NSA/SONDE/C1 - Noisy/Unstable RH and dew point data
The RH readings during the first 8 minutes of this sounding include three apparently incorrect oscillations to near-zero values. After checking the absolutely raw data, it seems as though this period was excessively noisy, resulting in many missing values. The noise abatted and the remaining sounding values are valid.
Low-pass filter the RH and dew point values for the first eight minutes.