Open AccessJournal Article
Doppler tracking of spacecraft with multi-frequency links
TLDR
In this article, the authors discuss the use of multi-frequency microwave links in Doppler tracking of interplanetary spacecraft for scientific purposes, especially in relation to the measurement and the elimination of the contribution due to the plasma in the solar wind and the ionosphere.Abstract:
We discuss the use of multi-frequency microwave links in Doppler tracking of interplanetary spacecraft for scientific purposes, especially in relation to the measurement and the elimination of the contribution due to the plasma in the solar wind and the ionosphere We show how the two contributions in the up- and the down-link can be separately measured with a five links scheme; for the ordinary case in which we have two carriers in the down-link, but only one in the up-link, (for which the plasma contribution can be directly measured only for the former) we find the optimum algorism for computing the latter contribution We also discuss in detail Doppler measurements near opposition, which can provide information on the dynamics of the turbulence in the solar wind and, in particular, study the dispersion of its modesread more
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Journal ArticleDOI
A test of general relativity using radio links with the Cassini spacecraft
TL;DR: A measurement of the frequency shift of radio photons to and from the Cassini spacecraft as they passed near the Sun agrees with the predictions of standard general relativity with a sensitivity that approaches the level at which, theoretically, deviations are expected in some cosmological models.
Journal ArticleDOI
Spacecraft Doppler tracking: Noise budget and accuracy achievable in precision radio science observations
TL;DR: In this paper, a detailed noise model for Doppler radio science experiments is presented. But the model focuses primarily on the Fourier range ≈10−4-1 Hz, but the authors briefly discuss noise in lower-frequency observations.
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Measurement of Jupiter’s asymmetric gravity field
Luciano Iess,W. M. Folkner,Daniele Durante,Marzia Parisi,Yohai Kaspi,Eli Galanti,Tristan Guillot,William B. Hubbard,D. J. Stevenson,John D. Anderson,Dustin Buccino,L. Gomez Casajus,Andrea Milani,Ryan S. Park,P. Racioppa,Daniele Serra,Paolo Tortora,Marco Zannoni,Hao Cao,Ravit Helled,Jonathan I. Lunine,Yamila Miguel,Burkhard Militzer,S. M. Wahl,John E. P. Connerney,Steven Levin,Scott Bolton +26 more
TL;DR: Measurements of Jupiter’s gravity harmonics are reported through precise Doppler tracking of the Juno spacecraft in its polar orbit around Jupiter, finding a north–south asymmetry, which is a signature of atmospheric and interior flows.
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Testing general relativity with the BepiColombo radio science experiment
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Cassini radio science
Arvydas J. Kliore,John D. Anderson,John W. Armstrong,S. W. Asmar,C. L. Hamilton,Nicole J. Rappaport,Hugo D. Wahlquist,R. Ambrosini,F. M. Flasar,Richard G. French,Luciano Iess,Essam A. Marouf,Andrew F. Nagy +12 more
TL;DR: Cassini radio science investigations will be conducted both during the cruise (gravitational wave and conjunction experiments) and the Saturnian tour of the mission (atmospheric and ionospheric occultations, ring occultation, determinations of masses and gravity fields) as mentioned in this paper.
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