SGP/IRT/C1 - UPS failing

The IRT data were intermittently bad during this period due to a failing UPS. The problem 
was corrected by replacing the UPS.

• Surface Infra-Red Temperature, Minima(sfc_ir_temp_min)
• Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
• Surface infra-red temperature(sfc_ir_temp)
• Surface Infra-Red Temperature, Maxima(sfc_ir_temp_max)
• Internal voltage(internal_voltage)