SHB/SKYRAD/C1 - Intermittent IRT data loss

IRT had intermittent drop outs of data every day in 
this period. Cable between instrument and datalogger
was replaced on 12/16 and the problem disappeared.

• IRT1 minimum(irt1_min)
• IRT1 standard deviation(irt1_sd)
• IRT1 mean(irt1_mean)
• IRT1 maximum(irt1_max)

• (Raw data stream - documentation not supported)

• IRT1 minimum(irt1_min)
• IRT1 maximum(irt1_max)
• IRT1 mean(irt1_mean)
• IRT1 standard deviation(irt1_sd)