ENA/MWR3C/C1 - Occasional low data rate

The radiometer takes a long time to complete a tip curve and occasionally this results in 
a low data rate of zenith brightness temperatures.

• elevation
• hail_duration
• pwv
• tbsky90
• wind_speed_avg
• wind_speed_min
• surface_pressure
• infrared_temperature
• surface_temperature
• time_offset
• wind_direction_max
• surface_relative_humidity
• pwverr
• tbsky23
• rain_peak_intensity
• lat
• azimuth
• alt
• wind_direction_avg
• wind_direction_min
• hail_accumulation
• hail_intensity
• rain_duration
• time
• tbsky31
• lwperr
• wind_speed_max
• lon
• rain_intensity
• lwp
• base_time
• rain_accumulation