SGP/SIRS/E12 - Shadowband misalignment

The E12 tracker had failed from 7/20 to 8/2. The tracker was replaced and returned to 
service on 8/2.  However, the tracker was not aligned correctly until 10/18.  

Data for short_direct_normal (NIP instrument) and down_short_diffuse (8-48 instrument) are 
bad and not recoverable during this entire time range.

• inst_direct_normal
• inst_diffuse

• short_direct_normal
• down_short_diffuse_hemisp
• short_direct_normal_min
• down_short_diffuse_hemisp_max
• down_short_diffuse_hemisp_std
• down_short_diffuse_hemisp_min
• short_direct_normal_max
• short_direct_normal_std