SGP/IRT/C1 - 10m IRT ground surface temperature

The 10m IRT was measuring lower ground surface temperature than the 25m IRT. The lens was 
cleaned on 12/19/2012 and replaced on 2/8/2013 but the difference in temperature appears 
to be due to the seasonal difference in surface cover - tall grass vesus bare soil.

• 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)