Heliophysics Event Knowledgebase for the Solar Dynamics Observatory (SDO) and Beyond

Hurlburt, N. E.; Cheung, Mark C. M.; Schrijver, Carolus J.; Chang, Lin‐Ching; Freeland, S. L.; Green, S.; Heck, C.; Jaffey, A.; Kobashi, A.; Schiff, Debra; Serafin, J.; Seguin, R.; Slater, G. L.; Somani, A.; Timmons, R.

doi:10.1007/s11207-010-9624-2

Cited by 122 publications

(76 citation statements)

References 14 publications

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“…from the twin Solar TErrestrial RElations Observatory (STEREO) spacecraft (Kaiser et al 2008); -real-time generation and display of difference movies; -PFSS magnetic field extrapolation models using synoptic magnetograms from the Global Oscillation Network Group (GONG); -timelines of 1D and 2D data, e.g. disk-integrated X-ray fluxes and radio spectrograms; -integrating solar event data from the Heliophysics Event Knowledgebase (HEK, Hurlburt et al 2012) and curating it into a Space Weather Event Knowledgebase (SWEK, described in this paper); -various 2D projections (orthographic, latitudinal, polar, log-polar); -a split-screen view to display multiple images side by side; -a virtual camera model that enables the user to set the vantage point to the location of a spacecraft or celestial body at a given time, using an ephemeris server.…”

Section: Introductionmentioning

confidence: 99%

JHelioviewer

Müller

Nicula

Felix

et al. 2017

A&A

146

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Context. Solar observatories are providing the world-wide community with a wealth of data, covering wide time ranges (e.g. Solar and Heliospheric Observatory, SOHO), multiple viewpoints (Solar TErrestrial RElations Observatory, STEREO), and returning large amounts of data (Solar Dynamics Observatory, SDO). In particular, the large volume of SDO data presents challenges; the data are available only from a few repositories, and full-disk, full-cadence data for reasonable durations of scientific interest are difficult to download, due to their size and the download rates available to most users. From a scientist's perspective this poses three problems: accessing, browsing, and finding interesting data as efficiently as possible. Aims. To address these challenges, we have developed JHelioviewer, a visualisation tool for solar data based on the JPEG 2000 compression standard and part of the open source ESA/NASA Helioviewer Project. Since the first release of JHelioviewer in 2009, the scientific functionality of the software has been extended significantly, and the objective of this paper is to highlight these improvements. Methods. The JPEG 2000 standard offers useful new features that facilitate the dissemination and analysis of high-resolution image data and offers a solution to the challenge of efficiently browsing petabyte-scale image archives. The JHelioviewer software is open source, platform independent, and extendable via a plug-in architecture. Results. With JHelioviewer, users can visualise the Sun for any time period between September 1991 and today; they can perform basic image processing in real time, track features on the Sun, and interactively overlay magnetic field extrapolations. The software integrates solar event data and a timeline display. Once an interesting event has been identified, science quality data can be accessed for in-depth analysis. As a first step towards supporting science planning of the upcoming Solar Orbiter mission, JHelioviewer offers a virtual camera model that enables users to set the vantage point to the location of a spacecraft or celestial body at any given time.

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Section: Introductionmentioning

confidence: 99%

JHelioviewer

Müller

Nicula

Felix

et al. 2017

A&A

146

View full text Add to dashboard Cite

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“…We have implemented an interface to automatically submit SHARP parameters, as well as HARP geometry and location keywords, to the Heliophysics Events Knowledgebase (HEK: Hurlburt et al, 2012). The HEK is a web-based tool designed to aid researchers in finding features and events of interest.…”

Section: Tablementioning

confidence: 99%

The Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Pipeline: SHARPs – Space-Weather HMI Active Region Patches

et al. 2014

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A new data product from the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO) called Space-weather HMI Active Region Patches (SHARPs) is now available. SDO/HMI is the first space-based instrument to map the fulldisk photospheric vector magnetic field with high cadence and continuity. The SHARP data series provide maps in patches that encompass automatically tracked magnetic concentrations for their entire lifetime; map quantities include the photospheric vector magnetic field and its uncertainty, along with Doppler velocity, continuum intensity, and line-of-sight magnetic field. Furthermore, keywords in the SHARP data series provide several parameters that concisely characterize the magnetic-field distribution and its deviation from a potential-field configuration. These indices may be useful for active-region event forecasting and for identifying regions of interest. The indices are calculated per patch and are available on a twelveminute cadence. Quick-look data are available within approximately three hours of observation; definitive science products are produced approximately five weeks later.

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“…We excluded FCs by analysis of magnetic field distribution in the dimmed regions, which is different in CHs and FCs (Scholl & Habbal, 2008). To separate the CHs from FCs, we consider the data on the radial component of the photospheric magnetic field measured by the Helioseismic and Magnetic Imager on SDO (Hurlburt et al, 2012).…”

Section: Prediction Of Solar Wind Phenomena By the He Modelmentioning

confidence: 99%

Influence of coronal mass ejections on parameters of high-speed solar wind: a case study

Shugay

Slemzin

Rodkin

et al. 2018

J. Space Weather Space Clim.

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-We investigate the case of disagreement between predicted and observed in-situ parameters of the recurrent high-speed solar wind streams (HSSs) existing for Carrington rotation (CR) 2118 (December 2011) in comparison with CRs 2117 and 2119. The HSSs originated at the Sun from a recurrent polar coronal hole (CH) expanding to mid-latitudes, and its area in the central part of the solar disk increased with the rotation number. This part of the CH was responsible for the equatorial flank of the HSS directed to the Earth. The time and speed of arrival for this part of the HSS to the Earth were predicted by the hierarchical empirical model based on EUV-imaging and the Wang-Sheeley-Arge ENLIL semi-empirical model. The predicted parameters were compared with those measured in-situ. It was found, that for CR 2117 and CR 2119, the predicted HSS speed values agreed with the measured ones within the typical accuracy of ±100 km s À1 . During CR 2118, the measured speed was on 217 km s À1 less than the value predicted in accordance with the increased area of the CH. We suppose that at CR 2118, the HSS overtook and interacted with complex ejecta formed from three merged coronal mass ejections (CMEs) with a mean speed about 400 km s À1 . According to simulations of the Drag-based model, this complex ejecta might be created by several CMEs starting from the Sun in the period between 25 and 27 December 2011 and arriving to the Earth simultaneously with the HSS. Due to its higher density and magnetic field strength, the complex ejecta became an obstacle

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Heliophysics Event Knowledgebase for the Solar Dynamics Observatory (SDO) and Beyond

Cited by 122 publications

References 14 publications

JHelioviewer

JHelioviewer

The Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Pipeline: SHARPs – Space-Weather HMI Active Region Patches

Influence of coronal mass ejections on parameters of high-speed solar wind: a case study

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