 IERS Conventions (2010) by International Earth Rotation and Reference Systems Service

The inspected official standards document lists nominal mean Earth's angular velocity $7.292115\times 10^{-5}\mathrm{rad}{\mathrm{s}}^{-1}$ in table1.2, printedp.18, physical PDF p.19. The numerical wind estimates use this identified external constant; no historical examination-handbook value is asserted.