EDAC Help: Searching the data catalog

In this section:

Introducing the Catalog tab

The Catalog tab allows the user to quickly search for files in the selected dataset that match certain criteria: (i) the percent of data coverage for a region of interest, and (ii) the date and time of the data measurement. The catalog results show either a set of icon previews for each matching result or a sortable list view of the results. For any given result, the user can show the data in the View tab, or access the data by file download or OPeNDAP form.

Components of the Catalog tab

The following figure shows the main components of the client when the Catalog tab is selected:

Dataset selector
The name of the current dataset being displayed. A dataset consists of a number of files, each of which contains data for a specific date and time. The catalog searches only the selected dataset for matching files.
Region parameters
The region and minimum coverage value to search. A region may not contain data for a given date and time because of a variety of factors: cloud cover over the region obscuring the surface, ice, rain, the region is beyond the satellite scan path, etc. Only data with coverage above the specified minimum value in the selected region will be reported.
Date/time parameters
The date and time range to search. Only data files whose starting date/time fall within the specified time range or past number of days are reported.
Catalog results
The results of the most recent search. The message at the bottom of the results panel may indicate zero matches if none were found in which case the search parameters should be relaxed. Otherwise, the results panel shows either a set of preview icons for the resulting matches or a detailed sortable list of the matches. Double-click the preview icon or list entry to switch to the View tab and display the data. As an alternative, users may download the file directly or show the OPeNDAP form using the data access buttons at the bottom (see Accessing data files for details).

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