...
how to determine what types of data (exposures, coadds, detection tables, etc) is held within the RSP;
how to determine what data of a given type is present in the RSP (i.e., a coadd covering this patch of sky);
what the Table Access Platform Protocol and Data Butler are, and how to use them;
how to retrieve table data and pixel-level data;
retrieving static and time-series data;
...