance/as-delivered/ with the evidence in provenance/served-files.json. 23 served files are byte identical to their source file. The other 27, all from the 2010 original broadband rendition, have their ACQDATE and FILEDATE values rewritten from day/month/year into ISO 8601 by _tools/repair_edi_header_dates.py, with nine lines inserted after each file's >INFO line naming the source file, its path in the collection, its sha256, the kept copy, the defect, the change, the basis, the ruling and the tool. Nothing else in any file is changed: no data block, no other header line, no padding and no line ending, proved file by file against provenance/as-delivered/. Only the filenames are AusMT's, and they are each file's own DATAID. The basis for reading the delivery day first is that across the 56 files of that rendition no ACQDATE and no FILEDATE value carries a month above 12, the ACQDATE months are 03 and 05 only, the day fields reach 21 and 31, and 55 of the 56 ACQDATE values print the four-digit 2010, which is what the two-digit FILEDATE year 10 was resolved to. No number, no position, no frame and no gate verdict is altered by the repair.",
  "declared_by": "Ben",
  "declared_date": "2026-09-19"
 },
 "provenance": {
  "generated": "2026-09-20T05:05:11Z",
  "generator": "ausmt/extract.build_portal 0.2.1"
 }
}