The Omni data set represents a thorough description of various characteristics of near-Earth solar wind magnetic field and plasma, which could be used as a basis for that space environment's standard. 7 for the period starting from the end of year 1999 to 20 July 2020.
Omniweb nasa 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. OMNIWeb allows users to generate plots vs. We will also present some of the many capabilities of the OMNIweb interface () that provides access to the entire OMNI data set. This presentation will describe the OMNI data set and highlight its wide use in the space science community. Extensive quality control and cross- comparisons of overlapping data sets were made in creating OMNI. 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. 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. The present study focuses on daily averages of simple, untransformed values obtained from a freely available online source (). OMNI is widely used in the heliospheric community as is documented by the large number of acknowledgements in scientific papers. SPDF maintains the SSCweb database of spacecraft orbits, the OMNIweb cross-normalized database, and the Common Data Format (CDF) self-describing science. 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.
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