Bad observations

In some cases, it is desirable to remove some frames (observations) from a group. For example, you make 5 observations of a source but you see that when the pipeline combines observation 3 into the group the noise is dominated by this observation. In order not to contaminate the group when observations 4 and 5 are coadded the pipeline must be instructed to remove observation 3 from any further group operations.

Observations can be turned off by using a special type of ORAC-DR index file (cf. index files generated by skydip and calibration observations).

This index file is called index.badobs and should be present in the ORAC_DATA_OUT directory. It should contain a line for each observation to be removed. Each line should contain the observation number and the 8 digit UT date (YYYYMMDD), e.g.:

55  19990128
62  19990129