The reduction and calibration of NPOI 6-station data is of course similar to the one performed on 3-station data, but there are differences mostly related to complexity. ... If you want to skip the exercise outlined in the next section of looking at a raw data file, begin here with reading the 1s averages of visibilities and other data. get_data,'2002-02-15.con' HDS-file opened; mode=READ. ... Finished reading catalogs. ... Scan log read. Observer log read. CONSTRICTOR log read. ...