A data set containing proton moments measurements from the Parker Spiral Probe Span-Ion Instrument, specifically for data points where at least 85% of the proton distribution falls within the Instrument Field of View.

The SPAN-I proton moments are from the dataset of Livi et al. (2020). Proton parallel and perpendicular temperatures are computed from the partial moments temperature tensor and magnetic field both in the instrument frame. How the percentage of the proton distribution is estimated to be in the SPAN-I field of view is given in the study by Yogesh et al. (2026). The following data file are posted. dfp_g85_2018.csv dfp_g85_2019.csv dfp_g85_2020.csv dfp_g85_2021.csv dfp_g85_2022.csv dfp_g85_2023.csv dfp_g85_2024.csv dfp_g85_2025.csv The row headers are: EPOCH, 'time in UTC' PQUALITY_FLAG, Quality flag of data given is SPAN-I data set pDENS - Proton Density pVEL_INST_x - Proton velocity (km/s) in instrument frame X component pVEL_INST_y - Proton velocity (km/s) in instrument frame Y component pVEL_INST_z - Proton velocity (km/s) in instrument frame Z component pVEL_RTN_SUN_x - Velocity (km/s) in RTN frame X component pVEL_RTN_SUN_y - Velocity (km/s) in RTN frame Y component pVEL_RTN_SUN_z - Velocity (km/s) in RTN frame Z component pMAGF_INST_x - Magnetic field (nT) in instrument frame X component pMAGF_INST_y - Magnetic field (nT) in instrument frame Y component pMAGF_INST_z - Magnetic field (nT) in instrument frame Z component pSUN_DIST - Distance from sun in km pB_mag - Magnetic field magnitude (nT) pT_par - Proton temperature parallel pT_perp - Proton temperature perpendicular (eV pT, proton - Proton temperatue (eV) pT_aniso - Temperature anisotropy pv_mag - Velocity magnitude (km/s) in solar wind. pv_alf - Alfvenic velocity (km/s) pbeta - Plasma beta (calculated using proton total temperature and proton density) pmach - Alfvenic Mach number pA_FOV - FOV_theta*FOV_phi combined FOV, times 100 is the percent estimate DATE, 'time in UTC' If you need updated versions and alpha data with FOV please contact:- [e-mail]