MAGSAT--A new satellite to survey the earth's magnetic field

Mobley, F. F.; Eckard, L. D.; Fountain, Glen H.; Ousley, G. W.

doi:10.1109/tmag.1980.1060781

Cited by 27 publications

(9 citation statements)

References 4 publications

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“…Another method, using an optical Attitude Transfer System between the spacecraft body and the magnetometer platform was used on the Magsat mission, as described in Sect. 3.4 (Mobley et al 1980). In addition, star cameras were used on the spacecraft for determining the attitude of the spacecraft accurately.…”

Section: Magnetometer Calibrationmentioning

confidence: 96%

“…Magsat was the first spacecraft dedicated by NASA to the study of the Earth's magnetic field (Mobley et al 1980;Langel et al 1982). The spacecraft carried both a scalar and a vector magnetometer.…”

Section: The Earthmentioning

confidence: 99%

“…35. Hence a complex Attitude Transfer System (ATS) was designed to implement the requirements (Mobley et al 1980). A further requirement on the boom was to ensure that the ATS remained in its linear range for the determination of the orientation of the vector measurements.…”

Section: The Earthmentioning

confidence: 99%

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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: Magnetometer Calibrationmentioning

confidence: 96%

Section: The Earthmentioning

confidence: 99%

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Planetary Magnetic Field Measurements: Missions and Instrumentation

Balogh

2010

Space Sci Rev

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“…However, it was soon recognized that vector magnetic field measurements are required in order to accurately map the magnetic field in the equatorial region. In 1979/1980, Magsat was the first satellite to carry an accurate vector magnetometer with attitude determination using a star imager (Mobley et al, 1980). Following a period of 20 years without accurate satellite magnetic coverage from space, the CHAMP satellite was launched in July 2000 (Reigber et al, 2002).…”

Section: The Satellite Perspectivementioning

confidence: 99%

EMAG3: A 3‐arc‐minute resolution global magnetic anomaly grid compiled from satellite, airborne and marine magnetic data

Maus

Fairhead

Mogren

et al. 2008

SEG Technical Program Expanded Abstracts 2008

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NOAA's National Geophysical Data Center (NGDC) has extensive holdings of airborne and marine magnetic data. Such data have been collected for more than half a century, providing global coverage of the Earth. Due to the changing main field from the Earth's core, and due to differences in quality and coverage, combining these data to a consistent global magnetic anomaly grid is challenging. A key ingredient is the long wavelength magnetic field observed by the low-orbiting CHAMP satellite. To produce a homogeneous grid, the marine and aeromagnetic trackline data are first line-leveled and then merged with the existing grids of continental-scale compilations by Least Squares Collocation. In the final processing step the short-to-intermediate wavelengths of the near-surface grid are merged with a CHAMP satellite magnetic anomaly model. In analogy to NGDC's 2-arcminute resolution ETOPO2 grid, we call our initial 3-arcminute magnetic anomaly grid EMAG3. The grid will be updated regularly. It is available in digital form and as plug-ins for NASA World Wind and Google Earth.

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“…There were no global high-precision measurements of 35 the Earth's magnetic field until the launch of the OGO-2 satellite in 1965, though this satellite only measured the magnetic intensity at altitudes from 400 km to 1510 km [Cain and Langel, 1971]. The MAGSAT is the first global magnetic vector survey satellite, which operated for about six month form November 1979 to April 1980 [Mobley et al, 1980]. It was about 20 years after the MAGSAT mission the more recent and high precision global magnetic satellite observations became available: the ørsted satellite [Olsen, 2007], CHAMP [Maus, 2007], and SAC-C [Stauning, 2003] carried nearly the same 40 instrumentation and provided over a decade unique geomagnetic data sets, which were used for establishing a lot of geomagnetic models [e.g.…”

mentioning

confidence: 99%

The Fluxgate Magnetometer of the Low Orbit Pearl Satellites (LOPS): overview of in-flight performance and initial results

Zhu¹,

Du²,

Luo³

et al. 2021

Preprint

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Abstract. The Low Orbit Pearl Satellite series consists of six constellations, with each constellation consisting of three identical micro-satellites which line up just like a string of pearls. The first constellation of three satellites were launched on September 29, 2017, with an inclination of ~ 35.5° and ~ 600 km altitude. Each satellite is equipped with three identical Fluxgate Magnetometers (FGM), which measure the in-situ magnetic field and its low frequency fluctuations in the Earth’s low altitude orbit. The triple sensor configuration enables separation of stray field effects generated by the spacecraft from the ambient magnetic field [e.g. Zhang et al., 2006]. This paper gives a general description of the magnetometer about the instrument design, calibration before launch, in flight calibration, as well as the in-flight performance and initial results. Unprecedented spatial coverage resolution of the magnetic field measurements allow for investigating the dynamic processes and electric currents of ionosphere and magnetosphere, especially for the ring current and equatorial electrojet (EEJ) during both geomagnetic quiet conditions and storms. It could be important for studying the method to separate their contributions of the M-I current system.

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MAGSAT--A new satellite to survey the earth's magnetic field

Cited by 27 publications

References 4 publications

Planetary Magnetic Field Measurements: Missions and Instrumentation

Planetary Magnetic Field Measurements: Missions and Instrumentation

EMAG3: A 3‐arc‐minute resolution global magnetic anomaly grid compiled from satellite, airborne and marine magnetic data

The Fluxgate Magnetometer of the Low Orbit Pearl Satellites (LOPS): overview of in-flight performance and initial results

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