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The service provides download access to data from the Space Environment Monitory (SEM) service from the National Geophysical Data Center (NGDC) of the U.S. National Atmospheric and Oceanic Administration (NOAA). Available data include lists of locations monitored by the service, metadata about the locations, and actual satellite monitoring data. Applications can import SEM data for further analysis and processing. API methods support retrieval of descriptions of the data structure provided by SEM, including field names, descriptions, data formats, minimum and maximum values, etc. Methods also support retrieval of the monitoring data itself, giving the specific satellite and time-stamped sensor readings. The API gives access to specifications for the locations monitored, as well.