“Novel 2019 Coronavirus Outbreak” through the Eyes of GNSS Signal

Besides the global crisis of novel COVID-19 outbreak, we have presented other side towards an environmental perspective. Due to economic shutdown major cities, outbreak has significantly influenced air quality in atmosphere and also affected tropospheric refraction on Global Navigation Satellite System GNSS signal propagation horizontally stratified column. We suggest that variation Zenith Tropospheric Delay (ZTD) column can be used as a proxy for pollution-monitoring tool future. Although case study from mainland China, hypothesis tested globally.