| Description: | Beginning suddenly, near 1330 UTC on 31 May 2011, the liquid water and all three WFOV
channels began showing intermittent and frequent ?drop-outs? in the photon counting signals.
These drop-outs were periods when the signal would momentarily fade and then come back.
This problem, which was traced to a malfunction of the Licel data recorders, occurred at
irregular intervals and with such frequency as to render the data from the affected
channels useless. This problem persisted until repairs were made to the Licel transient
recorders on 19 August 2011.
Although only the WFOV channels (and liquid water channel) were affected, the aerosol and
water vapor mixing ratio VAPs are computed by combining NFOV and WFOV channels. Thus, all
of these higher level data products were adversely impacted by the drop-out problem.
The NFOV data in the sgprlC1.a0 and sgprlprofmerge1turnC1.c0 datastreams were unaffected
by the "drop-out" problem. These signals could be used to compute aerosol optical
properties and water vapor mixing ratio. |
| Measurements: | sgp10rlprofasr1ferrC1.c1: - Corrected Aerosol volume backscatt. coeff. at 355 nm - removed negative vals(corr_bscat)
- cal_asr_low
- cal_asr_error_low
- bscat_err
- cal_asr_1_error
- Aerosol scattering ratio profile created by merging the two channels(asr_1)
- scale_add_lo
- asr_error_low
- diff_trans_aerosol_corr
- cloud_mask
- cal_factor_lo
- cal_asr_1
- Aerosol scattering ratio profile from the low channel(asr_low)
- Backscatter(backscatter)
- asr_1_error
sgprlprofmerge1turnC1.c0: - solar_background_nitrogen_low
- nitrogen_counts_low_glue_coef_slope
- solar_background_water_low
- parameters_water_low
- solar_offset_nudge_nl
- elastic_counts_low
- solar_offset_nudge_wl
- electronic_background_elastic_analog_low
- solar_offset_nudge_el
- nitrogen_counts_low_glue_coef_offset
- solar_background_elastic_low
- parameters_elastic_low
- water_counts_low_glue_coef_offset
- elastic_counts_low_glue_coef_slope
- electronic_background_nitrogen_analog_low
- water_counts_low_glue_coef_slope
- liquid_counts_high_glue_coef_slope
- solar_offset_nudge_lw
- liquid_counts_high
- electronic_background_water_analog_low
- liquid_counts_high_glue_coef_offset
- parameters_nitrogen_low
- elastic_counts_low_glue_coef_offset
- Raman backscatter, number of photons counted in the low nitrogen channel(nitrogen_counts_low)
- water_counts_low
sgp10rlprofmr1turnC1.c1: - wv_rl_max_height
- mixing_ratio_low
- pwv_rl_fraction
- Water vapor mixing ratio profile created by merging the two channels(mixing_ratio_1)
- Water vapor mixing ratio profile; combines 2 calibrated channels with sfc. obs.(mixing_ratio_3)
- Water vapor mixing ratio profile created by merging the two calibrated channels(mixing_ratio_2)
- relative_humidity_over_ice
- mixing_ratio_1_error
- relative_humidity
- mixing_ratio_3_error
- mixing_ratio_2_error
- mixing_ratio_error_low
- calib_high_low
- Precipitable water vapor observed by the Raman lidar(pwv_rl)
- pwv_rl_err
sgp10rlprofext1ferrC1.c1: - extinction_low_resolution
- Aerosol optical depth calculated from the extinction_1 profile(aod_1)
- smoothed_backscatter
- extinction_married1
- extinction_married1_error
- extinction_1
- Backscatter(backscatter)
- aod_married1
- aod_bscat_max_ht
- aod_bscat_error
- smoothed_backscatter_error
- extinction_married1_mask
- extinction_from_backscatter
- extinction_from_backscatter_error
- Sa_2
- aod_1_max_ht
- Sa_1
- extinction_low
- Aerosol optical depth from the surface computed from the extinction_1 profiles(aod_1_profile)
- aod_married1_error
- aod_married1_profile
- aod_married1_max_ht
- extinction_low_error
- extinction_1_error
- Aerosol optical depth calculated from the extinction_from_backscatter profile(aod_bscat)
- aod_1_error
- Optical depth, aerosol, from sfc, from extinction_from_backscatter profiles(aod_bscat_profile)
- backscatter_error
sgprlC1.a0: - water_analog_low
- water_counts_low
- Raman backscatter, number of photons counted in the low nitrogen channel(nitrogen_counts_low)
- Raman backscatter, summed analog signal in the low nitrogen channel(nitrogen_analog_low)
- liquid_analog_high
- elastic_analog_low
- elastic_counts_low
- liquid_counts_high
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