This file contains the 1-minute resolution dataset (“labeled_sunside_data_3labels.csv”) for Toy-Edens et al.’s Automated Classification of MESSENGER Plasma Observations via Unsupervised Transfer Learning. The 1-minute resolution file contains the rolled up 1-minute epoch, features that go into clustering and post-cleaning methods, spacecraft positions (in MSO), total magnetic field, raw and cleaned clustering labels, and raw and cleaned transition name. We ask that if you use any parts of the dataset that you cite Toy-Edens et al.’s Automated Classification of MESSENGER Plasma Observations via Unsupervised Transfer Learning (DOI: 10.3389/fspas.2025.1608091). This work was supported by NASA grants 80NSSC19K0789 and 80NSSC22K0993. The following tables detail the contents of the described files: labeled_sunside_data_3labels.csv description Column Name Description Epoch Epoch in datetime (YYYY-MM-DD HH:MM:SS) x_mso x position of the spacecraft in MSO [km] y_mso y position of the spacecraft in MSO [km] z_mso z position of the spacecraft in MSO [km] btot_mso Total magnetic field [nT] norm_Btot Magnitude of the total magnetic field normalized to 150nT. See paper for more information ratio_max_width Ratio of the width of the most prominent ion spectra peak (in number of energy channels) to max number of energy channels. See paper for more information ratio_high_low Ratio of the mean of the log intensity of high energies in the ion spectra to the mean of the log intensity of low energies in the ion spectra. See paper for more information high_intensity Boolean if there is a peak with a higher minimum intensity threshold. See paper for more information spectra_counts A ratio of spectra bins with non-zero counts to all possible spectra bins (i.e. way to determine if too much missing spectra data). See paper for more information raw_named_label Raw cluster assigned plasma region label (allowed values: magnetosheath, magnetosphere, solar wind) intermediate_named_label Cleaned cluster assigned plasma region label with only relabeling rules applied. See paper for more information named_label Cleaned cluster assigned plasma region label with relabeling rules and post-processing applied (use these unless have a specific reason to use raw labels). See paper for more information raw_transition_name Raw transition names (e.g. bow shock, magnetopause) based on "raw_named_label" cluster labels. See paper for more information transition_name Cleaned transition names (e.g. bow shock, magnetopause) after removing likely transient transitions based on "named_label" cluster labels. See paper for more information