C. Zhang. Dataset, (2022)Related to: Diamond magnetometry and gradiometry towards subpicotesla DC field measurement, C. Zhang, F. Shagieva, M. Widmann, M. Kübler, V. Vorobyov, P. Kapitanova, E. Nenasheva, R. Corkill, O. Röhrle, K. Nakamura, H. Sumiya, S. Onoda, J. Isoza, J. Wrachtrup, Physical Review Applied 15.6 (2021): 064075. doi: 10.1103/PhysRevApplied.15.064075.