[LEAPSECS] yet another satellite time scale

[Magnus Danielson]

Steve,

Steve Allen wrote:

> Within the recent CGSIC proceedings is the overview presentation by

> Lewandowski of the BIPM.

> http://www.navcen.uscg.gov/cgsic/meetings/49thmeeting/Reports/%5B39%5DTiming_WL_General.pdf

> It includes one page plotting the various satellite time scales and

> another showing the Tower of Babel.

> 

> With gratitude toward that presentation and the Peoples Republic of

> China I have enhanced my web pages to include Compass or BeiDou System

> Time (BST) as one of what are now three discernibly distinct broadcast

> time scales for navigation which run parallel to the original

> Ephemeris/Terrestrial Time.

> http://www.ucolick.org/~sla/leapsecs/deltat.html

> This plot is, of course, not making it clear that GPS time and Galileo

> System time (and perhaps others yet to come) are (at nanosecond

> precision) not actually the same time scale.


There are more...

GLONASS timescale is a three-hour offset from UTC(SU), see GLONASS ICD.

WAAS, EGNOS and MSAS have their own timescales, maintained to be 
roughtly that of GPS.

Cheers,
Magnus