To study the differences and similarities between high-resolution and conventional observations of fog microstructure,we conducted an extensive 58-day field observation of fog during the winter of 2020 in Donghai,Lianyungang.Two fog monitors operating at different frequencies (5 Hz and 1 Hz) were employed simultaneously to measure radiation fog on December 28,2020.Our observations revealed that the 5 Hz measurements exhibited a greater range of extreme values compared to the 1 Hz data.Over the entire fog process,the 5 Hz fog droplet spectrometer measurements,when averaged to 1 Hz,demonstrated less similarity to the original 1 Hz results during the fog's generation and dissipation stages,while showing more similarity during the maturation and development stages.Concerning spectral patterns,both 5 Hz and 1 Hz measurements exhibited similarities,with notable differences occurring at the peaks.Both 5 Hz and 1 Hz measurements effectively depicted the relationship between microphysics at different stages of the fog process,with primary differences emerging during the fog generation stage.This divergence may be attributed to the relatively limited activation and condensation growth of new fog droplets observed by the 5 Hz instrument during this stage.