GRW/MWR/M1 - Loose mirror

The data from the MWR were suspicious and became progressively worse. The problem was 
traced back to the fact that the screw that keeps the mirror in place had become loose and 
the mirror was freely rotating. 

The mirror was tightened on 6/9/2009, however the measurements were noisy until 6/16, when 
the instrument was rebooted and all the connections checked. 

Measurements between 5/1 and 6/9 should not be used. Data between 6/9 and 6/16 are usable, 
although they are very noisy.

• vaptip
• bb31
• bbn23
• tbsky23tip
• bbn31
• tbsky31tip
• tipsky23
• bb23
• tipsky31
• liqtip

• sky23
• bbn23
• Total water vapor along LOS path(vap)
• bbn31
• Total liquid water along LOS path(liq)
• sky31
• 31.4 GHz sky brightness temperature(tbsky31)
• bb31
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• bb23

GRW/MFRSR/M1 - Minor shadowband misalignment

A minor shading problem affected the morning hours (sunrise - 0930 UTC).  Maintenance on 
20090709 resolved the problem.

• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter1
• direct_horizontal_broadband
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• diffuse_hemisp_narrowband_filter5_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• diffuse_hemisp_narrowband_filter1_raw
• diffuse_hemisp_narrowband_filter6_raw
• diffuse_hemisp_narrowband_filter3_raw
• diffuse_hemisp_narrowband_filter2_raw
• diffuse_hemisp_broadband
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• diffuse_hemisp_narrowband_filter4_raw
• diffuse_hemisp_broadband_raw

• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• diffuse_hemisp_broadband
• direct_horizontal_broadband
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter5

GRW/MWR/M1 - Reprocess: Biased LWP retrievals-Updated retrieval coefficients

Retrieval coefficients were updated to screen for some bad soundings

• liqtip

• Total liquid water along LOS path(liq)

GRW/WACR/M1 - Coherence Filter Contamination

The coherence filter (software) that was added to the WACR under BCR-01500 was causing 
occasional contamination to WACR data.  This was exhibited in the first 2000 m of range by 
streaking in the data over a period of time. It didn't occur often and when it did, it is 
quite obvious looking at the plots.  

On 4/2/2010 at 12:00 UTC, the coherence filter was modified to preclude working on signals 
with a SNR greater than 60 dB.  The vendor thinks this will solve the problem.

• lat
• PowerHotLoad
• Temp_Computer_Enclosure
• Temp_Antenna_Bottom
• SignalToNoiseRatio
• heights
• PowerAmbientLoad
• Temp_LNA
• Polarization
• Temp_Modulator_Control
• PowerTransmitDriver
• Temp_Hot
• txpower
• MMCR Spectral Width(SpectralWidth)
• Temp_ambient
• Noise
• Temp_Outside
• Temp_Future
• base_time
• alt
• time
• time_offset
• wacr_status
• Temp_Chiller
• lon
• Cloud, reflectivity, at altitude(Reflectivity)
• Temp_Antenna_Top
• Temp_Chiller_Supply
• Temp_modulator
• Temp_EIKA
• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• Temp_Chiller_Return