Author pages are created from data sourced from our academic publisher partnerships and public sources.
- Publications
- Influence
Modelling of the ring current in Saturn's magnetosphere
- G. Giampieri, M. Dougherty
- Physics
- 2004
Abstract. The existence of a ring current inside Saturn's magnetosphere was first suggested by Smith et al. (1980) and Ness et al. (1981, 1982), in order to explain various features in the magnetic… Expand
A regular period for Saturn's magnetic field that may track its internal rotation
- G. Giampieri, M. Dougherty, E. Smith, C. Russell
- Physics, Medicine
- Nature
- 4 May 2006
The rotation rate of a planet is one of its fundamental properties. Saturn's rotation, however, is difficult to determine because there is no solid surface from which to time it, and the alternative… Expand
Cassini Magnetometer Observations During Saturn Orbit Insertion
- M. Dougherty, N. Achilleos, +15 authors B. Tsurutani
- Physics, Medicine
- Science
- 25 February 2005
Cassini's successful orbit insertion has provided the first examination of Saturn's magnetosphere in 23 years, revealing a dynamic plasma and magnetic environment on short and long time scales. There… Expand
A Hidden Markov Model of Default Interaction
- M. Crowder, M. Davis, G. Giampieri
- Computer Science
- 2003
TLDR
- 41
- 6
- PDF
Rotation rate of Saturn's interior from magnetic field observations
- G. Giampieri, M. Dougherty
- Physics
- 1 August 2004
[1] Analysis of magnetic field data from the Pioneer 11, Voyager 1 and Voyager 2 spacecraft produced the first models of Saturn's internal field. One striking feature of these models is the lack of… Expand
Doppler Measurements of the Quadrupole Moments of Titan
- N. Rappaport, B. Bertotti, G. Giampieri, J. Anderson
- Physics
- 1 April 1997
Abstract Measurements of the Doppler frequency change in a microwave beam sent to and transponded back from an interplanetary spacecraft are very sensitive to the quadrupole gravitational field of a… Expand
Modelling of magnetic field measurements at Mercury
- G. Giampieri, A. Balogh
- Physics
- 1 December 2001
Abstract Mapping Mercury's internal magnetic field with a magnetometer in closed orbit around the planet will provide valuable information about its internal structure. By measuring magnetic field… Expand
Cassini observations of planetary‐period magnetic field oscillations in Saturn's magnetosphere: Doppler shifts and phase motion
- S. Cowley, D. Wright, +5 authors T. R. Robinson
- Physics
- 1 April 2006
[1] Cassini magnetic field observations show that few-nT oscillations near the planetary rotation period, first observed in Pioneer-11 and Voyager-1 and -2 fly-by data, are essentially ubiquitous in… Expand
Estimating Mercury's 88-day libration amplitude from orbit
- R. Jehn, C. Corral, G. Giampieri
- Physics
- 1 July 2004
In this paper it is derived that the libration of Mercury can be described by � = � 0 sin M + � 0=K sin 2M where � 0 is the unknown libration amplitude, M is Mercury’s mean anomaly and K = −9:483. �… Expand
Measurement of the PPN Parameter (gamma) with radio signals from the Cassini Spacecraft at X- and Ka-Bands
- J. Anderson, E. Lau, G. Giampieri
- Physics
- 13 December 2005
Radio Doppler data from the Cassini spacecraft during its solar conjunction in June 2002 can be used to measure the bending of light by solar gravitation. In terms of the standard post-Newtonian… Expand
- 12
- 2