Troposphere - GNSS Meteorology

JPL 5-second troposphere zenith delays (not yet linked)

SIO 1-hour troposphere zenith delays (not yet linked)

Two applications of GNSS Meteorology

1. Southern California summer monsoon

GPS PWV measurements were used both operationally to track a North American Monsoon event and forecast flash flooding. Circles represent PW (cm) for radiosondes at San Diego, California (blue), and Yuma, Arizona (black). Solid traces show GPS PW measurements at San Diego, California (blue), Durmid, California (red), Glamis, California (black), and Yuma, Arizona (dotted black). Arrows indicate the times of passage of an upper low at the identified GPS-Met sites. Map locates GPS stations with squares at San Diego (blue), Durmid (red), Glamis (black), and Yuma (dotted black), and radiosondes with circles at San Diego (blue) and Yuma (black). PW in mm at the GPS stations is shown, according to the color scale, at 1700 PDT 19 Jul (0000 UTC 20 Jul).  Source: (Moore et al. 2015).

2. Southern California winter atmospheric river sequence

Atmospheric river arrival time isochrones (units of hour) referring to 0:00 UTC on (a) day19, (b) day 20, and (c) day 22 of January 2017 from GPS tracking of atmospheric water vapor. The spacing between isochrones reflects the velocity of AR movement, the wider the faster, the narrower the slower (Wang et al., 2019).


Moore, A.W., I. J. Small, S. I. Gutman, Y. Bock, J. L. Dumas, P. Fang, J. S. Haase, M. E. Jackson, J. L. Laber (2015), National Weather Service Forecasters Use GPS Precipitable Water Vapor for Enhanced Situational Awareness during the Southern California Summer Monsoon, Bull. Amer. Meteorol. Soc. (BAMS) 96(11), 1867-1877.

Wang M., J. Wang, Y. Bock, H. Liang, D. Dong, P. Fang (2019), Dynamic Mapping of the Movement of Landfalling Atmospheric Rivers over Southern California with GPS Data, Geophys. Res. Lett, 46.