SGP/MWRHF/C1 - Missing data

Software versions 8.30 and 8.4 were causing problems in the instrument. Data are mostly 
missing. On 8/23 the old software version was installed (V8.17).

• Environmental Temperature (hybrid-b grid)(temp)
• time_in_seconds_since_volume_start(time)
• Derived pressure(pressure)
• North Latitude(lat)
• Relative Humidity (hybrid-b grid)(rh)
• lon(lon)
• Beam Elevation Angle(elevation)
• base time in epoch(base_time)
• Rain flag(rain_flag)
• -180.0 - +180.0(alt)
• Sky brightness temperature (150 GHz)(tbsky150)
• Sky brightness temperature (90 GHz)(tbsky90)
• Time offset from base_time(time_offset)