SGP/TSI/C1 - Data processing problem

Values of count_opaque and count_thin are reals but should be integers  (units = pixels).

• count.opaque
• count.thin

SGP/TSI/C1 - Reprocessing Notice (RID 951)

See below for details of reprocessing that was completed on 20140922.  Original 
DQR category: 5 (Transparent - Does not affect quality).

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The units of global attributes region_sun_radius and region_zenith_radius should be 
degrees, not pixels.

• base_time

SGP/RL/C1 - Reprocessing Notice (RID 1026)

See below for details of reprocessing that was completed on 20140822.  Original DQR 
category:3 (Yellow, Suspect ).

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Regions where photon counting rates exceed 20 MHz are 37.5 meters too high. Correct data 
by shifting down 37.5 meters.


Additional information:
The detection system in the RL uses Licel data recorders. These recorders provide 
simultaneous measurements of analog voltage and photon counts from the photo multiplier tubes. 
The analog signal has an inherent delay relative to the photon counting signal, which is 
corrected for in the rlprofmerge VAP. The delay parameter is determined through offline 
analysis by the instrument mentor, and then inputted into a configuration file that is used 
by the VAP.
During the effected period, the delay parameter for the narrow-field-of-view elastic 
channel was incorrect. As a result, the  analog signal leads the photon counting signal by 5 
range bins (5X7.5m = 37.5m). Photon counting rates that are outputted by the rlprofmerge 
VAP use the analog signals in regions where the photon counting rates exceed 20 MHz. So 
the counting rate data in these regions are (incorrectly) shifted downward by 37.5 m (i.e. 
-37.5m).

• height_high
• elastic_counts_high_glue_coef_slope
• elastic_counts_high_glue_coef_offset
• elastic_counts_high
• electronic_background_elastic_analog_high

SGP/MPLCMASK/C1 - Reprocessing Notice (RID 1136)

See below for details of reprocessing that was completed on 20140807.  Original DQR 
category: 4 (Red, Incorrect).

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Linear depolarization ratio calculation incorrect in the VAP processing code.

• linear_depol_ratio

SGP/DL/DLPROF/C1 - Instrumental artifact in vertical velocity variance profiles

Long-term averages of vertical velocity variance profiles developed from vertical staring 
data show a height-dependent sinusoidal modulation superimposed on the atmospheric 
variance profile. This modulation causes a wiggle in the variance profile. The period of the 
wiggle is about 350 m, and the effect is most obvious during hot afternoon periods in the 
summer months. The exact cause of this problem is not known, but we suspect that it may be 
caused by temperature sensitivity in beam alignment.

• Noise corrected vertical velocity variance(w_variance)