SHB/GNDRAD/C1  - Surface viewed by sensors is disturbed

The surface viewed by the sensors was marred by footprints during this period.  Due to 
moving ice floes, the GNDRAD cables and parts were prepared for an potential emergency move. 
The last confirmed time of undisturbed snow surface marks the start time and end times.

• PSP1 unshaded minimum(psp1_min)
• IRT1 minimum(irt1_min)
• NET minimum(net_min)
• IRT1 standard deviation(irt1_sd)
• NET standard deviation(net_sd)
• PIR1 minimum(pir1_min)
• IRT1 maximum(irt1_max)
• IRT1 mean(irt1_mean)
• PSP1 mean(psp1_mean)
• Net Radiation, Maxima(net_max)
• PIR1 mean(pir1_mean)
• Bit data. See details.(bit_data)
• NET mean(net_mean)
• PIR1 unshaded standard deviation(pir1_sd)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 maximum(psp1_max)
• Raw data filename(filename)
• PIR1 unshaded maximum(pir1_max)