On 6/2/20 3:24 PM, Tim Shoppa wrote:
Hal, at one point shortly after their discovery in the late 60’s, Pulsars were
considered as a possible primary frequency standard. Then atomic clocks became
more amenable as lab standards.
As to time-nut measurements on pulsars, check this out:
https://arxiv.org/abs/0909.1054
Millisecond and binary pulsars are the most stable astronomical standards of
frequency. They can be applied to solving a number of problems in astronomy and
time-keeping metrology including the search for a stochastic gravitational wave
background in the early universe, testing general relativity, and establishing
a new time-scale. The full exploration of pulsar properties requires that
proper unbiased estimates of spin and orbital parameters of the pulsar be
obtained. These estimates depend essentially on the random noise components
present in pulsar timing residuals. The instrumental white noise has
predictable statistical properties and makes no harm for interpretation of
timing observations, while the astrophysical/geophysical low-frequency noise
corrupts them, thus, reducing the quality of tests of general relativity and
decreasing the stability of the pulsar time scale.
http://neutronstar.joataman.net/amateur_challenges/
described as "A collection of information about amateur pulsar detection"
Vela is your best bet - 5 Jy @ 400 MHz - but you've got to be in the
southern hemisphere.
B0329+54 is recommended for northern hemisphere. 1.5 Jy at 400 MHz, 0.2
Jy at 1400 MHz. The period is 0.714 seconds
1 Jy = 1E-26 W/m2/Hz.
-230 dBm/m2/Hz
if you've got 10 MHz integration BW, then that helps by 1E7, so you're
up to -160 dBm/m2
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
