... The axis along which the subsets are specified is used as 'gaussfit' axis. ... It must be a set with the subsets defined along a parameter axis. The parameters are the baselevel (may be absent), the normalization, the mean and the width of the gaussian components. ... If the baselevels are not present the normalization will be taken from subset 1 etc.) subset 3 : mean value of the first component. subset 4 : width of the first component. subset 5 : normalization of the second component. ...

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