CCMC Metadata Registry (CMR) |
|
Go to: |
SEPSTER (v2)SEP prediction inspired by STEREO observationsModel DescriptionThe SEP prediction inspired by STEREO observations (SEPSTER) is a simple model to predict the peak intensity of 14-24 MeV protons in solar energetic particle (SEP) events near 1 AU that is based on the longitudinal intensity variation of SEP events observed by both STEREO spacecraft and at the Earth and their dependence on the speed of the related coronal mass ejection derived by Richardson et al., Solar Physics, 289, 3059, 2014; DOI 10.1007/s11207-014-0524-8, Solar Physics. This method uses as input φ is the connection angle (longitude) between the solar event and the solar footpoint of the spiral magnetic field line passing the observing spacecraft, and σ is the Gaussian width; 43° is the average value found by Richardson et al. (2014). Another input is the speed of a CME. Combining this with the connection angle estimated for a 1 AU observer either using the solar event longitude or the direction of the CME, then the 14-24 MeV SEP intensity at the observer can be estimated. If applied to all CMEs, this method produces many false alarms which may be reduced by considering the solar radio emissions associated with the CMEs or requiring a minimum speed and/or width for the CME. This is described in Richardson, Mays and Thompson, Space Weather, 2018. For example when combined with solar radio observations, for 36 events with observed intensities above 0.1 pfu at 14-24 MeV, the mean predicted to observed intensity ratio is 0.671 and around 75% of the predicted intensities are within an order of magnitude of those observed. Model Figure(s) :Model Inputs DescriptionCME speed and connection angle. Optionally: CME width, solar radio emissions. Model Outputs DescriptionPeak 14-24 MeV SEP intensity Model CaveatsChange LogVersion 2.6 was deployed at the CCMC on May 6, 2024. The changes in version 2.6 include: - Only use the Leading Edge (LE) CME measurements from DONKI as input for SEPSTER predictions. - Updated request URL to the iSWA HAPI calls from “dscovr_plasma_1m” to “swpc_rtsw_plasma_P1M”. iSWA updated the catalog ID in Feb 2024. - Observatory name in Parker Spiral JSON files now changed from “DSCOVR” to “SWPC-RTSW”, inline with iSWA changes Version 2.4 was deployed at the CCMC on June 28, 2023. The changes in version 2.4 include: - The use of the CCMC iSWA HAPI API to fetch solar wind speed data to run the model. - Improved logic for determining when to switch from DSCOVR to ACE solar wind data (obtained from iSWA). This is to address the issue of incomplete DSCOVR data that occurred when the DSCOVR data is unavailable on iSWA. The original SEPSTER logic could not handle this scenario and therefore did not switch to ACE. Model Acknowledgement/Publication Policy (if any)Model Domains:Heliosphere.Inner_HeliosphereSpace Weather Impacts:Solar energetic particles - SEPs (human exploration, aviation safety, aerospace assets functionality)Phenomena :Solar_Energetic_ParticlesSimulation Type(s):EmpiricalTemporal Dependence Possible? (whether the code results depend on physical time?)falseModel is available at?CCMCSource code of the model is publicly available?falseCCMC Model Status (e.g. onboarding, use in production, retired, only hosting output, only source is available):productionCode Language:CRegions (this is automatically mapped based on model domain):Heliosphere.InnerContacts :Ian.Richardson, ModelDeveloperAcknowledgement/Institution :Relevant Links :SRAG one-pager description: https://ccmc.gsfc.nasa.gov/static/files/SEPSB/SEP-one-pager_SEPSTER.pdfPublications :Model Access Information :Access URL: https://iswa.gsfc.nasa.gov/iswa_data_tree/model/heliosphere/sep_scoreboard/SEPSTER/Access URL Name: Continuous/RT Run (ISWA data tree) Repository ID: spase://CCMC/Repository/NASA/GSFC/CCMC Availability: online AccessRights: OPEN Format: HTML Encoding: None Access URL: https://sep.ccmc.gsfc.nasa.gov/intensity/ Access URL Name: Continuous/RT Run (SEP Scoreboard Intensity) Repository ID: spase://CCMC/Repository/NASA/GSFC/CCMC Availability: online AccessRights: OPEN Format: HTML Encoding: None Linked to Other Spase Resource(s) (example: another SimulationModel) : |
Curator: Chiu Wiegand | NASA Official: Dr. Masha Kuznetsova | Privacy and Security Notices | Accessibility | CCMC Data Collection Consent Agreement |