Time-of-day/time-of-year response functions of planetary geomagnetic indicesMike Lockwood, Aude Chambodut, Ivan D. Finch, Luke A. Barnard, Mathew J. Owens and Carl HainesJ. Space Weather Space Clim., 9 (2019) A20DOI: https://doi.org/10.1051/swsc/2019017