... 2011) What is Mathematica? Slide 5 of 13 Notation & Assumptions Assuming: GW distance R >> pulsar distance D, = 0, pulsar sky direction precisely known independent noise between frequency bins and across different pulsars (OK for high f) Ignoring O x 2 curvature term in r x see however Deng, X . et al 2011 on the effect GW n Pulsar k Earth x 0 Pulsar p r (x) R 0 Earth GW What is Mathematica? ... n , rL 1 pulsars Earth L, M, J, K 1, 2, .. ... Np pulsars , IJ XI A XI ,IJ rI d00,I rJ . ...

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