ID: IMB-007
Date: January 11, 2016
Time: 17:10z
Position: 77.37471 N 69.03684 W

Top sensor (1): 81.5 cm above snow

air/snow interface sensor: no. 42
snow/ice interface sensor: no. 42 (no snow by the string!)

snow thickness = 1cm
ice thickness = 69 cm

There was a freeboard of 6.5 cm - I filled that with fresh water after water in hole was frozen.