|Space Telescope Science Institute|
|COS Data Handbook v.3|
Users are reminded to consider the large size of counts and flt files when allocating disk space for storing and reprocessing COS data. Additionally, corrtag files with a large number of events can be quite large. These images serve as intermediate or final calibration products from the pipeline and have the file sizes given in Megabytes in Table 2.13. Note, that these sizes are per exposure, and an associated observation set may have several exposures.Table 2.13: COS Pipeline Data Volumes per Exposure
0.5MB1 1MB2 Values pertain to x1d_a or x1d_b files only. These files are temporary output products from calcos processing
Similarly, users are reminded of the large cumulative size of calibrated COS spectroscopic datasets. Table 2.14 provides volume estimates for calibrated COS datasets.
Standard calibrated files1 + 39 bytes per photon2 + 36 bytes per photon3 Approximately 70 MB per BUFFER-TIMEApproximately 52 MB per BUFFER-TIME