Science data is stored as single-precision floating point values. There are either 1, 2, or 4 files in the data set, and each file contains a time series of photon counts. The number of files in the data set depends on the mode (sky, star or both) and the data type (analog, digital or both). Science Data files are identified by the extensions ``.D0H'', ``.D0D'', ``.D1H'', ``.D1D'', ``.D2H'', ``.D2D'', ``.D3H'', ``.D3D''. The extension numbers as determined by the data format and the mode are listed in Table 3.
