A1D4.1

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Lead Beneficiary: DTU

Beneficiaries involved: Hvar, MTA-KFKI-RMKI, UOulu, DTU, IEEA, NOVELTIS, LPI, ROB. In addition there has been cross collaboration with other work packages, in particular WP3 and WP2, with respect to both event selection and compilation of the catalogue.

Due Date: 12 months


Goal

The goal is to create a catalogue of a limited of number of events including both data and modelling, covering the whole chain of events from the sun, through heliospheric propagation and solar wind magnetosphere interaction to the ionosphere. The main objectives are

  • to initiate cross collaboration in between SOTERIA partners, and with other interested scientists
  • to provide the SOTERIA partners with a working tool for support of the collaborative studies


Progress so far

A list of 8 events has been selected from careful considerations of data-availability and scientific interest. The selection was the result of an election procedure where all interested SOTERIA partners participated. The list so far contains 7 CME events and one period of very pronounced high speed stream activity. Two data collection products have been created for the selected events.

  • A secure ftp-server has been set-up for collecting the event data in digital form.
  • A catalogue in the form of a pdf with overview plots and imbedded links to all the relevant data. The catalogue is made publically available at the SOTERIA on-line document repository.

FTP-server: A secure ftp server has been setup (ftp://uhuru.spacecenter.dk) with access for all SOTERIA partners to upload and download data. Procedures for use of the data, i.e. rules of the road, have been established. A large part of the data at the secure (i.e. not public) ftp-server consist of data collected from the internet from various sources. This means that we do not own the data and therefore cannot act as distributors. However, this is not a problem for possible future users outside of SOTERIA, since the data is available through the internet and we provide the links through the catalogue.

Catalogue: The catalogue (http://www.spaceweather.eu/repository/WP4_Event_Catalogue-1258112965.pdf) contains a short introduction followed by a list of links to relevant data sources and model results. Concerning satellite missions we have also compiled information on operation periods, since this, we believe, is a big help when trying to compile data from separate sources. For each event we have made several plots that will be helpful when comparing different causes and effects:

  • Overview plots (time-series) of key parameters (Dst, Kp, solar wind parameters, SEPs, UV etc)
  • Zoom-ins on the actual storm event on Earth for various data provided by the different institutes..
  • Modelling results when available, in particular on WP4 focus parameters such as for example L1 arrival and magnetopause distance.

The catalogue has the form of a pdf with imbedded links to all the relevant data (you can click on links in the pdf). Concerning the modelling, access to state of the art models has been facilitated for the SOTERIA partners through an agreement with CCMC (Community Coordinated Modelling Center) at NASA. A SOTERIA page has been established at the CCMC containing links to all SOTERIA-CCMC model results. All beneficiaries contributed to the selection of the events, and have participated in the discussions of the form and content of the catalogue. Particularly, very useful discussions and work on the catalogue were made during the event workshop in September in HVAR.


Individual participation and further specific contributions :

DTU: T. Falkenberg, S. Vennerstrom, N. Olsen

DTU was leading the activity, setting up and maintaining the ftp-server, writing the catalogue and collecting contributions to the catalogue from individual participants. The following specific contributions were made:

  • Plots of the magnetic indices (Kp ASY-H SYM-H Dst AE) and of the Auroral Boundary index AB based on DMSP data
  • Plots of solar wind data (velocity, density and magnetic field) were generated based on data from the ACE and WIND satellites
  • Plots of electron and ion particle data from the GOES satellites
  • Collection of PHTX plots and info on the solar origins from the SOHO/LASCO catalogue
  • Plots from the ENLIL and BATS-R-US models
  • Easily accessible ASCII files, so called “orbit-files” with the magnetic data for the Oersted satellite for the events were Oersted were operating. The files also contain model estimates of the magnetic field contribution due to the Earth internal magnetic field.


LPI : V. Slemzin

  • Provided info on the solar origins


UNIGRAZ: A. Veronig

  • Provided coronal hole data and plot based on GOES SXI
  • Provided info on the solar origins


MTA-KFKI: K. Kecskemety, M. Tatrallyay

  • Acquired data and generated plots from the SOHO COSTEP and STEREO IMPACT/SEPT energetic particle data
  • Provided calculation of the magnetopause standoff distance based on an empirical model


HVAR: Bojan Vrsnak, Tomislav Zic, Jasa Calogovic

  • Provided data from the analytical drag-based heliospheric propagation model (for details see A1D4.2)
  • Collected data and generated plots from the Neutron monitors


NOVELTIS: F. Crespon

  • Provided TEC maps and an analysis of TEC enhancements at high latitudes over Europe.

TEC maps are computed by using GPS data of the EUREF (European Reference Frame) network. Ionosphere mapping from GPS data is a well known technique using the dispersive effect of electrons on the electromagnetic wave propagation to estimate the integrated electron density along GPS receiver-satellite line of sight. Then LMS (Least Mean Square) mathematical method allow to resolve instrumental biases and to map the TEC (Total Electron Content) on a regular grid. This data processing was achieved for each selected events for time period from one day before the solar eruption to several days after the induced geomagnetic storm. For each selected events, the dynamic of the ionosphere present specific features a few days after the solar eruption (flare, CME). We focused our interest on TEC enhancements at high latitude and computed the mean TEC above 60° of latitude producing “averaged TEC” time series.


IEEA: Y. Beniguel

  • Collected data and generated plots for the ionospheric scintillations


UOulu: K. Mursula

  • Generated data and plot for the Dcx index
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