This dataset contains 1-second geomagnetic vector and scalar data from the magnetometer station Macapa. The data is from 15-Nov-2019 to 07-Dec-2019, from 07-Feb-2020 to 05-Apr-2020, and from 09-Oct-2020 to 21-Nov-2020. The data files follow the IAGA-2002 data format. The IAGA format description is copied from https://www.ncei.noaa.gov/services/world-data-system/v-dat-working-group/iaga-2002-data-exchange-format and from https://www.ncei.noaa.gov/sites/default/files/2022-07/IAGA%202002%20July%202003%20Revision.txt. Both documents were downloaded on 2024-08-11 and are available here as IAGA_2002_file_format_description_2024-08-11.pdf.
The data themselves are described in Mendel Martins et al. (2024).