This dataset contains the polarimetric measurements performed for the paper "Experimental study of frost detectability on planetary surfaces using multicolor photometry and polarimetry" (Spadaccia et al., 2023 published on Icarus). The experimental work is aimed at measuring the changes of polarimetric and photomatric signal of a regolith when frost is deposited on top, at different temperatures and different wavelengths (450, 550, 750 nm). The .txt files are divided on regolith simulant (CR or MGS-1) and polarimetric phase angle (5 or 16°). The reflectance is measured at phase angle 50 or 61°. Each .txt file contains the averaged information of 5 experiments for CR at temperature T=-150°C, three experiments for MGS-1 at T=-130°C ("cold") and three experiments with MGS-1 at T=-120°C. The columns in the .txt files contain information on: #time[s] #temperatures[°C] #stdv_temperatures[°C] #Qblue #stdvQblue #Rblue #stdvRblue #Qgreen #stdvQgreen #Rgreen #stdvRgreen #Qred #stdvQred #Rred #stdvRred Where "Q" is the measurement of Q/I, "stdv" means standard deviation of the different experiments, "R" is the reflectance measured with the monochromatic camera, "blue", "green" and "red" are the three wavelengths of the incident light (450, 550, 750 nm).