SGP/SIRS/E34 - Tracker failure

The tracker at failed to wake up on 12/26/2012.  The problem persisted throughout the time 
range specified.  On 1/3/2013 the tracker was power cycled and returned to normal 
operation.  

The tracker malfunction adversely affected the data from the direct normal instrument 
(short_direct_normal). Also affected is the diffuse shaded global data (down_short_diffuse).

Data are not recoverable

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

• inst_direct_normal
• inst_diffuse