GED (Get Erne Data) is a set of IDL programs and auxiliary files for reading and manipulating ERNE level-2 and level-3 science data. In addition, ged is also the name of the main function of the system.
In principle there is only one ged program user needs to know: ged, an IDL function that acts as a front end for the other ged programs. The other functions are called automatically as needed based on the requested data type and prosessing parameter (IDL keyword) settings. However, an effective use of the system at its current state requires also some knowledge of what happens 'behind the scenes'. Specifically user should be aware what keywords are available to control the processing of the data in question. The available keywords depend on the 'lower level' functions that are used to read and process each data type.
The Data stucture entries link to pages with information on the names and types of the fields of the corresponding structures. From the GED reader pages the user can check e.g., the set of available keywords. These keywords are acknowledged when making a ged request for the corresponding type of ERNE data.