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Table 2

Measured parameters and method used for the measurement.

Measured parameters Units Methods

Before perihelion After perihelion
Length m Extracted from GH on ArcGIS Calculated from pixel scale
Width m Extracted from GH on ArcGIS Calculated from pixel scale
Height m Calculated from topograpgic profile Estimated from growth ratio
Area m2 Calculated from pixel scale
Volume structure m3 Estimated from a triangular prisme shape
Volume boulder m3 Estimated from a sphere geometry

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