#OMNIWEB NASA DST INDEX DOWNLOAD#
time, to create scatter plots of any two OMNI parameters, to filter with user-specified parameter range criteria, to list and download OMNI parameters, to generate distributions of OMNI parameter values, and to browse and retrieve a static (but periodically updated) daily-resolution IMF polarity plot covering the entire OMNI time span. These models are evaluated with metrics such as the root-mean-square error (RMSE) and Pearson correlation coefficient. To find all of the public data and documents archived by the SPDF, see the SPDF archive. OMNIWeb allows users to generate plots vs. To quantify the intensity of the ring current we use the Dst index downloaded from NASA GSFC's OmniWeb server. We will also present some of the many capabilities of the OMNIweb interface () that provides access to the entire OMNI data set. At a given time, the Dst index is the average of variation over all longitudes the reference level is set so that Dst is statistically zero on. It is computed from the H-components at approximately four near-equatorial stations at hourly intervals. This presentation will describe the OMNI data set and highlight its wide use in the space science community. A measure of variation in the geomagnetic field due to the equatorial ring current. An index of -50 or deeper indicates a storm-level disturbance, and an index of -200 or deeper is associated with middle-latitude auroras.
Solar wind data and geomagnetic indexes are available online from NASA OMNIWeb. (THEMIS Saved Examples) + Coordinate Calculator. and the decrease in the Dst index during the storm main phase. Extensive quality control and cross- comparisons of overlapping data sets were made in creating OMNI. At a given time, the Dst index is the average of variation over all longitudes the reference level is set so that Dst is statistically zero on internationally designated quiet days. The trace query identifies periods when one or more spacecraft are on the same magnetic flux tube of force, or periods when one or more spacecraft occupy a field line which traces down to a specified ground station. The data from ISEE-3, Wind, and ACE were time-shifted because they are about an hour upstream of the Earth's magnetosphere. Spacecraft data used for compiling the OMNI solar wind reference include IMP-8, ACE, Wind, ISEE-3, and Geotail. (Space Physics Data Facility) OMNIWeb interface (). OMNI provides the IMF (magnitude and vector), flow velocity (magnitude and vector), flow pressure, proton density, alpha particle to proton density ratio, and several additional parameters including sunspot and geomagnetic indices and energetic proton fluxes from IMP and GOES. measures associated with geomagnetic activity, the DST index refers to. OMNI is widely used in the heliospheric community as is documented by the large number of acknowledgements in scientific papers. These include solar wind magnetic field and plasma data from IMP 8, ISEE 3, WIND, etc., magnetospheric data from DE 1, ISEE 1 and 2, POLAR, GEOTAIL, etc., and ionospheric and atmospheric data from AE-C, AE-D, and. SOHO is a project of international cooperation between ESA and NASA. NSSDC provides network access to a great deal of recent and older spacecraft data with which space weather algorithms may be tested. Angle įlow Pressure Įlectric field * 10**-3.OMNI is an hourly resolution multi-source data set of near-Earth solar wind's magnetic field and plasma parameters spanning the period from November 1963 (IMP 1 launch) to today, and it is being updated regularly with new data. 1998-2005 based on OMNIweb data with Dst index threshold selection capability. King, NASA/NSSDC, who supplied OMNI and COHO data Data available from to Time intervalįield Magnitude Average |B|, This page was created with the kind help of Dr.
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