The following tasks belong to the category MANIPULATION: . Data manipulation/changes of data values'' In parentheses the name of the source file is given. ... This program cleans maps or lines. ( clean.c ) . ... COPY . Program to copy set and subsets. ... BLANKs will be written in the output set outside the original subset frame. ( copy.shl ) . ... Program to copy set and subset. ... Find data values at positions of blanks interpolating the data in a small volume around the blanks. ...

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