SGP/SIRS/E19 - Intermittent bad data

From 9/21 to 10/10 0015GMT the DSH (down_short_hemisp) values were intermittently missing 
while simultaneously ULH (up_long_hemisp) and DLHS (down_long_hemisp_shaded) values were 
much lower than possible values.  This problem was attributed to an unidentified mux 
related problem. Although the problem did not recur after 10/10, the mux was replaced on 11/03.

The problem was intermittent, occurring for significant parts of each day. The QC flags 
appear to adequately flag bad data.

Use the QC flags to filter for good data.

• inst_up_long_case_resist
• inst_global
• inst_down_long_shaded_dome_resist
• inst_down_long_hemisp_shaded_tp
• inst_up_long_dome_resist
• inst_up_long_hemisp_tp
• inst_down_long_shaded_case_resist

• down_short_hemisp_min
• down_long_hemisp_shaded
• inst_down_long_shaded_case_temp
• inst_down_long_shaded_dome_temp
• down_long_hemisp_shaded_std
• down_long_hemisp_shaded_max
• inst_up_long_dome_temp
• down_long_netir
• down_long_hemisp_shaded_min
• up_long_hemisp_min
• up_long_netir
• up_long_hemisp
• up_long_hemisp_std
• up_long_hemisp_max
• inst_up_long_case_temp
• down_short_hemisp_max
• down_short_hemisp
• down_short_hemisp_std