Next: Contents Up: Description Previous: Description Index . ASAP data handling works on objects called scantables. ... Each row contains just one spectrum for each beam, IF and polarisation. ... A collection of cycles for one source is termed a scan (and each scan has a unique numeric identifier, the SCANNO). ... If you have scan-averaged your data in time, i.e. you have averaged all cycles within a scan, then each scan would hold just one (averaged) integration. ...
metrologia The leap second: its history and possible future R. A. Nelson, D. D. McCarthy , S. Malys, J. Levine, B. Guinot, H. F. Fliegel , R. L. Beard and T. R. Bartholome w Abstract. This paper reviews the theoretica l motivatio n for the leap second in the context of the historica l evolutio n of time measurement . Th e periodic insertio n of a leap second step into th e scale of Coordinate d Universal Time (UTC) necessitates frequent changes in comple x timekeepin g systems an d is currentl y th e