Modified gradiometer technique applied to Double Star (TC-1)

Georgescu, E.; Auster, H. U.; Takada, T.; Gloag, John; Eichelberger, Hans; Fornacon, K. H.; Brown, P.; Carr, C.; Zhang, T.L.

doi:10.1016/j.asr.2008.01.014

Cited by 16 publications

(10 citation statements)

References 11 publications

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“…2.4). A recent example when a highly sophisticated use of the dual magnetometer (or gradiometer) technique that was applied to the magnetic field investigation on a magnetospheric spacecraft (TC-1 of the Double Star mission) was presented by Georgescu et al (2008).…”

Section: Magnetic Background Magnetic Cleanlinessmentioning

confidence: 99%

Planetary Magnetic Field Measurements: Missions and Instrumentation

Balogh

2010

Space Sci Rev

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The nature and diversity of the magnetic properties of the planets have been investigated by a large number of space missions over the past 50 years. It is clear that without the magnetic field measurements that have been carried out in the vicinity of all the planets, the state of their interior and their evolution since their formation would not be understood even though questions remain about how the different planetary dynamos (in six of the eight planets) work. This paper describes the motivation for making magnetic field measurements, the instrumentation that has been used and many of the missions that carried out the pioneering observations. Emphasis is given to the historically important early missions even if the results from these have been in some cases bettered by later missions.Keywords Planetary magnetism · Planetary space missions · Space magnetometers Motivation for Measuring the Magnetic Field of Planets and SatellitesThe presence or absence of a planetary scale magnetic field places a strong constraint of the state of a planet's interior. The nature of the field (dipolar, multipolar, crustal, induced or, in general, the combination of all such terms in different proportions) provides further indication of the details of the thermal evolution and current state and has been used extensively in constraining models of planetary structure. If a planet's magnetic field is dominated by dipolar and low-order multipolar terms, the presumed existence of a magnetohydrodynamic dynamo in the planet's interior is an additional, important factor in its internal dynamics.For planets in the solar system, the interaction of the planetary obstacle with the allpervasive solar wind critically influences the magnetic environment of planets. The interaction depends strongly on the nature of the magnetism of the planetary body, as well as on

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Section: Magnetic Background Magnetic Cleanlinessmentioning

confidence: 99%

Planetary Magnetic Field Measurements: Missions and Instrumentation

Balogh

2010

Space Sci Rev

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“…The magnetic field data are able to be 'cleaned' by analyzing the difference between the fields measured by two magnetometers. Similar method has been used in the missions where it is difficult to implement boom for magnetometer or carry magnetic cleanliness of the spacecraft (Georgescu et al, 2008, Pope et al, 2011, Constantinescu et al, 2020.…”

Section: Msa Magnetic Field Observationmentioning

confidence: 99%

“…When studying the origin and evolution of the Earth and the Moon, it is essential to treat the two bodies together as the Earth-Moon system, because lunar explorations and analyses of the returned Apollo and Luna samples and meteorites have revealed a history of Earth-Moon co-evolution (e.g., Taylor et al 2006). The results of these studies have led to the theory of a giant impact on the birth of the Moon (Canup & Asphang, 2001) and the transport of the early Earth's atmosphere to the Moon (Ozima et al, 2005;2008). The Earth's atmosphere currently leaks into space (Seki et al, 2001) and some of them have been implanted inside the lunar surface materials since billions of years ago (Terada et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

In Situ Observations of Ions and Magnetic Field Around Phobos: The Mass Spectrum Analyzer (MSA) for the Martian Moons eXploration (MMX) Mission

Yokota¹,

Terada²,

Matsuoka³

et al. 2020

Preprint

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The Mass Spectrum Analyzer (MSA) will perform in-situ observations of ions and magnetic fields around Phobos as part of the Martian Moons eXploration (MMX) mission to investigate the origin of the Martian moons and physical processes in the Martian environment. MSA consists of an ion energy mass spectrometer and two magnetometers which will measure velocity distribution functions and mass/charge distributions of low-energy ions and magnetic field vectors, respectively. For the MMX scientific objectives, MSA will observe solar wind ions, those scattered at the Phobos surface, water-related ions generated in the predicted Martian gas torus, secondary ions sputtered from Phobos, and escaping ions from the Martian atmosphere, while monitoring the surrounding magnetic field. MSA will be developed from previous instruments for space plasma missions such as Kaguya, Arase, and BepiColombo/Mio to contribute to the MMX scientific objectives.

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“…This introduces constrains on the spacecraft operations and still requires a certain degree of magnetic cleanliness of the spacecraft in order to keep the boom at a reasonable length. A third way is to accept the presence of spacecraft-generated disturbances in the measured magnetic field and to remove the artificial contributions afterwards on board or on the ground through special techniques (Mehlem, 1978;Georgescu et al, 2008;Pope et al, 2011). An extreme case where neither magnetic cleanliness nor boom was provided is, for example, the magnetic field O. D. Constantinescu et al: Removing disturbances from magnetic field data experiment on the MASCOT lander (Herčík et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Maximum-variance gradiometer technique for removal of spacecraft-generated disturbances from magnetic field data

Constantinescu

Auster²,

Delva

et al. 2020

Geosci. Instrum. Method. Data Syst.

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Abstract. In situ measurement of the magnetic field using spaceborne instruments requires a magnetically clean platform and/or a very long boom for accommodating magnetometer sensors at a large distance from the spacecraft body. This significantly drives up the costs and the time required to build a spacecraft. Here we present an alternative sensor configuration and a technique allowing for removal of the spacecraft-generated AC disturbances from the magnetic field measurements, thus lessening the need for a magnetic cleanliness programme and allowing for shorter boom length. The final expression of the corrected data takes the form of a linear combination of the measurements from all sensors, allowing for simple onboard software implementation. The proposed technique is applied to the Service Oriented Spacecraft Magnetometer (SOSMAG) on board the Korean geostationary satellite GeoKompsat-2A (GK2A). In contrast to other missions where multi-sensor measurements were used to clean the data on the ground, the SOSMAG instrument performs the cleaning on board and transmits the corrected data in real time, as needed by space weather applications. The successful elimination of the AC disturbances originating from several sources validates the proposed cleaning technique.

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Modified gradiometer technique applied to Double Star (TC-1)

Cited by 16 publications

References 11 publications

Planetary Magnetic Field Measurements: Missions and Instrumentation

Planetary Magnetic Field Measurements: Missions and Instrumentation

In Situ Observations of Ions and Magnetic Field Around Phobos: The Mass Spectrum Analyzer (MSA) for the Martian Moons eXploration (MMX) Mission

Maximum-variance gradiometer technique for removal of spacecraft-generated disturbances from magnetic field data

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