There are also some unique problems that arise in treating the resultant data. An abridged version of the Phase II Proposal for 5745 is shown in Figure 22.8 . The geometry of the spatial scan is shown in Figure 22.9 . The splot display shows the relative orientations of the GHRS x,y and HST V2-V3 coordinate systems.
Data points are delta distances in units of arcseconds.
This is the line where we get the spectra. We expect to get about 6750 individual spectra from this observation. The spatial scan specifies a dwell scan that is 15 dwell points by 15 dwell points in extent. The time spent at each dwell point will be 30 seconds. Note that the total number of spectra is 30 one-second exposures, times 15 dwell points, times another 15 dwell points in the other direction, for a total of 6750.