This study evaluates the capability of an unconstrained tomographic algorithm to capture 3D water vapor density variability throughout 2017 in Houston. U. S. The algorithm relies solely on Global Navigation Satellite System (GNSS) observations and does not require an initial guess or other specific constraints regarding water vapor density variability within the tomographic domain. https://www.bekindtopets.com/limited-stock-Beanie-aboriginal-Flag-Clothing-the-Gaps-hot-buy/