Dst index
The Dst index is an index of magnetic activity derived from a network of near-equatorial geomagnetic observatories that measures the intensity of the globally symmetrical equatorial electrojet (the "ring current"). Dst is maintained at WDC Kyoto and NGDC.
Provision of Dst index data for AFFECTS
NRT data and data of the last month required for different FSI processing modules are internally provided in the FSI. Automatic processes are established, downloading the corresponding files (see below) from the website and ftp servers and storing them on the FSI Pickup Point. The Pickup Point inhabits the input data for the FSI. All data stored there is then provided to the FSI processing modules.
For the processor development and scientific purpose, the geomagnetic indices can be directly downloaded from the websites and ftp servers given below.
Dst Observations in near real time
Dst Forecast
Forecast of Dst is provided in the course of the AFFECTS project by SRI NASU-NSAU.
Product description: DSTForecast_INFO.pdf
Dst Archive
http://wdc.kugi.kyoto-u.ac.jp/dst_final/index.html
ftp://ftp.ngdc.noaa.gov/STP/GEOMAGNETIC_DATA/INDICES/DST/
Use of Dst index data in AFFECTS
The data will be primarily used to develop and validate the forecasts proposed in WP4 and WP5. The use of the geomagnetic indices data by the AFFECTS users/beneficiaries is described in the table below.
Description of application | Beneficiary | Data access |
Development of forecast for geomagnetic indices | SRI-NASU-NSAU | online |
Implementation of operational forecast tool for forecasting geomagnetic indices | SRI-NASU-NSAU | FSI |
Preliminary analyses during the development of a perturbation TEC model | DLR | Online |
Implementation of forecast tool for forecasting perturbed TEC | DLR | FSI |
Comparison of Dst, Kp, ap, Ap and UoT magnetometer data (also for items below) with forecasted activity levels based on solar observations, validation of solar wind and CME forecasts | UGOE | Online |
Determination of resulting geomagnetic disturbance levels in response to solar wind parameters measured by ACE, validation of solar wind - magnetosphere coupling functions | UGOE | Online |
Analysis of magnetospheric ionospheric coupling during geomagnetic storms | UGOE | Online |
Analysis of polar electro jet and ring current distributions during geomagnetic storms, with special emphasis on polar electro jet movements to lower latitudes, including dTEC variations | UGOE | Online |
Comparisons of magnetospheric and ionospheric disturbance levels of present and past storms | UGOE | Online |
Integration into space weather mobile phone application (later) | UGOE | Online |
