James Tralie ’19



Project Title

GPS Meteorology at Princeton University: A Case Study

Presentation Link

View James's Presentation

I studied the integration of GPS-receiver data with collocated weather-station data to measure the integrated water vapor (IWV) concentration in the atmosphere above Princeton, New Jersey. Through this study, we generate crucial atmospheric data concerning water vapor that will aid with the analysis of hurricane systems, greenhouse gas concentrations, and ultimately the climate of the Princeton area. Through my research, I gained skills in MATLAB and Linux that will help me immensely as I continue in the geosciences. Working with raw GPS and weather data afforded me the incredible opportunity to truly understand the generation and subsequent transfer of a GPS signal to a ground-based receiver. Then, using MATLAB scripts I wrote, I implemented the translating and unpacking of the GPS data into readable and understandable information. In addition, I discovered the geometry necessary to translate the received GPS signals into latitudinal, longitudinal and altitudinal coordinates of the ground-based receiver. I will continue to use the skills I developed during this internship as I begin new climate-modeling projects.

* This internship is connected to the PEI Urban Grand Challenges project, “Guyot Physics: Princeton University as an Urban Science Node.”

Internship Year


Project Category

Resilient Cities


Department of Geosciences, Princeton University


Jessica Irving, Assistant Professor of Geosciences