Re: [amsat-bb] GPS ERROR ? Kep's

[Franklin Antonio <antonio@xxxxxxxxxxxx>]

At 10:29 AM 1/20/2005, Steve kb9ups wrote:
>I have heard that as a result of the tsunami the Earth "lost" 1/2 second 
>in rotation and that the Earth is no longer under the satellites as it was.

I believe you are mistaken.

There was a news story (widely copied) indicating that some guy had 
calculated that the earthquake may have changed the length of the day by 3 
MICROseconds.  This was a calculation rather than a measurement, as the day 
varies enough for other reasons to make it difficult to measure such a change.

Three microseconds is real small relative to any antenna pointing you're doing.

On the other hand, if you have a reference for the half second, please 
point me to it.
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org