SGP/SIRS/E21 - Bird Poop Contamination

Downwelling shortwave values were erratic during the day on 10/18 and in very poor 
agreement at times with downwelling shortwave values calculated from direct and diffuse 
measurements. Bi-weekly preventative maintenace records indicate bird poop was cleaned from the 
downwelling shortwave instrument on 10/29 at 16:30.  Review of maintenance records and 
instrument data indicate no bird contamination since 10/29.

Turkey vultures are the usual suspects in data quality problems at this facility. The 
RBD(rotating bird deterrent) had failed the week of 10/13 and is awaiting parts.  However, 
beginning in late October the birds had left the site.

Do not use - Data known to be incorrect

• inst_global

• Raw data stream - documentation not supported

• down_short_hemisp
• down_short_hemisp_std
• down_short_hemisp_max
• down_short_hemisp_min