Several different VMO query engines and associated web interfaces are available for data discovery:

• Basic Search is a sequence of simple menus offering selection from available data resources.
• Advanced Relational Search interface at NASA Goddard Space Flight Center (VMO/G) where web-forms are used to build queries that can restrict the search by various criteria. For example, the criteria include date/time, spacecraft or product names, data type, observed data values, data cadence, and more.
• Text query interface developed by University of California, Los Angeles (VMO/U) provides a Google-like search experience.
• A graph of data availability displays when and how much data is available for all VMO resources. Resources can be hidden, re-arranged, time zoomed in or out, etc., and downloaded.