This technical report summarizes the GLOBE Observer dataset from 1 April
2016 to 1 December 2019. GLOBE Observer is an ongoing NASA-sponsored
international citizen science project that is part of the Global
Learning & Observations to Benefit the Environment (GLOBE) Program.
GLOBE Observer is the largest citizen science project in the Earth
Science Division at NASA. Participants use the GLOBE Observer mobile app
(launched in 2016) to collect atmospheric, hydrologic, and terrestrial
observations. 38,000 participants have contributed 320,000 observations
worldwide, including 1,000,000 geotagged photographs. It would take an
individual more than 13 years to replicate this effort. Comparing the
same data types between the GLOBE Observer app and the formal GLOBE
Program, the app doubled data volume and substantially increased
geographic coverage over the study period. GLOBE Observer data are
publicly available at observer.globe.gov.