On May 6, 10:34 pm, dlzc wrote:
Dear Albertito:

On May 6, 10:29 am, Albertito wrote:

If we observe the so called Pioneer anomaly as
an unexpected constant Doppler blue-shift
drift, then we should expect a constant Doppler
red-shift drift, if the experiment were
performed from a Pioneer probe as the base
reference and the Earth were the target.

What would be the cause of this? I would be interested in the
mechanism you expect, and why it has not been seen so far.


Gravitational Doppler shifts occurring in a way that GR
can't predict.

From that point of view, we'd wrongly conclude
that the Earth is not where it should be. IOW,
we would observe the Earth from a Pioneer
probe as orbitally decaying toward the Sun.

No, following your "model", the Sun and all the planets you are
passing also are anomalously accelerated away from you (Sunward).


That's what I said, an anomalous acceleration toward
the Sun.


Should we conclude then that the Earth is
radiating gravitational waves?

One (Pioneer anomaly) has nothing to do with the other (disspation of
angular momentum in quadrature, meaning above or below the ecliptic
where the Pioneer travelled).

David A. Smith