global measurement

By admin_wla | Tue, 4 Feb 2014 - 12:13
All of the activities required to specify a global variable, such as ozone. These activities range from data acquisition to the generation of a data-analysis product, and include estimates of the uncertainties in that product. A global measurement often will consist of a combination of observations from a spacecraft instrument (required for global coverage) and measurements in situ (needed to provide reference points for long-term accuracy). Source: NASA (http://earthobservatory.nasa.gov/Glossary)