NIM/SKYRAD/M1 - Unknown problem with PIR1

Spikes in Shaded 1 occur frequently during this time period, resulting in differences b/t 
shaded1 and shaded2 exceeding 20W/m2.  Instrument connections were checked and a spare 
PIR instrument was tried in the place of PIR1 (shaded1).  After returning the original PIR1 
to its original location data again looked good and very close to PIR2.  Problem appears 
resolved but exact cure is unknown.

Fortunately the downwelling longwave hemispheric irradiance for this station has 

redundant instruments, PIR1 (aka shaded1) and PIR2 (aka shaded2).  Disregard PIR1 data and 
use only PIR2 during this time range.

• inst_down_long_hemisp_shaded1_tp
• inst_down_long_hemisp_shaded2_tp
• inst_down_long_shaded2_case_resist
• inst_down_long_shaded2_dome_resist
• inst_down_long_shaded1_case_resist
• inst_down_long_shaded1_dome_resist

• down_long_hemisp_shaded2_max
• down_long_hemisp_shaded2_std
• down_long_hemisp_shaded1_min
• down_long_hemisp_shaded2
• down_long_hemisp_shaded1
• inst_down_long_shaded1_dome_temp
• inst_down_long_hemisp_shaded1_tp
• inst_down_long_hemisp_shaded2_tp
• inst_down_long_shaded2_case_temp
• inst_down_long_shaded1_case_temp
• down_long_hemisp_shaded2_min
• inst_down_long_shaded2_dome_temp
• down_long_hemisp_shaded1_std
• down_long_hemisp_shaded1_max

• Raw data stream - documentation not supported