SGP/SIRS/E21 - Reprocess: TimeCheck Error

The EF data system lost communication with the GPS likely starting on or around June 7th, 
the max time set For E21 was -5.04 sec. Since then, it has been increasing steadily:

Jun 8  Offset:    -267.449039
Jun 9  Offset:    -541.038624
Jun 10 Offset:    -814.469141
Jun 11 Offset:    -1076.862114
Jun 12 Offset:    -1350.330223
Jun 13 Offset:    -1623.639335
Jun 14 Offset:    -1897.047754
Jun 15 Offset:    -2170.552312
Jun 16 Offset:    -2422.130746
Jun 17 Offset:    -2684.607495
Jun 18 - Jun 22 (unknown)
Jun 23 Offset:    -4204.730579

If the E21 system clock drifts the E21 Datalogger clocks will be set to the same incorrect 
time. SIRS irradiance data will be correct but the corresponding time stamp cannot be 
accurately known or simply corrected for.

Data time stamp cannot be considered accurate and hence users are advised to 

disregard this data.
PRB note: We may be able to recommend a correction based on assumption of linear drift between site data system time sets.  This may not be worth the effort since so much data is missing in the later date range (6/24 to 7/14) due to data collection problems and time drift is unknown from Jun 18 to Jun 22.  
Data time stamp cannot be considered accurate and hence users are advised to 
disr
egard this data.
PRB note: We may be able to recommend a correction based on assumption of 
linear drift between site data system time sets.  This may not be worth the effort since 
so much data is missing in the later date range (6/24 to 7/14) due to data collection problems and time drift is unknown from Jun 18 to Jun 22.

• inst_down_long_shaded_case_resist
• inst_direct_normal
• inst_down_long_shaded_dome_resist
• inst_global
• base_time
• time_offset
• lon
• inst_diffuse
• inst_down_long_hemisp_shaded_tp
• inst_up_long_dome_resist
• inst_up_long_hemisp_tp
• inst_up_long_case_resist
• alt
• inst_up_short_hemisp
• lat

• Raw data stream - documentation not supported

• up_short_hemisp_std
• time_offset
• down_short_hemisp_std
• up_long_hemisp
• vBatt
• short_direct_normal_std
• down_short_diffuse_hemisp_min
• down_short_diffuse_hemisp_max
• up_short_hemisp
• down_long_hemisp_shaded_max
• short_direct_normal_min
• up_long_hemisp_std
• up_short_hemisp_max
• up_long_hemisp_min
• down_short_hemisp
• lon
• down_short_hemisp_max
• up_short_hemisp_min
• up_long_netir
• inst_down_long_shaded_dome_temp
• down_long_hemisp_shaded_min
• short_direct_normal_max
• down_long_hemisp_shaded
• inst_up_long_case_temp
• short_direct_normal
• down_short_diffuse_hemisp
• alt
• down_long_hemisp_shaded_std
• down_short_diffuse_hemisp_std
• lat
• up_long_hemisp_max
• down_long_netir
• inst_down_long_shaded_case_temp
• base_time
• down_short_hemisp_min
• inst_up_long_dome_temp