[IGSMAIL-4381]: Summary of GGAO Maser Instability

Fri May 16 09:41:28 PDT 2003

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IGS Electronic Mail      16 May 09:42:35 PDT 2003      Message Number 4381
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Author: Irv Diegel

I was just made aware that the IGSMail list does not support attachments. Sorry for the confusion.

Basic summary of GGAO Frequency Instability:

On DOY 134 @ 15:25 UT the GGAO maser frequency took off at a high offset rate of -4.43E-11. (Prior to this, the frequency offset had been a nominal 1.59E-13)

Between the above time and DOY 135 @ 10:45 UT the average frequency offset rate was -4.43E-11.

On DOY 135 @ 10:45 UT the problem was corrected. After several hours, the maser settled in at its current offset rate of 1.07E-14. The maser is fully stable at this time.

Irv Diegel
HTSI Maser Group