1. Title of Dataset: Dataset on porous spheres sinking through density and rheological transition
Data were collected in Laboratory of Hydrodynamic Micromodels, Institute of Geophysics, Polish Academy of Sciences

2. Folder List: 

Settling_experiments

3. Additional related data collected that was not included in the current data package: 
- Data on rheological properties of solutions stored in the 'Rheological_data' folder
- Data on profiles of density stored in 'Density_profiles' folder

4. Data collected in the folder:
AS36_AS48
AS36_AS48XG08
where AS - artificial seawater (36 and 48 stand for content of salts in g/L), XG - xanthan gum (08 stands for XG content of 0.8 g/L).

5. Additional related data collected that was not included in the current data package: 
Data on rheological properties of solutions stored in Rheological_data folder
	
6. Methodological information:

Polystyrene biopolymer spheres—both porous and non-porous—were observed settling in a two-layer liquid column. In the AS36_AS48 setup, the layers consisted of artificial seawater with differing salt concentrations. 
In the AS36_AS48XG08 setup, the lower layer was additionally enriched with xanthan gum to modify its rheological properties.
Experiments were conducted at 21 ± 0.5 °C. The settling process was recorded using a camera in a backlight configuration. 
The resulting images were processed to extract data on the temporal positions of the sinking particles.

7. Data-specific information:
 
Each sub-folder contains:
several .csv files (equal to the number of all runs in the experimental set) called SolutionName_ParticleType_run_RunParticle.csv, 
where particle type is S_PS (sphere made of polystyrene with diameter equal to 1 mm), S_por (porous spheres with characteristics specified in a separate file).
ParticleType is in the following format:

Files contain data on the position of particle centroid 
in time in four columns: x [pix], z [pix], t[s]
where x - horizontal cooridnate, z - vertical coordinate, t - time instant.