SGP/SIRS/E6 - Incorrect upwelling longwave hemisp

Beginning 6/19 ~1200 GMT, the upwelling longwave hemispheric data (up_long_hemisp) became 
erratic and spiked to extreme values.  Site ops found a broken wire on the multiplexer.  
Repairs were completed on 7/7/2010 ~1700 GMT and the unit returned to service.

• up_long_hemisp_std
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)

• inst_up_long_hemisp_tp
• inst_up_long_case_resist
• inst_up_short_hemisp
• inst_up_long_dome_resist

SGP/SIRS/E7 - NIP connector failure

After instrument replacement 8/5/2010 approx 1700GMT the short_direct_normal values became 
intermittent due to a failed NIP connector. Ops repaired the connector on 8/10 
rectifying the problem.

The short_direct_normal (NIP instrument) data are not recoverable during this period. 
Although there will be greater uncertainty the short_direct_normal can be reconstructed from 
the global and diffuse measurements for each minute of 
data using the following relationship:
down_short_hemisp = short_direct_normal*cos(zenith angle) + down_short_diffuse.

• inst_direct_normal

• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)

SGP/SIRS/E6 - Multiplexer problem

Beginning on 8/13, the MUX had unknown problems that affected the upwelling 
PIR(up_long_hemisp)and downwelling PIR (down_long_hemisp_shaded) and the downwelling 
shortwave(down_short_hemisp). MUX replaced 8/31 at approximately 1600 CST. Problem resolved when MUX 
replaced.

• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• down_short_hemisp_std
• inst_down_long_shaded_dome_temp
• inst_down_long_shaded_case_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• inst_up_long_dome_temp
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• up_long_hemisp_std
• inst_up_long_case_temp
• down_long_hemisp_shaded_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

• inst_up_long_case_resist
• inst_up_long_dome_resist
• inst_down_long_shaded_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_up_long_hemisp_tp
• inst_down_long_shaded_case_resist
• inst_global