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The study of thermal properties of frozen salt solutions representative ofice layers in Jovian moons is crucial to support the JUpiter ICy moons Explorer(JUICE) (ESA) and Europa Clipper (NASA) missions, which will be launched in theupcoming years to make detailed observations of the giant gaseous planetJupiter and three of its largest moons (Ganymede, Europa, and Callisto), due tothe scarcity of experimental measurements. Therefore, we have conducted a setof experiments to measure and study the thermal conductivity of macroscopicfrozen salt solutions of particular interest in these regions, including sodiumchloride (NaCl), magnesium sulphate (MgSO$_4$), sodium sulphate (Na$_2$SO$_4$),and magnesium chloride (MgCl$_2$). Measurements were performed at atmosphericpressure and temperatures from 0 to -70$^{\circ}$C in a climatic chamber.Temperature and calorimetry were measured during the course of the experiments.An interesting side effect of these measurements is that they served to spotphase changes in the frozen salt solutions, even for very low saltconcentrations. A small sample of the liquid salt-water solution was set asidefor the calorimetry measurements. These experiments and the measurements ofthermal conductivity and calorimetry will be valuable to constrain the chemicalcomposition, physical state, and temperature of the icy crusts of Ganymede,Europa, and Callisto.

Thermal Conductivity measurements of macroscopic frozen Salt Ice analogs of Jovian Icy moons in support of the planned JUICE mission