On 11/7/09 12:29 PM, "Bruce Griffiths" <bruce.griffi...@xtra.co.nz> wrote:
> Tom Va
>> 100 ns / 182 s = 5.495e-10 on November 7
>> 100 ns / 188 s = 5.319e-10 on December 7
>>
>> So your frequency drift in this example is 1.7e-11 / month.
>>
>> /tvb
>>
> Not quite, you need to take the sign of the frequency difference into
> account.
> ie in your example above the sign of the error measured on November 7
> has to be identical to the sign of the error measured on December 7 for
> your calculation to be correct.
>
But the sign of the difference would be obvious from the rotation direction
of the Lissajous.
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