The summary table contains the sum of the number of visits and exposure time over all of the records returned in the matching observations table.
Science Target Name: AIS_67_sg24
Observation Position: RA=92.5266 DEC=47.2743  (J2000)

The matching observations table lists all of the extant and planned observations in the database that satisfy your search criteria. Extant observations will have a nonzero value in the 'Total Exposure Time' and/or 'GR4 Archival Exposure Time' columns. Data for observations released as part of GR4 are also available for download from MAST. The 'Planned Exposure Time' column can be used to determine: observations for which there are no future planned exposures (value will be 'completed'); observations which are planned for the future (value will be nonzero); and observations which have resulted in an overcountrate shutdown of the FUV and/or NUV detector (value will be 'shutdown' and the record will be highlighted in pink). The Number of Visits corresponds to the Total Exposure Time.
Consult the sky plot for a map of the region of the sky that circumscribes the position component of your query and with matching archival observations that satisfy the optics wheel and survey type components of your query.
Science Target Name: AIS_67_sg24
Observation Position: RA=92.5266 DEC=47.2743  (J2000)

SQL query used to return matching observations.