@misc{King_Papitashvili_2020, title={OMNI 27-Day Data Set}, url={https://hpde.io/NASA/NumericalData/OMNI/P27D}, DOI={10.48322/NMH3-JF75}, abstractNote={27-day averaged, multi-source, near-Earth solar wind magnetic field, plasma and energetic proton flux data, plus AE, AU, AL, Kp, ap, and Dst geomagnetic indices, Polar Cap (Thule) index, F10.7 index, and Rz (sunspot number). Also available at 1-hour and 1-day resolution.}, publisher={NASA Space Physics Data Facility}, author={King, Joseph H. and Papitashvili, Natalia E.}, year={2020} }