Magnetic resonance sounding dataset of a hard-rock headwater catchment for assessing the vertical distribution of water contents in the subsurface [Data paper] Lesparre, N. Girard, J. F. Jeannot, B. Weill, S. Dumont, M. /Boucher, Marie Viville, D. Pierret, M. C. /Legchenko, Anatoli Delay, F. Hydrogeophysics Magnetic resonance sounding Headwater catchment Hard-rock aquifer Conditioning parameters of a hydrological model Magnetic Resonance Sounding (MRS) measurements are acquired at 16 stations in the Strengbach headwater catchment (Vosges Mountains - France). These data, rendering the vertical distribution of water contents in the subsurface, are used to show their potential in conditioning a hydrological model of the catchment, as described in the article "Magnetic resonance sounding measurements as posterior information to condition hydrological model parameters: Application to a hard-rock headwater catchment" - Journal of Hydrology (2020). Acquisition protocols follow a free induction decay scheme. Data are filtered by applying a band-pass filter at the Larmor frequency. A filter removing the 50 Hz noise is also applied with the exception of data at a Larmor frequency close to the 50 Hz harmonic. The signal envelopes are then fitted by a decaying exponential function over time to estimate the median characteristic relaxation time of each MRS sounding. 2020 text https://www.documentation.ird.fr/hor/fdi:010079736 fdi:010079736 Lesparre N., Girard J. F., Jeannot B., Weill S., Dumont M., Boucher Marie, Viville D., Pierret M. C., Legchenko Anatoli, Delay F.. Magnetic resonance sounding dataset of a hard-rock headwater catchment for assessing the vertical distribution of water contents in the subsurface [Data paper]. 2020, 31, 105708 [16 ] EN FRANCE