TWP/GNDRAD/C1 - PIR and IRT: surface temperature comparison

The GNDRAD continues to look nominally OK. The daily average irradiances
are about what is expected. The comparison of the downward facing IRT and
the calculated brightness temperature from the downward facing PIR show
agreement within and average of about 0.5O C. About 19981206, the daily
average agreement suddenly seems to have gotten better. We should note
to monitor this in the next data package.

• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• Instantaneous PIR1 uncorrected irradiance(pir1_voltage)
• Instantaneous PIR1 case thermistor(pir1_case_therm)

• PIR1 minimum(pir1_min)
• IRT1 maximum(irt1_max)
• IRT1 mean(irt1_mean)
• PIR1 unshaded maximum(pir1_max)
• IRT1 minimum(irt1_min)
• PIR1 mean(pir1_mean)
• PIR1 unshaded standard deviation(pir1_sd)
• IRT1 standard deviation(irt1_sd)

• IRT1 mean(irt1_mean)
• IRT1 minimum(irt1_min)
• IRT1 standard deviation(irt1_sd)
• PIR1 mean(pir1_mean)
• PIR1 minimum(pir1_min)
• IRT1 maximum(irt1_max)
• PIR1 unshaded maximum(pir1_max)
• PIR1 unshaded standard deviation(pir1_sd)