Adding Commentary to History Recording

Once history recording is enabled, you can add commentary to an NDF using HISCOM.

     % hiscom hr1068 i "There may have been cloud during the integration."

You aren't limited to single lines if you respond to the prompt for the comment. You can give a series of lines, terminated by supplying !.

     % hiscom hr1068
     COMMENT - Comment line > The dome may have been obstructing the telescope 
     COMMENT - Comment line > during the integration.  We are not sure that the
     COMMENT - Comment line > filter is correct either.
     COMMENT - Comment line > !

If you prefer, you may edit some text into a file and append its contents to the history records. Thus

     % hiscom hr1068 f file=comments.lis

appends the text contained in comments.lis to the history records of NDF hr1068.