  A stellar occultation by Pluto on 5 September 2019 yielded positive
detections at two separate stations. Using an approach consistent with
comparable studies, we derived a surface pressure of $11.478 \pm
0.55~\mathrm{\mu bar}$ for Pluto's atmosphere from the observations of this
event. In addition, to avoid potential method inconsistancies highlighted by
Sicardy et al. when comparing with historical pressure measurements, we
reanalyzed the data by 15 August 2018 and 17 July 2019 events, respectively.
All the new measurements provide a bridge between the two different
perspectives on the pressure variation since 2015: a rapid pressure drop from
previous studies of the 15 August 2018 and 17 July 2019 events and a plateau
phase from that of the 6 June 2020 event. The pressure measurement from the 5
September 2019 event aligns with those from 2016, 2018, and 2020, supporting
the latter perspective. While the measurements from the 4 June 2011 and 17 July
2019 events suggest probable V-shaped pressure variations unaccounted for by
the volatile transport model (VTM) from Meza et al., the VTM remains applicable
on average. And, the validity of the V-shaped variations is debatable due to
the stellar faintness of the 4 June 2011 event and the grazing single-chord
geometry of the 17 July 2019 event. To reveal and understand all significant
pressure variations of Pluto's atmosphere, it is essential to provide
constraints on both short-term and long-term evolutions of the interacting
atmosphere and surface by continuous pressure monitoring through occultation
observations, whenever possible, complemented by frequent spectroscopy and
photometry of the surface.
