Science Window data: scw

Data files located under the scw directory result from ISDC science window and revolution file pipeline processing. Figure 14 shows the directory structure of scw.

Figure 14: Subdirectory structure of scw for revision 1 data. For revision 2 and 3 data, directory RRRRPPPPSSSF.VVV does not have any further subdirectories.

Each of the first-level subdirectories under scw has a name of the form RRRR corresponding to an orbital revolution number of the S/C as assigned by ISOC, and contains science window data sets derived from telemetry acquired during that revolution. Each RRRR directory contains a number of science window and revolution file subdirectories with names of the form RRRRPPPPSSSF.VVV and rev.VVV, where

• RRRR is the revolution number,
• PPPP is the ISOC assigned pointing number,
• SSS is a sequence used to subdivide pointings or slews during processing if required, and
• F is a flag representing the science window type (0 = pointing, 1 = slew, 2 = non-science, values larger than 2 are undefined),
• VVV is the version number of the directory, increased with each processing.

The 12 digits RRRRPPPPSSSF form a unique name of a given science window: the Science Window IDentifier (ScWID). The individual science window directories RRRRPPPPSSSF.VVV contain data relating to a single science window, whereas the revolution file directories rev.VVV contain data derived from a series of science windows from a given revolution.

For revision 1 data, the structure of each RRRRPPPPSSSF.VVV consists of a subdirectory for each instrument and one subdirectory eng for engineering data. Under each instrument directory you find the Science Window Group of prepared level, which location you should specify before you start the analysis. The eng directory is optional if no engineering-related data exists for the science window.

For revisions 2 and 3, all the data are located directly in RRRRPPPPSSSF.VVV, without any further subdirectories.

The rev.VVV directories store the revolution file data produced by different subsystems. Under this directory you find data which are generally associated with the instrument configuration and calibrations.