During the Polarstern cruise PS144 from August 2024 to October 2024 in the central Arctic Ocean snowpit measurements were performed during10 ice stations. A density cutter of fixed volume (100 cm³) and weight was used to measure the density profile of the snow/surface scattering layer (SSL). The height of the sampled volume was recorded with a ruler. 0 cm is the snow-ice interface, negative values denote the surface scattering layer. The combined weight of the density cutter and the snow inside it was measured with a digital scale. The resulting density is the weight of snow/volume. Snow or SSL was collected in plastic containers and used for subsequent salinity and conductivity measurements onboard (using a handheld Greisinger G1410 salinometer). In addition, the grain size was determined visually with a magnifying glass and a screen with a mm-grid and is given as average minimum and maximum size. Hardness using the hand hardness scale and grain types according to the stratification identified by the observer in the snowpit are described in the "Comment" column (the hardness in addition in the Hardness of snow column) . All measurements were done within the vicinity of the footprint of the onboard microwave radiometers installed for the VAMPIRE project https://doi.pangaea.de/10.1594/PANGAEA.990496) (that is, in about 25 m distance to the port bow of Polarstern), further refined in the "Location" column. For more information about these measurements the user is referred to Chapter 6.4 of the cruise report (https://doi.org/10.57738/BZPM_0794_2025).