Next: Initial ``fixes'' to millimetre Up: Practical loading and calibration Previous: Practical loading and calibration . ATCA millimetre observations are loaded into Miriad in much the same fashion as centimetre data: task atlod is used. One difference is that it is generally desirable to load both observing bands together, to allow joint calibration. A shortcoming of Miriad is that it is poor at handling multiple observing bands when the polarisation products differ between the bands . ...

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