ASI/AETH/M1 - Negative black carbon mass

Due to a design flaw - separate plumbing lines on the sample and reference lines - in a 
small laboratory volume differences in the RH between these two lines will oscillate when 
the laboratory A/C cycles on and off. This is a known problem with the Aethelometer model 
(AE-31) currently deployed in the MAOS.

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• Instrument flow rate(sample_flow_rate)
• Optical attenuation(optical_attenuation)
• Reference beam intensity(reference_intensity)
• Time offset from base_time(time_offset)
• Spot size area(spot_size_area)
• base time in epoch(base_time)
• Bypass fraction(bypass_fraction)
• Top of atmosphere spectrum wavelengths(wavelength)
• Sample zero or dark level(sample_dark)
• Equivalent black carbon concentration(equivalent_black_carbon)
• Sample intensity(sample_intensity)
• Specific attenuation sigma(specific_attenuation_sigma)
• Reference zero or dark level(reference_dark)

• (Raw data stream - documentation not supported)