Impact of the COVID-19 Large-scale Social Restrictions on NO2 and CO Concentrations in the Most Populated Cities in Java Island, Indonesia

The incidence of the COVID-19 pandemic is not expected, it has a positive side, namely improving air quality, especially in major cities in Indonesia. This study aims to observe and evaluate the effect of PSBB on concentrations of NO2 and CO in eight major cities in Java Island before and during the COVID-19 pandemic. Remote sensing data can undoubtedly be observed more widely. NO2 and CO concentration data are obtained from the Sentinel 5P Tropomi Satellite, while the rainfall data is from the CHIRPS (Climate Hazard Infrared Precipitation with Station) were used to analyze the relationship with the impact of PSBB. The result shows that the implementation of PSBB significantly affects concentrations of NO2 and CO decrease in major cities in Java.