Microgravitation in space

Marussi, Antonio

doi:10.1111/j.1365-246x.1984.tb01917.x

Cited by 8 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The by far greatest effect, that of the attraction of the spherical Earth, is eliminated leading to a significant accentuation of the small effects produced by mountains and valleys and all other density variations on and inside the Earth. Antonio Marussi (1908Marussi ( -1984, a great geophysicist and geodesist, in a series of wonderful papers explained that these acceleration differences correspond to the curvatures of plumb lines and level surfaces of the Earth's gravitational field at satellite altitude, see (Marussi 1979(Marussi , 1984(Marussi , 1985. This is the principle of gravitational gradiometry as it was implemented for the first time in space with ESA's dedicated gravity mission "Gravity field and steady-state Ocean Circulation Explorer" (GOCE).…”

Section: Freefall and Gravitationmentioning

confidence: 99%

Earth’s gravity from space

Rummel

2020

Rend. Fis. Acc. Lincei

View full text Add to dashboard Cite

Satellite gravimetry began with the launch of the satellites Sputnik 1 and 2 in 1957. During the following 43 years, more and more details were discovered and the models of the Earth’s gravity could be refined. Methods improved and more and more satellite orbits and ground stations were added in the analysis, employing more advanced and precise measuring techniques. A new era started with the dedicated gravimetry missions CHAMP (2000–2010), GRACE (2002–2017), and GOCE (2009–2013). The methods of satellite-to-satellite tracking and satellite gradiometry resulted in a substantial improvement of our knowledge of the Earth’s gravity field in terms of accuracy and its spatial and temporal variations. There are three basic ways of using gravity and geoid models in Earth sciences and geodesy. First, in solid Earth physics, the highs and lows of the field are investigated in comparison with an idealized Earth, e.g., a hydrostatic equilibrium figure. In particular, in South America, Africa, Himalaya and Antarctica the gravity field is known much better now, due to GOCE and lead to an improved understanding of the continental crust and lithosphere. Second, in oceanography, the geoid serves as surface in equilibrium, a hypothetical ocean at rest. The ocean topography is the deviation of the actual ocean surface, measured by satellite altimetry, from this reference. The ocean topography serves as a new and independent input to ocean circulation modeling and leads to an improved understanding of ocean transport of mass, heat, and nutrients. Similarly, geodetic heights of the land surface will soon be referred to the geoid, leading to globally consistent heights and enabling the removal of existent systematic deformations and offsets of national and continental height systems. Third, the GRACE time series of monthly gravity models, reflecting seasonal, inter-annual and long-term gravity changes, became one of the most valuable data sources of climate change studies.

show abstract

Section: Freefall and Gravitationmentioning

confidence: 99%

Earth’s gravity from space

Rummel

2020

Rend. Fis. Acc. Lincei

View full text Add to dashboard Cite

show abstract

“…Pioneer works about satellite gradiometry are [16] about GRADIO or [17] or more generally in Rummel [18,19], Marussi [20], Hotine [15] and others. The first satellite mission equipped by a gradiometer (differential micro-accelerometer) was GOCE [6].…”

Section: Theory Data and Computationsmentioning

confidence: 99%

Gravity Disturbances, Marussi Tensor, Invariants and Other Functions of the Geopotential Represented by EGM 2008

Klokočník¹,

Kostelecký

Kalvoda

et al. 2014

JESR

View full text Add to dashboard Cite

Gravity disturbances, the Marussi tensor, invariants of the gravity field, their certain ratio and other functions of the geopotential (including newly defined "virtual deformations") are computed based on the harmonic coefficients of the global gravitational field model EGM 2008. Regional examples of correlations of large-scale morphotectonic and landform patterns with some aspects of the geopotential as computed from the EGM 2008 are presented. It is suggested that morphotectonic and landform patterns with very conspicuous combinations of significantly high positive or negative values of Γ 33 are under the strong influence of rapid and/or intensive geomorphic processes. These geophysical signatures supported by values of the strike angle θ S and virtual dilatations or compressions of the ellipse of deformation reflect the regional dynamics of Earth surface evolution as characterised by very effective integration of tectonic and climate-driven morphogenetic processes.

show abstract

The Motion of a Free Particle and of a Spherical Pendulum in the Microgravitational Field of a Gravitationally Stabilized Satellite in Circular Orbit in a Central Field

Marussi

Chiaruttini

1985

Intrinsic Geodesy

View full text Add to dashboard Cite

Microgravitation in space

Cited by 8 publications

References 1 publication

Earth’s gravity from space

Earth’s gravity from space

Gravity Disturbances, Marussi Tensor, Invariants and Other Functions of the Geopotential Represented by EGM 2008

The Motion of a Free Particle and of a Spherical Pendulum in the Microgravitational Field of a Gravitationally Stabilized Satellite in Circular Orbit in a Central Field

Contact Info

Product

Resources

About