NIM/MWRP/M1 - Reprocessed - New retrieval coefficients

Occasionally, the retrieved relative humidity was exceeding 120%. Upon reviewing the data 
it was noticed that the high values were appearing in the highest layers (above 8 km) and 
especially during spring season. Since retrievals at the highest levels are mainly 
affected by the climatology used to constrain the retrievals, we reviewed the statistical 
coefficients that were used to retrieve temperature and humidity. It was discovered that, in 
the training dataset (radiosonde), there were a few outliers (invalid radiosonde 
soundings) that had escaped the screening process and were affecting the computations of the 
retrieval coefficients.

We recomputed the retrieval coefficients with the newly screened set of radiosonde data 
and reprocessed all the previous data at Niamey.  The reprocessed data were archived in 
August 2006.

The new coefficients improve temperature and humidity profiles in two ways. The relative 
humidity will not exceed 120% in the upper layers and the temperature profiles will be in 
better agreement with the sonde in the first 4 km.

Retrieve reprocessed data for use in your analysis.

• Retrieved water vapor density(waterVaporDensity)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• Cloud base height used during retrieval(cloudBaseHeight)
• Derived relative humidity(relativeHumidity)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Interpolated dewpoint temperature(dewpointTemperature)
• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Derived virtual temperature(virtualTemperature)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Retrieved liquid water path(liquidWaterPath)
• Temperature used for calculation(temperature)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Retrieved cloud liquid water content(liquidWaterContent)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)