SGP/SIRS/E33 - Instrument noise problem

The UIR instrument (up_long_hemisp) had significant noise starting from the commission 
date.  On 8/14/2012 15:59 site ops replaced the UIR which corrected the noise problem. 
However, the UIR calibration coefficient was incorrect until the datalogger program was 
updated on 9/26/2012 1839GMT.  Data before 8/14 is not recoverable. Data after 8/14 will need 
to be reprocessed.
Longwave UIR requires reprocessing from 8/14 to 9/26 using the 20second datastream and 
applying the following k1 coefficient:
serial numbers are correct during this time.
up_long_hemisp (old cal) = 0.2376
up_long_hemisp (corr cal) = 0.2451

• inst_up_short_hemisp
• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_dome_resist

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

SGP/SIRS/E33 - Instrument noise problem

This DQR is an extension of D121004.1, the UIR instrument noise problem.  It deals 
exclusively with the DIR (down_long_hemsip) datastream.  It is filed separately due to the 
difficulty describing the problem in the space provided.

During troublshooting of the UIR (up_long_hemisp) this instrument was swapped with the DIR 
(down_long_hemsip) to help isolate an instrument noise issue.  After this swap it was 
determined that the noise was associated with a defective UIR instrument.

For the first time range specified from 8/14 to 8/17 the DIR data is not recoverable since 
the instrument was faulty (it was the old bad UIR). the instrument was replaced on 8/17.

For the second time range specified from 8/17 to 9/26 the DIR data had an incorrect 
calibration coefficienct applied until the logger program was updated on 9/26/2012 1839GMT. 
This data will require reprocessing. 

Longwave DIR (down_long_hemisp) requires reprocessing from 8/17 to 9/26 using the 20second 
datastream and applying the following k1 coefficient: 
serial number is correct during this time. 
   up_long_hemisp (old cal) = 0.2967
   up_long_hemisp (corr cal) = 0.3085

• inst_down_long_shaded_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_down_long_shaded_case_resist

• down_long_hemisp_shaded_std
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_case_temp
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)