Satellite-flown instruments have been acquiring data that pertain to the Earth's atmosphere, cryosphere, land, and oceans since the early 1970's. These data include measurements over time from a variety of instruments with different spatial and temporal resolutions. The data can provide answers to earth-science questions, for example, What changes in radiation budgets are associated with global climate change? Each instrument alone may provide answers to specific questions that relate to the instrument's spatial and temporal coverage. To address broader questions, we integrate data from multiple instruments to obtain spatial/temporal coverage and resolution that are greater than coverage and resolution of individual instruments. We utilize instrument- measurements and human observations available from surface weather stations to validate and complement data from satellite-flown instruments. In a preliminary investigation we automatically constructed a decision-tree model from AVHRR data labeled with surface observations. The decision tree detected clouds from test AVHRR data with accuracy that was 25-percent better than the accuracy of human-generated decision trees. TRL: 3-4 tested on cloud detection from AVHRR data with good results