منابع مشابه
The Pioneer Anomaly and Its Implications
The Pioneer 10/11 spacecraft yielded the most precise navigation in deep space to date. However, their radio-metric tracking data has consistently indicated the presence of a small, anomalous, Doppler frequency drift. The drift is a blue-shift, uniformly changing with a rate of ∼ 6× 10 Hz/s and can be interpreted as a constant sunward acceleration of each particular spacecraft of aP = (8.74±1.3...
متن کاملThe Pioneer Anomaly
Radio-metric Doppler tracking data received from the Pioneer 10 and 11 spacecraft from heliocentric distances of 20-70 AU has consistently indicated the presence of a small, anomalous, blue-shifted frequency drift uniformly changing with a rate of ∼ 6 × 10-9 Hz/s. Ultimately, the drift was interpreted as a constant sunward deceleration of each particular spacecraft at the level of aP = (8.74 ± ...
متن کاملPioneer anomaly and the helicity-rotation coupling
The modification of the Doppler effect due to the coupling of the helicity of the radiation with the rotation of the source/receiver is considered in the case of the Pioneer 10/11 spacecraft. We explain why the Pioneer anomaly is not influenced by the helicity-rotation coupling. PACS: 03.30.+p ; 04.20.Cv
متن کاملParametric invariance and the Pioneer anomaly
It is usually assumed that the t parameter in the equations of dynamics can be identified with the indication of the pointer of a clock. Things are not so simple, however. In fact, since the equations of motion can be written in terms of t but also of t′ = f(t), f being any well behaved function, any one of those infinite parametric times t′ is as good as the Newtonian one to study classical dy...
متن کاملThe Pioneer Anomaly and a Machian Universe
Abstract We discuss astronomical and astrophysical evidence, which we relate to the principle of zero-total energy of the Universe, that imply several relations among the mass M , the radius R and the angular momentum L of a ”large” sphere representing a Machian Universe. By calculating the angular speed, we find a peculiar centripetal acceleration for the Universe. This is an ubiquituous prope...
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ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2006
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas:2006078