SGP/RL/C1 - Frequent intermittent drop-outs in the WFOV photon counting signals
|DataStreams:||sgprlprofmerge1turnC1.c0, sgp10rlprofext1ferrC1.c1, sgp10rlprofasr1ferrC1.c1,|
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.