NIM/MWRP/M1 - Software problem

The MWRP computer failed and it was cloned with a new Gx620. Soon after, the MWRP program 
started to crash and was intermittent. Data were lost on March 3, 4, 5. 
On March 7 the program was forcefully ended and restarted. This appears to have cleared 
the problem. The instrument has been running since.

• Raw data stream - documentation not supported(raw)

• Level of free convection pressure(levelFreeConvectionPres)
• east longitude for all the input platforms.(lon)
• Time offset of tweaks from base_time(time_offset)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Solar azimuth referenced to the Central Facility.(azimuth)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• Retrieved cloud liquid water content(liquidWaterContent)
• Surface relative humidity at instrument(surfaceRelativeHumidity)
• altitude above sea levelaltunits(alt)
• Lifting condensation level(liftingCondensationLevel)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• Derived virtual temperature(virtualTemperature)
• Elevation angle of Beam 0(elevation)
• Convective available potential energy(cape)
• Temperature used to determine the backscatter profile(temperature)
• Internal blackbody reference temperature(blackbodyTemperature)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Level of free convection(levelFreeConvection)
• Flag indicating moisture sensor status(wetWindowFlag)
• Cloud-base height, from Micropulse LIDAR or Belfort LIDAR ceilometer(cloudBaseHeight)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Equilibrium level(equilibriumLevel)
• Time offset from base_time(base_time)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
• Equilibrium level pressure(equilibriumLevelPres)
• Surface absolute temperature at instrument(surfaceTemperature)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Surface pressure at instrument(surfacePressure)
• Derived relative humidity(relativeHumidity)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• north latitude for all the input platforms.(lat)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Data quality flags(dataQualityFlags)
• Interpolated dewpoint temperature(dewpointTemperature)
• Frequency(frequency)
• Retrieved water vapor density(waterVaporDensity)
• Retrieved liquid water path(liquidWaterPath)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Retrieved total precipitable water vapor(totalPrecipitableWater)

• Raw data stream - documentation not supported(raw)

NIM/MWRP/M1 - IRT Sensor Calibration

Discrepancies between the MWRP and Skyrad IRT were observed in January. The MWRP IRT 
readings were constantly higher than those of the skyrad IRT. Some changes were introduced to 
the MWRP IRT to address the problem (see DQR D060602.2). On May 3, the IRT mirror was 
replaced. After the change in the mirror, the MWRP IRT readings became about 5-8 C lower. On 
June 3 the agreement between MWRP and Skyrad IRT became satisfactory (2-5 degree C 
difference).

It is hard to numerically quantify the difference in the IRT readings caused by the change 
in the mirror. We can only warn the user that between January 1 and June 3 the MWRP 
readings are 8 to 15 degree higher than the skyrad IRT.

• Raw data stream - documentation not supported(raw)

• Zenith-pointing infrared temperature at 10um(infraredTemperature)

• Raw data stream - documentation not supported(raw)

NIM/MWRP/M1 - Reprocess: IRT configuration setting error

The infrared thermometer settings (IRT) were not configured as specified by the 
manufacturer. The analog output was set to a range of -60 to +50 C (0-10V) instead of -50 to +50 C 
(0-10V). The settings were changed on April 20. The IR temperatures should be slightly 
smaller than reported.

The following formula can be used to convert the wrong readings to the new:
    T_new = -60 + 1.1(T_old+50) 
where all temperatures are in degree C. For example, if T_old = 30 C, T_new = 28 C.

• Zenith-pointing infrared temperature at 10um(infraredTemperature)

NIM/MWRP/M1 - IRTs do not agree with AERI

Since deployment at PYE, and then at NIM, the AMF SKYRAD IRT measured about 10K higher sky 
temperatures than the AERI and the MWRP IRT measured about 20K higher than the AERI.  
Several actions were taken to diagnose the problem including confirming the correct 
configuration of the IRTs and data logger, cleaning the mirror and lens, and replacing the mirror.

After several days of rain beginning 6/2/2006, the three instruments came into agreement. 
It is unknown whether this was a problem with the AERI, MWRP-IRT or SKYRAD-IRT.

• Zenith-pointing infrared temperature at 10um(infraredTemperature)