Observations of greenhouse gas emissions are critical to monitor the state of the atmosphere, quantify present and historical emissions, and understand global climate change. Observation Package (ObsPack) is a specific format to deliver atmospheric measurements data of trace gasses (Masarie, Peters, Jacobson, & Tans, 2014). However, processing ObsPack products (i.e. GLOBALVIEW) and selecting specific observations for modeling purposes can be cumbersome, as they generally contain hundreds of files. Hence, we developed an open-source R package “robspack” to read, process and plot NOAA/GML ObsPack products. We used an CH4 ObsPack as an example in our code. But it can be easily modified to process ObsPack products for other greenhouse gasses.