ISSA Explanatory Supplement
III. PROCESSING
B. Time-Ordered to Position-Ordered Detector Data
III. PROCESSING
B. Time-Ordered to Position-Ordered Detector Data
After reprocessing the entire survey time-ordered detector data, the scans were broken into segments and re-ordered based on sky position. All scans that cover an area of sky were grouped into one database called an ISSA field. A field is an accumulation of all the time-ordered IRAS data that cross over the region of the sky defined by the field boundaries. The scans defined within an ISSA field were used to make an ISSA image.