{"help":"Return the metadata of a dataset (package) and its resources. :param id: the id or name of the dataset :type id: string","success":true,"result":[{"id":"258268e3-7437-4333-8190-777fab84e304","name":"data-noisy-spectra-particle-properties-machine-learning-analysis-enceladus-plume-spectral","title":"Data from: Noisy spectra to Particle properties: A machine learning analysis of Enceladus plume spectral data using Cassini-VIMS observations","author":"Himanshi Sharma, Matthew M Hedman","author_email":"hbbhardwaj02@gmail.com","maintainer":"RCDS Data Repository","maintainer_email":"rcds-web@uidaho.edu","license_title":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","notes":"\u003Cp\u003EThe physical properties of Enceladus plume particles can shed light on the processes responsible for driving the moon\u0027s geological activity. Cassini\u0027s Visual and Infrared Mapping Spectrometer (VIMS) recorded near-infrared spectra of the plume for three Enceladus orbits around Saturn in 2017 that show variations reflecting changes in the typical plume particle size over various timescales. We translate these spectra into information about the plume-particle\u0027s size distribution using a machine learning model trained on Mie-theory predictions for the light scattered by various tenuous particle populations. This algorithm considers multiple realizations of random noise on top of both the observed and predicted spectra in order to obtain more stable estimates of the size distribution parameters. These models reveal that the typical particle size may decrease with increasing altitude, but this stratification is only detectable when Enceladus is far from its orbital apocenter and the plume is less active. The average particle size also appears to increase as the orbital phase increases after Enceladus passed through its apocenter during the observations on Jun 18th and Aug 2nd, but not during the observation on Aug 28th. Secondly, the maximum particle size in the plume appears to be elevated on Aug 2nd, which may be due to a highly collimated jet that was active only on that date. These patterns might indicate that there are different sources for the particles and their intensity may be changing over time.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EData Use\u003C\/strong\u003E\u003Cbr \/\u003E\n\u003Cem\u003ELicense\u003C\/em\u003E:\u003Cbr \/\u003E\nCreative Commons Attribution 4.0 International (\u003Ca href=\u0022https:\/\/creativecommons.org\/licenses\/by\/4.0\/\u0022\u003ECC-BY 4.0\u003C\/a\u003E)\u003Cbr \/\u003E\n\u003Cem\u003ERecommended Citation\u003C\/em\u003E:\u003Cbr \/\u003E\nSharma H, Hedman MM. 2024. Data from: Noisy spectra to Particle properties: A machine learning analysis of Enceladus plume spectral data using Cassini-VIMS observations [Dataset]. University of Idaho. \u003Ca href=\u0022https:\/\/doi.org\/10.7923\/8phz-dr49\u0022\u003Ehttps:\/\/doi.org\/10.7923\/8phz-dr49\u003C\/a\u003E\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EFunding\u003C\/strong\u003E\u003Cbr \/\u003E\nNASA Cassini Data Analysis Program: 80NSSC18K1071\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EAncillary Raw Data\u003C\/strong\u003E\u003Cbr \/\u003E\n\u003Ca href=\u0022https:\/\/pds-atmospheres.nmsu.edu\/data_and_services\/atmospheres_data\/Cassini\/inst-vims.html\u0022\u003ECassini VIMS: Visual and Infrared Mapping Spectrometer\u003C\/a\u003E\u003C\/p\u003E\n","url":"https:\/\/data.nkn.uidaho.edu\/dataset\/data-noisy-spectra-particle-properties-machine-learning-analysis-enceladus-plume-spectral","state":"Active","log_message":"Edited by awchild.","private":true,"revision_timestamp":"Fri, 09\/13\/2024 - 11:40","metadata_created":"Wed, 09\/11\/2024 - 13:36","metadata_modified":"Fri, 09\/13\/2024 - 11:40","creator_user_id":"6cc16f2c-77c2-4d12-ac06-56bbb86b535b","type":"Dataset","resources":[{"id":"1e45727e-2c2b-4b86-a7f4-cae1b066a3f5","revision_id":"","url":"https:\/\/www.northwestknowledge.net\/data\/258268e3-7437-4333-8190-777fab84e304\/metadata.txt","description":"","format":"txt","state":"Active","revision_timestamp":"Thu, 09\/12\/2024 - 10:52","name":"Metadata Access | Data from: Noisy spectra to Particle properties: A machine learning analysis of Enceladus plume spectral data using Cassini-VIMS observations (project level metadata in txt format)","mimetype":"txt","size":"","created":"Thu, 09\/12\/2024 - 10:52","resource_group_id":"89a02fc8-c98e-44bb-9d3e-2d3d0849fbca","last_modified":"Date changed Thu, 09\/12\/2024 - 10:52"},{"id":"04b59b56-aa3a-4e0d-8dcb-c2b29a8c7526","revision_id":"","url":"https:\/\/www.northwestknowledge.net\/data\/258268e3-7437-4333-8190-777fab84e304\/8phz-dr49.xml","description":"","format":"xml","state":"Active","revision_timestamp":"Thu, 09\/12\/2024 - 10:53","name":"Metadata Access | Data from: Noisy spectra to Particle properties: A machine learning analysis of Enceladus plume spectral data using Cassini-VIMS observations (DataCite metadata in xml format)","mimetype":"xml","size":"","created":"Thu, 09\/12\/2024 - 10:53","resource_group_id":"89a02fc8-c98e-44bb-9d3e-2d3d0849fbca","last_modified":"Date changed Thu, 09\/12\/2024 - 10:53"},{"id":"490f4478-36df-4a4c-9b2a-44226ffd7eb2","revision_id":"","url":"https:\/\/www.northwestknowledge.net\/data\/258268e3-7437-4333-8190-777fab84e304","description":"","format":"WAF","state":"Active","revision_timestamp":"Thu, 09\/12\/2024 - 10:54","name":"Data Access | Data from: Noisy spectra to Particle properties: A machine learning analysis of Enceladus plume spectral data using Cassini-VIMS observations (web accessible folder)","mimetype":"WAF","size":"","created":"Thu, 09\/12\/2024 - 10:54","resource_group_id":"89a02fc8-c98e-44bb-9d3e-2d3d0849fbca","last_modified":"Date changed Thu, 09\/12\/2024 - 10:54"}],"tags":[{"id":"abc33f6e-b650-4050-a73e-daab76280f30","vocabulary_id":"2","name":"Cassini-VIMS"},{"id":"f893ee69-9922-4208-9308-6a38904f1faa","vocabulary_id":"2","name":"Enceladus Plume"},{"id":"9e1e6826-2de7-42c2-a0ca-89e93e719b2a","vocabulary_id":"2","name":"machine learning"}],"groups":[{"description":"\u003Cp\u003ESince 1889, the University of Idaho has provided motivated students with a transformative higher education experience that prepares them to solve real-world problems and achieve success in their lives and careers.\u003C\/p\u003E\n\u003Cp\u003ELearn more at \u003Ca href=\u0022https:\/\/www.uidaho.edu\u0022\u003Ehttps:\/\/www.uidaho.edu\u003C\/a\u003E\u003C\/p\u003E\n","id":"89a02fc8-c98e-44bb-9d3e-2d3d0849fbca","image_display_url":"https:\/\/data.nkn.uidaho.edu\/sites\/default\/files\/UI_Main_horizontal_4c.jpg","title":"University of Idaho","name":"group\/university-idaho"}]}]} Error | RCDS Data Repository

Error

The website encountered an unexpected error. Please try again later.