PSN-L Email List Message

Subject: from Angel in Panama
From: "a.rodriguez" stuff@.................
Date: Sat, 3 May 2003 06:31:56 -0500

Hello Everyone,

I have a general question about GPS timing.

I have several systems that have GPS timing systems and have always
assumed that they were "right on", but now I have my doubts.

I have one system on that is using a Motorola Oncore with and
interface from Larry.  I then use TAC32 to read the GPS time and set the
PC time.

Based on some conversations with Mauro and some of the work on the
array I decided to check the GPS clocks.

I set TAC32 to read the GPS but not set the PC time, ever.  Then I set
Tardis to get the time via NTP and set the PC time every second. Then
I set TAC32 to show the difference between GPS time and the PC time.

I get a consistent difference of .825 seconds. I have calculated the
cable losses from the antenna and they don't seem to be able to
account for all of that.

Anyone have any ideas??

On a difference note, just last night I was able to locate two
events using nothing but the small array!!  I will try to update the web
page this weekend.




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