Performances of Different Global Positioning System Devices for Time-Location Tracking in Air Pollution Epidemiological Studies

摘要

Background:People’s time-location patterns are important in air pollution exposure assessment because pollution levels may vary considerably by location. A growing number of studies are using global positioning systems (GPS) to track people’s time-location patterns. Many portable GPS units that archive location are commercially available at a cost that makes their use feasible for epidemiological studies.