a
b
c
d
Fig. 3. Contours of glaciers No. 143 and No. 144: a − according to the topographic map, b − according to the Landsat 7 ETM+ sensor image of August 31, 2010, c − according to the Landsat 8 OLI TIRS sensor image of September 19, 2017, d − according to the Landsat 8 OLI TIRS sensor image of September 11, 2020.
