SGP/SIRS/E19 - Instrument mux problem
Beginning 7/31, the upwelling_longwave_hemispheric data were intermittent with periods of erratic and missing data typically during daylight hours. A multiplexer was found to be the problem and replaced 8/31 1630GMT.
Bad data are not recoverable during this time range. However, good data exists within the time range specified. The SGPQCRAD VAP datastream provides flags for "good" data and appears to accurately flag bad data during this time range. Users are advised to use this data stream to screen for correct up_long_hemisp values.