20071213   16:07 UT EISCAT 1pps _|- is 29 us behind Datum 1pps -|_
20080108   15:07 UT EISCAT 1pps _|- is 27 us behind Datum 1pps -|_
20080116   12:   UT EISCAT 1pps _|- is 01 us ahead  Datum 1pps -|_
20080205   09:   UT EISCAT 1pps _|- is 4.4us behind Datum 1pps -|_
20080205   17:30 UT EISCAT 1pps _|- is 6.4us behind Datum 1pps -|_
20080206   21:41 UT EISCAT 1pps -|_ is 4.6us behind Datum 1pps -|_
20080208   11:30 UT EISCAT 1pps _|- is 28 us behind Datum 1pps -|_
20080211   08:00 UT EISCAT 1pps _|- is 28 us ahead  Datum 1pps -|_
20080212   13:00 UT EISCAT 1pps _|- is 29 us ahead  Datum 1pps -|_
20080226     :   UT EISCAT 1pps _|- is 4.4ms ahead  Datum 1pps -|_
20080226   17:21 UT EISCAT 1pps _|- is 26 us ahead  Datum 1pps -|_   Set clock
20080312   08:18 UT EISCAT 1pps _|- is 12.4us ahead Datum 1pps -|_  
20080326   10:   UT EISCAT 1pps _|- is 6.3us  ahead Datum 1pps -|_  
20080527   09:   UT EISCAT 1pps _|- is 850us  ahead Datum 1pps -|_  
20080609   08:15 UT EISCAT 1pps _|- is 26.5us ahead Datum 1pps -|_  Set clock
20080626   08:03 UT EISCAT 1pps _|- is ~30 us ahead Datum 1pps -|_ 
20080626   10:38 UT EISCAT 1pps _|- is 340 us ahead Datum 1pps -|_ 
20080626   10:39 UT EISCAT 1pps _|- is  84 us ahead Datum 1pps -|_  Set clock
20080908   18:22 UT EISCAT 1pps _|- is 960us behind datum 1pps -|_ 
20080908   18:23 UT EISCAT 1pps _|- is 10.4us behind datum 1pps -|_  Set clock
20080929   08:18 UT EISCAT 1pps _|- is 4.4us  ahead datum 1pps -|_  Set clock
20081021   12:06 UT EISCAT 1pps _|- is 16us   ahead datum 1pps -|_ 
20081022   07:07 UT EISCAT 1pps _|- is 13.2us ahead datum 1pps -|_ 
20081023   07:18 UT EISCAT 1pps _|- is 13.5us ahead datum 1pps -|_ 
20081024   07:45 UT EISCAT 1pps _|- is 13.4us ahead datum 1pps -|_ 
20081027   17:40 UT EISCAT clock and 5 MHz problems- our clock also wrong
20081027   07:54 UT EISCAT 1pps _|- is 26  us ahead datum 1pps -|_ 
20081117     :   UT EISCAT 1pps _|- is 4.4 us ahead datum 1pps -|_  set clock
20081125   13:18 UT EISCAT 1pps _|- is 21.0us ahead datum 1pps -|_  set clock
20081128   13:18 UT EISCAT 1pps _|- is  17 us ahead datum 1pps -|_ 

2008
-----
A GPS controlled crystal oscillator purchased from ebay in early 2008
(item 330213218668 for US$455, Part Number/Name GCRU EP92-0079A...) 
as the new 10MHz frequency reference for the transmitter hall exciters.


12 May 2011
-----------

A Rubidium frequency standard (SRS) is now the 10MHz frequency
reference for the exciters in the transmitter hall. It is free
running, i.e. not disciplined by GPS.


March 12 2013:
--------------
The SRS Rubidium standard in the tx-hall now has an external
1pps added from an Adafruit GPS receiver. This should improve
long-term frequency stability.