scholarly journals Pioneer 10 and 11 Spacecraft Anomalous Acceleration in the light of the Nonsymmetric Kaluza-Klein (Jordan-Thiry) Theory

2015 ◽  
Vol 63 (11-12) ◽  
pp. 711-918 ◽  
Author(s):  
M. W. Kalinowski
Keyword(s):  
Anomalous Acceleration ◽  
Pioneer 10 ◽  
Kaluza Klein

PRESENT STATUS OF THE STUDY OF THE ANOMALOUS ACCELERATION OF THE PIONEER 10/11 SPACECRAFT

2005 ◽  
Vol 20 (11) ◽  
pp. 2304-2308 ◽  
Author(s):  
J. P. MBELEK
Keyword(s):  
Weak Field ◽  
Low Velocity ◽  
Pioneer Anomaly ◽  
Real Change ◽  
Local Manifestation ◽  
Anomalous Acceleration ◽  
Expansion Of The Universe ◽  
The Universe ◽  
Pioneer 10 ◽  
Radiometric Data

Results from an almost twenty years study of radiometric data from Pioneer 10/11, Galileo and Ulysses spacecraft indicate an anomalous time depending blueshift1, 2 which bares hardly prosaic explanations. Local manifestation of the expansion of the universe or new force terms are not favored either by the observational data. So, we explore the possibility that the reported anomaly, referred to as the "Pioneer anomaly", does not result from a real change in velocity. It turns out that the main Pioneer anomaly may be looked at as a new validation of general relativity (GR) in the weak field and low velocity limit on account of the "machian" behavior of quintessence like dark energy.

scholarly journals Study of the anomalous acceleration of Pioneer 10 and 11

2002 ◽  
Vol 65 (8) ◽  
Author(s):  
John D. Anderson ◽  
Philip A. Laing ◽  
Eunice L. Lau ◽  
Anthony S. Liu ◽  
Michael Martin Nieto ◽  
...  
Keyword(s):  
Anomalous Acceleration ◽  
Pioneer 10

scholarly journals Remark on ``Indication, from Pioneer 10/11, Galileo, and Ulysses Data, of an Apparent Anomalous, Weak, Long-Range Acceleration''

2019 ◽  
Author(s):  
Rainer Kühne
Keyword(s):  
Long Range ◽  
Common Origin ◽  
Asteroid Belt ◽  
Anomalous Acceleration ◽  
The Common ◽  
Pioneer 10

Recently, Anderson et al. presented possible evidence for an anomalous acceleration acting on spacecrafts. Furthermore, the motions of several planets and comets are known to experience unexplained disturbances. A transneptunian comet or asteroid belt might be the common origin of these anomalies.

scholarly journals A STUDY OF THE PIONEER ANOMALY: NEW DATA AND OBJECTIVES FOR NEW INVESTIGATION

2006 ◽  
Vol 15 (01) ◽  
pp. 1-55 ◽  
Author(s):  
SLAVA G. TURYSHEV ◽  
VIKTOR T. TOTH ◽  
LARRY R. KELLOGG ◽  
EUNICE L. LAU ◽  
KYONG J. LEE
Keyword(s):  
Current Knowledge ◽  
Doppler Frequency ◽  
Blue Shift ◽  
Data Sets ◽  
Pioneer Anomaly ◽  
Doppler Data ◽  
History Of ◽  
Anomalous Acceleration ◽  
Pioneer 10

The Pioneer 10/11 spacecraft yielded the most precise navigation in deep space to date. However, their radiometric 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 × 10-9 Hz/s and can be interpreted as a constant sunward acceleration of each particular spacecraft of aP = (8.74±1.33) × 10-10 m/s 2 (or, alternatively, a time acceleration of at = (2.92±0.44) × 10-18 s/s 2). This signal has become known as the Pioneer anomaly; the nature of this anomaly remains unexplained. We discuss the current state of the efforts to retrieve the entire data sets of the Pioneer 10 and 11 radiometric Doppler data. We also report on the availability of recently recovered telemetry files that may be used to reconstruct the engineering history of both spacecraft using original project documentation and newly developed software tools. We discuss possible ways to further investigate the discovered effect using these telemetry files in conjunction with the analysis of the much extended Pioneer Doppler data. In preparation for this new upcoming investigation, we summarize the current knowledge of the Pioneer anomaly and review some of the mechanisms proposed for its explanation. We emphasize the main objectives of this new study, namely (i) analysis of the early data that could yield the true direction of the anomaly and thus, its origin, (ii) analysis of planetary encounters, which should say more about the onset of the anomaly (e.g. Pioneer 11's Saturn flyby), (iii) analysis of the entire dataset, which should lead to a better determination of the temporal behavior of the anomaly, (iv) comparative analysis of individual anomalous accelerations for the two Pioneers with the data taken from similar heliocentric distances, (v) the detailed study of on-board systematics, and (vi) development of a thermal-electric-dynamical model using on-board telemetry. The outlined strategy may allow for a higher accuracy solution for the anomalous acceleration of the Pioneer spacecraft and, possibly, will lead to an unambiguous determination of the origin of the Pioneer anomaly.

scholarly journals Conventional forces can explain the anomalous acceleration of Pioneer 10

2003 ◽  
Vol 67 (8) ◽  
Author(s):  
Louis K. Scheffer
Keyword(s):  
Anomalous Acceleration ◽  
Pioneer 10

scholarly journals Conformal Cosmology and the Pioneer Anomaly

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Gabriele U. Varieschi
Keyword(s):  
Cosmological Parameters ◽  
Hubble Constant ◽  
Conformal Gravity ◽  
Conformal Cosmology ◽  
Pioneer Anomaly ◽  
Radio Signals ◽  
Anomalous Acceleration ◽  
Near Future ◽  
Pioneer 10

We review the fundamental results of a new cosmological model, based on conformal gravity, and apply them to the analysis of the early data of the Pioneer anomaly. We show that our conformal cosmology can naturally explain the anomalous acceleration of the Pioneer 10 and 11 spacecrafts, in terms of a local blueshift region extending around the solar system and therefore affecting the frequencies of the navigational radio signals exchanged between Earth and the spacecraft. By using our model, we explain the numerical coincidence between the value of the anomalous acceleration and the Hubble constant at the present epoch and also confirm our previous determination of the cosmological parameters γ∼10−28 cm−1 and δ~10-4–10-5. New Pioneer data are expected to be publicly available in the near future, which might enable more precise evaluations of these parameters.

THE LIGHT SPEED AND THE INTERPLAY OF THE QUANTUM VACUUM, THE GRAVITATION OF ALL THE UNIVERSE AND THE FOURTH HEISENBERG RELATION

2003 ◽  
Vol 12 (09) ◽  
pp. 1755-1762 ◽  
Author(s):  
ANTONIO F. RAÑADA
Keyword(s):  
Fine Structure ◽  
Structure Constant ◽  
Fine Structure Constant ◽  
Quantum Vacuum ◽  
Proposed Model ◽  
Anomalous Acceleration ◽  
Heisenberg Relation ◽  
The Universe ◽  
Observational Signature ◽  
Pioneer 10

A recently proposed model which accounts for the observed time dependence of the fine structure constant is summarized. The model is based on the combined effect of the fourth Heisenberg relation and the gravitation of all the expanding universe on the quantum vacuum. As is shown here, it predicts that the light must have now an acceleration close to H0c≃6.9×10-10 m/s2. This suggests an explanation of the anomalous acceleration aP≃8.5×10-10 m/s2 found in the Pioneer 10 spacecraft, because an acceleration of light has the same radio observational signature as an acceleration of the ship.

A model for the pioneer anomaly

2009 ◽  
Vol 87 (10) ◽  
pp. 1089-1093 ◽  
Author(s):  
Ivan G. Avramidi ◽  
Guglielmo Fucci
Keyword(s):  
General Relativity ◽  
Test Particles ◽  
Pioneer Anomaly ◽  
Modified Theory Of Gravity ◽  
Anomalous Acceleration ◽  
Theory Of Gravity ◽  
Modified Theory ◽  
Pioneer 10

In a previous work, we showed that massive test particles exhibit a nongeodesic acceleration in a modified theory of gravity obtained by a noncommutative deformation of General Relativity (so-called Matrix Gravity). We propose that this nongeodesic acceleration might be the origin of the anomalous acceleration experienced by the Pioneer 10 and Pioneer 11 spacecrafts.

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