cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.qqa8q6
title: Occurrence Download

description: A dataset containing 26 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Pao cochinchinensis)",
 "BasisOfRecord is one of (Specimen, Literature Occurrence, Human Observation, Observation)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1991",
 "Year is less than or equal to 2025"
 ]
}

 The dataset includes 26 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032562-250811113504898/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.qw9snp
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chrysemys picta",
 "Country is Argentina",
 "HasCoordinate is true"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032563-250811113504898/datasets/export for details.
DOI: 10.15468/dl.vgqg8t
title: Occurrence Download

description: A dataset containing 33 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chrysemys picta",
 "Country is Germany",
 "HasCoordinate is true"
 ]
}

 The dataset includes 33 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032564-250811113504898/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.78urjg
title: Occurrence Download

description: A dataset containing 174476 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "TaxonKey is Potamogeton natans"
 ]
}

 The dataset includes 174476 records from 1104 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032500-250811113504898/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.eyeacw
title: Occurrence Download

description: A dataset listing the 1491 species recorded in GBIF matching the query:
{
 "and" : [
 "Country is Mexico",
 "DatasetKey is iNaturalist Research-grade Observations",
 "Geometry POLYGON((-86.88405 20.92762,-87.19115 20.93144,-87.58014 20.59451,-87.69889 20.35668,-87.6948 20.2261,-87.44093 20.27604,-86.88405 20.92762))",
 "HasGeospatialIssue is false",
 "Year 2001-2025"
 ]
}

 The dataset's 1491 records were derived from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032540-250811113504898/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.362r4z
title: Occurrence Download

description: A dataset containing 156283 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "TaxonKey is Atriplex patula"
 ]
}

 The dataset includes 156283 records from 1031 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032495-250811113504898/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.15277373
title: PCoE Randomized Battery Usage Data Set

description: Dataset from batteries continuously cycled with randomly generated current profiles. Reference charging and discharging cycles are also performed after a fixed interval of randomized usage to provide reference benchmarks for battery state of health.

Part of PCoE Datasets: https://www.nasa.gov/intelligent-systems-division/discovery-and-systems-health/pcoe/pcoe-data-set-repository/
DOI: 10.5281/zenodo.15277374
title: PCoE Randomized Battery Usage Data Set

description: Dataset from batteries continuously cycled with randomly generated current profiles. Reference charging and discharging cycles are also performed after a fixed interval of randomized usage to provide reference benchmarks for battery state of health.

Part of PCoE Datasets: https://www.nasa.gov/intelligent-systems-division/discovery-and-systems-health/pcoe/pcoe-data-set-repository/
DOI: 10.15468/dl.mde34s
title: Occurrence Download

description: A dataset containing 60527 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is one of (Benin, France)",
 "TaxonKey is one of (Canis lupus Linnaeus, 1758, Triplochiton scleroxylon K.Schum.)"
 ]
}

 The dataset includes 60527 records from 323 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003107-250515123054153/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.46egr7
title: Occurrence Download

description: A dataset containing 2217 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((13.03875 47.38824,72.23236 47.38824,72.23236 71.03881,13.03875 71.03881,13.03875 47.38824))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Anthemis cotula L."
 ]
}

 The dataset includes 2217 records from 75 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003114-250515123054153/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wyy2tn
title: Occurrence Download

description: A dataset containing 474 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((162.27227 -22.60165,169.29627 -22.60165,169.29627 -19.78915,162.27227 -19.78915,162.27227 -22.60165))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Amborella trichopoda Baill."
 ]
}

 The dataset includes 474 records from 24 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003115-250515123054153/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.rnu2ut
title: Occurrence Download

description: A dataset containing 210020 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Alca torda Linnaeus, 1758",
 "HasCoordinate is true",
 "Year is greater than 1989",
 "Year is less than 2026",
 {
 "not" : {
 "OccurrenceStatus" : [
 "is Absent"
 ]
 }
 },
 "CoordinateUncertaintyInMeters is less than or equal to 1000"
 ]
}

 The dataset includes 210020 records from 137 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003108-250515123054153/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.53n4ef
title: Occurrence Download

description: A dataset containing 6 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "Country is Chile",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Solanum sitiens"
 ]
}

 The dataset includes 6 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0028918-251025141854904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.15272145
title: ECDI

description: Cleaned, anonymized data supporting "Extended Childhood Disorder (ECD): Proposal and Empirical Support for a New Ecologically-Based Diagnostic Category of Teen Dysfunction."
DOI: 10.5281/zenodo.15272146
title: ECDI

description: Cleaned, anonymized data supporting "Extended Childhood Disorder (ECD): Proposal and Empirical Support for a New Ecologically-Based Diagnostic Category of Teen Dysfunction."
DOI: 10.15468/dl.4zmyvb
title: Occurrence Download

description: A dataset containing 45976 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Spain",
 "TaxonKey is Aquila chrysaetos (Linnaeus, 1758)"
 ]
}

 The dataset includes 45976 records from 57 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0011091-250415084134356/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.3nu6qt
title: Occurrence Download

description: A dataset containing 1211004 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Aves",
 "Year is 2006",
 "Month is August"
 ]
}

 The dataset includes 1211004 records from 487 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002477-250426092105405/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/xjs-g29-wy6
title: Deltote (Protodeltote) pygarga (Hufnagel, 1766)

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.6084/m9.figshare.31062499
title: Heatwaves Intensify the Impact of Drought on Crop Resilience: Implications for the Black Soil Region of Northeast China

description: Data on droughts, heatwaves, compound events, and their impacts on crops
DOI: 10.6084/m9.figshare.31062499.v1
title: Heatwaves Intensify the Impact of Drought on Crop Resilience: Implications for the Black Soil Region of Northeast China

description: Data on droughts, heatwaves, compound events, and their impacts on crops
DOI: 10.5281/zenodo.18240422
title: CELL INJURY, CELL DEATH, AND CELLULAR AGING: MECHANISMS, MORPHOLOGY, AND BIOLOGICAL SIGNIFICANCE
DOI: 10.3535/nds-yq7-tyv
title: Xestia (Pachnobia) subgrisea (Staudinger, 1898)

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/xvq-2lh-q9l
title: Xestia (Pachnobia) subgrisea (Staudinger, 1898)

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.5281/zenodo.18240421
title: CELL INJURY, CELL DEATH, AND CELLULAR AGING: MECHANISMS, MORPHOLOGY, AND BIOLOGICAL SIGNIFICANCE
DOI: 10.5281/zenodo.18240456
title: Alopecurus myosuroides Huds. In: Marchesi E., Mailhos A. & Bonifacino J.M. (Eds.). Flora Uruguaya: Flora Vascular del Uruguay. ISSN 3121-2050, V. 1.0.

description: Citable snapshot. Includes PDF and CSV of collections. Date: January 13th, 2026 at 16:41
DOI: 10.5281/zenodo.18240457
title: Alopecurus myosuroides Huds. In: Marchesi E., Mailhos A. & Bonifacino J.M. (Eds.). Flora Uruguaya: Flora Vascular del Uruguay. ISSN 3121-2050, V. 1.0.

description: Citable snapshot. Includes PDF and CSV of collections. Date: January 13th, 2026 at 16:41
DOI: 10.5281/zenodo.18240474
title: Aloysia Paláu. In: Marchesi E., Mailhos A. & Bonifacino J.M. (Eds.). Flora Uruguaya: Flora Vascular del Uruguay. ISSN 3121-2050, V. 1.0.

description: Citable snapshot. Includes PDF and CSV of collections. Date: January 13th, 2026 at 16:41
DOI: 10.15468/dl.4seam4
title: Occurrence Download

description: A dataset containing 1222 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Geometry POLYGON((111.357 21.461,115.422 21.461,115.422 24.392,111.357 24.392,111.357 21.461))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Paramesotriton hongkongensis"
 ]
}

 The dataset includes 1222 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008159-260108223611665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.18240480
title: Aloysia chamaedryfolia Cham. In: Marchesi E., Mailhos A. & Bonifacino J.M. (Eds.). Flora Uruguaya: Flora Vascular del Uruguay. ISSN 3121-2050, V. 1.0.

description: Citable snapshot. Includes PDF and CSV of collections. Date: January 13th, 2026 at 16:41
DOI: 10.5281/zenodo.18240479
title: Aloysia chamaedryfolia Cham. In: Marchesi E., Mailhos A. & Bonifacino J.M. (Eds.). Flora Uruguaya: Flora Vascular del Uruguay. ISSN 3121-2050, V. 1.0.

description: Citable snapshot. Includes PDF and CSV of collections. Date: January 13th, 2026 at 16:41
DOI: 10.15468/dl.akcrwt
title: Occurrence Download

description: A dataset containing 19342 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Cassytha filiformis"
 ]
}

 The dataset includes 19342 records from 486 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008156-260108223611665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/8kt-73p-7lk
title: Deltote (Protodeltote) pygarga (Hufnagel, 1766)

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/xkd-q1d-jfx
title: Deltote (Protodeltote) pygarga (Hufnagel, 1766)

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.15468/dl.va4d2k
title: Occurrence Download

description: A dataset containing 28 species occurrences available in GBIF matching the query:
{"type":"and","predicates":[{"type":"equals","key":"GADM_LEVEL_2_GID","value":"USA.19.42_1","matchCase":false},{"type":"equals","key":"CLASS_KEY","value":"212","matchCase":false},{"type":"greaterThanOrEquals","key":"YEAR","value":"2015","matchCase":false},{"type":"not","predicate":{"type":"in","key":"BASIS_OF_RECORD","values":["MATERIAL_CITATION","MATERIAL_SAMPLE","PRESERVED_SPECIMEN"],"matchCase":false}},{"type":"lessThanOrEquals","key":"COORDINATE_UNCERTAINTY_IN_METERS","value":"10000","matchCase":false},{"type":"equals","key":"LICENSE","value":"CC BY 4.0","matchCase":false}]}

 The dataset includes 28 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008158-260108223611665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.gr4azp
title: Occurrence Download

description: A dataset containing 30 species occurrences available in GBIF matching the query:
{
 "and" : [
 "OccurrenceStatus is Present",
 "TaxonKey is one of (Manglietia dandyi, Manglietia aromatica, Lirianthe henryi)"
 ]
}

 The dataset includes 30 records from 9 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008160-260108223611665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9sayn6
title: Occurrence Download

description: A dataset containing 8381 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Acacia farnesiana"
 ]
}

 The dataset includes 8381 records from 440 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008157-260108223611665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/dbn-8gb-yjg
title: Deltote (Protodeltote) pygarga (Hufnagel, 1766)

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/xb4-93s-sbb
title: Sideridis (Aneda) Sukhareva, 1973

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.15468/dl.6n6e4e
title: Occurrence Download

description: A dataset containing 49648 records in GBIF matching the query:
SELECT
 kingdom,
 kingdomkey,
 phylum,
 phylumkey,
 class,
 classkey,
 "order",
 orderkey,
 family,
 familykey,
 genus,
 genuskey,
 species,
 specieskey,
 "year",
 IF(ISNULL(kingdomkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY kingdomkey, "year")) kingdomcount,
 IF(ISNULL(phylumkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY phylumkey, "year")) phylumcount,
 IF(ISNULL(classkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY classkey, "year")) classcount,
 IF(ISNULL(orderkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY orderkey, "year")) ordercount,
 IF(ISNULL(familykey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY familykey, "year")) familycount,
 IF(ISNULL(genuskey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY genuskey, "year")) genuscount,
 COUNT(*) occurrences,
 MIN(GBIF_TEMPORALUNCERTAINTY(eventdate, eventtime)) mintemporaluncertainty,
 MIN(COALESCE(coordinateuncertaintyinmeters, 1000)) mincoordinateuncertaintyinmeters
FROM
 occurrence
WHERE
 occurrence.datasetkey IN ('4fa7b334-ce0d-4e88-aaae-2e0c138d049e', '902c8fe7-8f38-45b0-854e-c324fed36303', '9f0e1ca6-fb08-4c72-9a4a-1e3b7a528c10', '68513375-3aa5-4f6f-9975-d97d56c21d61', '82a53efc-f762-11e1-a439-00145eb45e9a', '07044577-bd82-4089-9f3a-f4a9d2170b2e', 'ba19fc1d-670c-426b-b99d-49f003792ac4', 'bb5b30b4-827e-4d5e-a86a-825d65cb6583', '1af83152-24f7-4df7-afbc-b213b62175bb')
 AND (occurrence.level0gid IN ('UZB', 'KAZ', 'TJK', 'AFG', 'TKM', 'KGZ') OR occurrence.level1gid IN ('UZB', 'KAZ', 'TJK', 'AFG', 'TKM', 'KGZ') OR occurrence.level2gid IN ('UZB', 'KAZ', 'TJK', 'AFG', 'TKM', 'KGZ') OR occurrence.level3gid IN ('UZB', 'KAZ', 'TJK', 'AFG', 'TKM', 'KGZ'))
 AND occurrence.hasgeospatialissues = FALSE
 AND NOT GBIF_STRINGARRAYCONTAINS(occurrence.issue, 'TAXON_MATCH_FUZZY', TRUE)
 AND (occurrence.distancefromcentroidinmeters &gt;= 2000.0 OR occurrence.distancefromcentroidinmeters IS NULL)
 AND NOT occurrence.basisofrecord IN ('FOSSIL_SPECIMEN', 'LIVING_SPECIMEN')
 AND occurrence.occurrencestatus = 'PRESENT'
 AND (occurrence.specieskey IS NOT NULL AND occurrence."year" IS NOT NULL)
GROUP BY
 occurrence.kingdom,
 occurrence.kingdomkey,
 occurrence.phylum,
 occurrence.phylumkey,
 occurrence.class,
 occurrence.classkey,
 occurrence."order",
 occurrence.orderkey,
 occurrence.family,
 occurrence.familykey,
 occurrence.genus,
 occurrence.genuskey,
 occurrence.species,
 occurrence.specieskey,
 occurrence."year"

 The dataset's 49648 records were derived from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008144-260108223611665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/jnr-9zg-31j
title: Sideridis (Aneda) Sukhareva, 1973

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/wsr-ckx-fg9
title: Deltote (Protodeltote) pygarga (Hufnagel, 1766)

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/9cw-hpx-abb
title: Sideridis (Aneda) Sukhareva, 1973

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.3535/egq-kd6-2yn
title: Deltote (Protodeltote) pygarga (Hufnagel, 1766)

description: Digital Specimen for the physical specimen hosted at Finnish Museum of Natural History.
DOI: 10.15468/dl.pn6433
title: Occurrence Download

description: A dataset containing 17 species occurrences available in GBIF matching the query:
{"type":"and","predicates":[{"type":"equals","key":"GADM_LEVEL_2_GID","value":"USA.19.43_1","matchCase":false},{"type":"equals","key":"CLASS_KEY","value":"212","matchCase":false},{"type":"greaterThanOrEquals","key":"YEAR","value":"2015","matchCase":false},{"type":"not","predicate":{"type":"in","key":"BASIS_OF_RECORD","values":["MATERIAL_CITATION","MATERIAL_SAMPLE","PRESERVED_SPECIMEN"],"matchCase":false}},{"type":"lessThanOrEquals","key":"COORDINATE_UNCERTAINTY_IN_METERS","value":"10000","matchCase":false},{"type":"equals","key":"LICENSE","value":"CC BY 4.0","matchCase":false}]}

 The dataset includes 17 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008162-260108223611665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.18240520
title: Aloysia citrodora Paláu. In: Marchesi E., Mailhos A. & Bonifacino J.M. (Eds.). Flora Uruguaya: Flora Vascular del Uruguay. ISSN 3121-2050, V. 1.0.

description: Citable snapshot. Includes PDF and CSV of collections. Date: January 13th, 2026 at 16:41
DOI: 10.5281/zenodo.18240521
title: Aloysia citrodora Paláu. In: Marchesi E., Mailhos A. & Bonifacino J.M. (Eds.). Flora Uruguaya: Flora Vascular del Uruguay. ISSN 3121-2050, V. 1.0.

description: Citable snapshot. Includes PDF and CSV of collections. Date: January 13th, 2026 at 16:41
DOI: 10.5281/zenodo.18233471
title: Spatially resolved transcriptome reveals the selectively vulnerable oligodendrocytes within fornix fiber in Alzheimer's disease

description: File oli.qs contains single-nucleus oligodendrocyte RNA sequencing data from multiple regions of the mouse brain. This dataset is quality-controlled and annotated.                                                                                                                                                                                 

File ST_sample.h5ad contain spatial transcriptomics data from two mouse brain slices.
DOI: 10.15468/dl.s6wh98
title: Occurrence Download

description: A dataset containing 31 species occurrences available in GBIF matching the query:
{"type":"and","predicates":[{"type":"equals","key":"GADM_LEVEL_2_GID","value":"USA.19.44_1","matchCase":false},{"type":"equals","key":"CLASS_KEY","value":"212","matchCase":false},{"type":"greaterThanOrEquals","key":"YEAR","value":"2015","matchCase":false},{"type":"not","predicate":{"type":"in","key":"BASIS_OF_RECORD","values":["MATERIAL_CITATION","MATERIAL_SAMPLE","PRESERVED_SPECIMEN"],"matchCase":false}},{"type":"lessThanOrEquals","key":"COORDINATE_UNCERTAINTY_IN_METERS","value":"10000","matchCase":false},{"type":"equals","key":"LICENSE","value":"CC BY 4.0","matchCase":false}]}

 The dataset includes 31 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008165-260108223611665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.18240455
title: Polarization measurements and source locations of Saturn electrostatic discharges during the Voyager era

description: Abstract:

A Saturn Electrostatic Discharge or SED is an intense electromagnetic impulse induced by Saturn lightning, which escapes into space through the magnetoplasma of the ionosphere. Since previous SED polarizations from Voyager data are inconclusive, this polarization study is the first which properly considers the characteristics of the Voyager Planetary Radio Astronomy (PRA) instrument and the change of the antenna response as a function of spacecraft attitude. SED radio observations of the Cassini spacecraft from 2004 to 2017 showed a hemispheric dependence of their circular polarization sense at frequencies below 2 MHz, which can be explained by left-hand ordinary mode emissions. Here we reinvestigated the SED polarizations of the Voyager radio observations at frequencies below 1.3 MHz. As a result, we found mixed polarizations and a dominance of right-handed polarization, which is difficult to interpret in view of the Cassini result. However, we found that SEDs incident at large angles to the antenna plane (elevation angle |β| ≥40°) showed a dominance of the expected left-handed polarization. We show detailed results of the SED polarization analysis and also compare them with model simulations of the Voyager PRA signal processing of short SED-like pulses. An equatorial SED source was suggested by its occurrence periodicity for both Voyagers, but imaging observations clearly detected convective clouds at 35°N latitude. We demonstrate with Cassini data that the so-called over-the-horizon effect can mimic an equatorial periodicity, even when the single SED source is at 35°N latitude. For Voyager 2 also equatorial clouds were imaged.

Note:This paper was re-submitted to Journal of Geophysical Research: Planets for the 2nd revision. This page provides the digital data for Figures 3-11 and A1 in this paper; please read a readme file or a single text file in each figure sub-directory.