[LEAPSECS] ISO TC 37

[Rob Seaman]

Steve Allen wrote:


> Warner Losh hath writ:

>> [*] Unless I'm an astronomer or care which way the earth is pointing to sub-minute accuracy.

> 

> The GPS system, and the other GNSS, must know that in order to operate.

> The satellite tracking code, the VLBI code, the LLR code have all been

> written and operated in the presence of leap seconds.  The absence of

> leap seconds could compromise the infrastructure that supports GPS.


See Stephen Malys's* presentation and paper:
	- http://www.cacr.caltech.edu/futureofutc/program/presentations/AAS_11-675_Malys.pptx.pdf
	- http://www.cacr.caltech.edu/futureofutc/preprints/32_AAS_11-675_Malys.pdf

From his summary slide:

	• DoD GPS Monitor Stations, the ‘starting point’ for all GPS Positioning, Navigation and Timing (PNT) are located on the Rotating Earth

	•  A regular source of UT1-UTC predictions will continue to be needed for NGA, GPS and other DoD Satellite Operations

	•  Allowing UT1-UTC to grow beyond the current 1 sec limit
		•  Will require resources to modify existing ICDs and operational software
		•  Offers no benefits to NGA or GPS Operations

Rob

* Senior Scientist for Geodesy and Geophysics, InnoVision Basic and Applied Research Office, National Geospatial- Intelligence Agency
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://six.pairlist.net/pipermail/leapsecs/attachments/20120117/b3953f1a/attachment.htm>