Root Mean Square density fluctuations derived from PSP in situ measurements. Panel (a) displays the electron density measured by PSP/FIELDS instrument. Panel (b) presents moving averages of the electron density over a time window of approximately one minute. In panel (c), we illustrate the maximum small-scale fluctuations for this time window within the specified epoch. Finally, panel (d) depicts the RMS relative density fluctuations observed. Notably, the instantaneous density fluctuations tend to be more pronounced in regions of higher electron density.