TWP/MWRRET/C3 - Input sonde data occasionally missing

This DQR is entered a precaution since the problem listed below is hard to detect, but 
likely impacts very few data files.  

The sonde data from Darwin, twpsondewnpnC3.b1, is occasionally delayed or the files arrive 
to the DMF out of order.  In some cases the twpmwrret1liljclouC3.c1 and 
twpmwrret1liljclouC3.s1 data are processed before all of the sonde data are available.  It appears that 
this problem actually impacts very few data files, but it is not always clear when this 
problem occurs.  In addition, a 5-day delay was added to the twpmwrret1liljclouC3.c1 
processing on 10/09/12 to lessen the chance of this problem occurring in the future.  

The sonde data are used to calculate the physical retrievals of liquid water path and 
precipitable water vapor, so this problem could potentially impact the best-estimate values 
as well.  This problem only impacts near real-time processing for MWRRET, so the 
twpmwrret1liljclouC3.c2 and twpmwrret1liljclouC3.s2 products are not impacted.

null

• Liquid water path best-estimate value(be_lwp)
• Root mean square difference between the computed and observed brightness
  temperatures for the last iteration(phys_rms)
• 1-sigma uncertainty in precipitable water vapor retrieved using a
  physical/iterative approach(phys_pwv_uncertainty)
• Convergence value for the physical retrieval(phys_converge)
• Precipitable water vapor retrieved using a physical/iterative approach(phys_pwv)
• Number of iterations needed by the physical retrieval for convergence(phys_niter)
• Precipitable water vapor best-estimate value(be_pwv)
• 1-sigma uncertainty in cloud liquid water path retrieved using a
  physical/iterative approach(phys_lwp_uncertainty)
• Cloud liquid water path retrieved using a physical/iterative approach(phys_lwp)

• Liquid water path best-estimate value(be_lwp)
• Precipitable water vapor best-estimate value(be_pwv)