TWP/SKYRAD/C3 - Tracker inoperative

The tracker at Darwin failed 01/23.  The tracker was power cycled on 01/27 and it returned 
to normal operation.

The affected data streams are short_direct_normal (NIP) and down_short_diffuse_hemisp 
(8-48).  

The down_short_hemisp are not affected.  

The down_long_hemisp1 and 2 (PIR1 and PIR2) should not be affected but direct sun can 
affect individual instrument performance.

• down_long_hemisp2_min
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• down_long_hemisp2_max
• down_long_hemisp1_max
• down_long_hemisp1_min
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• short_direct_normal_std
• inst_down_long_hemisp1_tp
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• inst_down_long_hemisp2_case_temp
• down_long_hemisp2_std
• inst_down_long_hemisp2_dome_temp
• inst_down_long_hemisp1_case_temp
• down_long_hemisp1_std
• inst_down_long_hemisp2_tp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• inst_down_long_hemisp1_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)

• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp2_tp
• inst_direct_normal
• inst_diffuse
• inst_down_long_hemisp2_dome_resist

TWP/SKYRAD/C3 - IRT power supply

The IRT external DC power supply had shut down for an unknown reason. The problem was 
corrected by restarting the power supply.

• sky_ir_temp_min
• sky_ir_temp_max
• Temperature, Sky Infra-Red(sky_ir_temp)
• sky_ir_temp_std