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   "family": "yearlocationdex",
   "latest_url": "https://data.terrapulse.info/dex/ncca_water_quality/latest.parquet",
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   "latest_url": "https://data.terrapulse.info/dex/nuclear_explosion/latest.parquet",
   "sources": [
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    "dna_6039f",
    "dna_6028f",
    "dna_6032f",
    "dna_6033f",
    "dna_6022f",
    "dna_6034f",
    "dna_6023f",
    "dna_6019f",
    "dna_6036f",
    "dna_6014f",
    "dna_6035f",
    "dna_6009f",
    "dna_6037f",
    "dna_6005f",
    "dna_6038f",
    "dna_6026f",
    "dna_6040f",
    "dna_6027f",
    "dtra_tr_16_070",
    "ndl_tr34",
    "uk_hurricane_pm_statement",
    "uk_hurricane_trial_report",
    "lanl_la8819",
    "dtra_semipalatinsk",
    "lanl_hawkins_2013",
    "mikhailov_1996",
    "fr_mindef_2006_polynesie"
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   "licence_basis": "US federal works (DOE catalog; DNA/DoD reports; LANL report LA-8819 served openly by DOE's OSTI) - public domain by statute (17 U.S.C. 105). UK Crown documents (Hurricane): published Crown copyright of 1952-53 expired (50-year term); TNA public records reusable under the Open Government Licence. USSR catalog (Mikhailov 1996, 715 tests): the official release of two Russian state ministries, carrying no copyright notice or rights reservation - official documents of state bodies are excluded from copyright by Russian Civil Code Art. 1259(6). French Pacific programme (Ministere de la defense 2006, Annexe 2, 166 tests): official publication of the French defence ministry. For both non-US lanes the dex takes FIELDS ONLY - dates, times, places, energies - never prose; facts are not copyrightable subject matter (ruling: Mike, 2026-09-05, ../terrapulse/docs/source-licences.md)."
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   "latest_url": "https://data.terrapulse.info/dex/nws_warning/latest.parquet",
   "sources": [
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   "licence_basis": "NWS VTEC warning products - US federal work, public domain by statute (17 U.S.C. 105); the polygons/CSV are Iowa Environmental Mesonet derivatives placed in the public domain by IEM's own Usage terms (disclaimer.php, read 2026-09-11): 'may be used freely by anyone for any lawful purpose'. Attribute the Iowa Environmental Mesonet, Iowa State University. Scope frozen 2026-09-11."
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   "sources": [
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   "sources": [
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   "latest_url": "https://data.terrapulse.info/dex/solar_wind/latest.parquet",
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   "family": "yeardex",
   "latest_url": "https://data.terrapulse.info/dex/solar_xray_flux/latest.parquet",
   "sources": [
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    "spdf_oso3_xuv",
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   "licence_basis": "US federal work - public domain by statute (17 U.S.C. 105); the OSO 3 ion-chamber years and the OGO 5 Berkeley X-ray years are NASA SPDF restorations of experimenters' tapes (SPDF Rules of the Road, measured facts)."
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   "latest_url": "https://data.terrapulse.info/dex/spacecraft_field_measurements/latest.parquet",
   "sources": [
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    "spdf_mariner2",
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    "spdf_mariner4_mag",
    "spdf_explorer28_mag",
    "spdf_ogo2_mag",
    "spdf_pioneer6_mag30s",
    "spdf_pioneer6_maghr",
    "spdf_ogo3_searchcoil",
    "spdf_explorer33_gsfc_mag",
    "spdf_explorer33_ames_mag",
    "spdf_pioneer7_mag30s",
    "spdf_pioneer7_maghr",
    "spdf_ats1_mag15s",
    "spdf_ats1_mag2p5",
    "spdf_ariel3_hf_noise",
    "spdf_imp4_mag25",
    "spdf_imp4_mag20",
    "spdf_explorer35_gsfc_mag82",
    "spdf_explorer35_ames_mag5",
    "spdf_ogo4_mag",
    "spdf_ogo5_fg4",
    "spdf_ogo5_fg1m_gsm",
    "spdf_ogo5_fg_highrate",
    "spdf_ogo5_searchcoil",
    "spdf_ogo5_plasma_wave"
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   "licence_basis": "NASA SPDF open-data archive (Rules of the Road: freely available, no use restriction; acknowledgment requested). US government missions (Explorer 12, Mariner 2, Explorer 18, Explorer 21, Mariner 4, Explorer 28, OGO 2, Pioneer 6, OGO 3, Explorer 33, Pioneer 7, ATS 1, IMP 4, Explorer 35); recovered NSSDC archive hosted by NASA. Ariel 3 (UK, Radio and Space Research Station): the experimenter's tapes deposited at NSSDC and served by SPDF on the same terms; measured facts, not expression."
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   "latest_url": "https://data.terrapulse.info/dex/spacecraft_particle_counts/latest.parquet",
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    "spdf_ats2_omni",
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    "spdf_imp4_chicago_rast",
    "spdf_imp4_utd_anisotropy",
    "spdf_imp4_gsfc_273min",
    "spdf_imp4_btl_lest",
    "spdf_explorer35_ic",
    "spdf_pioneer8_cr",
    "spdf_ogo5_berkeley_el",
    "spdf_ogo5_berkeley_pa",
    "spdf_ogo5_heavy_nuclei",
    "spdf_ogo5_e13_realtime",
    "spdf_ogo5_e13_playback",
    "spdf_ogo5_chicago_e09",
    "spdf_ov1_13_electrons",
    "spdf_injun5_master",
    "spdf_injun5_ssd"
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   "licence_basis": "NASA SPDF open-data archive (Rules of the Road: freely available, no use restriction; acknowledgment requested). US government missions (Explorer 4, Explorer 7, Injun 1, Injun 3, Telstar 1, Telstar 2, Relay 1, Transit 5E-1, OGO 1, Explorer 21, Injun 4, Mariner 4, Explorer 26, Explorer 28, Pioneer 6, OGO 3, Explorer 33, Pioneer 7, ATS 1, ATS 2, IMP 4, Explorer 35, Pioneer 8, OGO 5, OV1-13 (USAF), Injun 5); investigator-supplied records restored by NSSDC and hosted by NASA. Alouette 2 (Canada, NRC): the experimenter's tapes deposited at NSSDC, same terms. Zond 3, Venera 2, Venera 3 and Venera 4 (USSR): Moscow State University measurements restored under NASA grant NAG5-4656 and served by SPDF with the same terms (acknowledgment of SPDF and TASPD SINP MSU requested); measured facts, not expression."
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