This dataset is a collection of available merged data products from multiple NASA atmospheric field campaigns conducted between 1983 and 2014, including DISCOVER-AQ, SEAC4RS, DC3, DEVOTE, ARCTAS, INTEX-A, INTEX-B, TRACE-P, and GTE missions. It contains integrated observations compiled across these campaigns into merged files intended to support consistent analysis of atmospheric composition, air quality, trace gases, aerosols, and related environmental conditions. The collection is designed for research applications that compare measurements across missions, study regional and temporal variability, and improve understanding of atmospheric chemistry, pollution transport, and Earth system processes.