An ellipsoidal harmonic representation of Earth's lithospheric magnetic field to degree and order 720

Maus, Stefan

doi:10.1029/2010gc003026

Cited by 108 publications

(85 citation statements)

References 26 publications

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“…The main field at PALA was estimated by using the global Enhanced Magnetic Model (EMM) up to degree and order 15. This geomagnetic model up to degree of 720 is derived from ground, satellite, marine and aeromagnetic data (Maus, 2010), and the lithospheric field in this model is described by degrees and orders of 16-720.…”

Section: Methods Of Analysismentioning

confidence: 99%

Recent geomagnetic investigations of Palagruža island

2017

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Intention of this work was to examine all available recent geomagnetic survey data, in order to assess Palagruža as a potential location for a permanent variometer station. The most recent data consist of absolute, total intensity vertical gradients and Overhauser effect dIdD vector measurements, carried out in period 2008-2010. Evidences were found in low crustal field estimates, relatively low total field vertical gradient distribution over the island, quite high time series correlation with the near observatories, as well as in low noise level of geomagnetic components. These preliminary results indicate Palagruža as appropriate location for the repeat station as well as for the variometer station. However, additional investigations of the geomagnetic sea and coastal effects by using much longer time series are needed.

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Section: Methods Of Analysismentioning

confidence: 99%

Recent geomagnetic investigations of Palagruža island

2017

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“…where B m is the Earth's magnetic field strength, andα and γ are the values of magnetic declination and inclination, respectively, obtained from the EMM2010 Earth magnetic model [12]. Because they are otherwise not observable, updating of the corresponding biases, b α and b γ , is only allowed when a vision-aiding measurement is available.…”

Section: A Pose Estimation Processmentioning

confidence: 99%

Development of vision-aided navigation for a wearable outdoor augmented reality system

Menozzi

Clipp

Wenger

et al. 2014

2014 IEEE/ION Position, Location and Navigation Symposium - PLANS 2014

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Abstract-This paper describes the development of visionaided navigation (i.e., pose estimation) for a wearable augmented reality system operating in natural outdoor environments. This system combines a novel pose estimation capability, a helmetmounted see-through display, and a wearable processing unit to accurately overlay geo-registered graphics on the user's view of reality. Accurate pose estimation is achieved through integration of inertial, magnetic, GPS, terrain elevation data, and computervision inputs. Specifically, a helmet-mounted forward-looking camera and custom computer vision algorithms are used to provide measurements of absolute orientation (i.e., orientation of the helmet with respect to the Earth). These orientation measurements, which leverage mountainous terrain horizon geometry and/or known landmarks, enable the system to achieve significant improvements in accuracy compared to GPS/INS solutions of similar size, weight, and power, and to operate robustly in the presence of magnetic disturbances. Recent field testing activities, across a variety of environments where these vision-based signals of opportunity are available, indicate that high accuracy (less than 10 mrad) in graphics geo-registration can be achieved. This paper presents the pose estimation process, the methods behind the generation of vision-based measurements, and representative experimental results.

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“…Unfortunately, it is also one of the weakest detectable sources at satellite altitudes and is masked by all other constituents of the total Earth's magnetic field (e.g., Hulot et al, 2007). For instance, it represents about 0.01% of the total Earth's magnetic field strength at 400 km height (with a root mean square of about 3.8 nT using the NGDC-720 model; Maus, 2010) and its magnitude rarely exceeds 20 nT.…”

Section: Introductionmentioning

confidence: 99%

Swarm SCARF Dedicated Lithospheric Field Inversion chain

Thébault

Vigneron

Maus³

et al. 2013

Earth Planet Sp

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The forthcoming Swarm satellite mission is a constellation of three satellites dedicated to the study of the geomagnetic field. The orbital characteristics of the mission, which includes a pair of satellites flying side by side, has prompted new efforts in data processing and modeling. A consortium of several research institutions has been selected by the European Space Agency (ESA) to provide a number of Level-2 data products which will be made available to the scientific community. Within this framework, specific tools have been tailor-made to better recover the lithospheric magnetic field contribution. These tools take advantage of gradient properties measured by the lower pair of Swarm satellites and rely on a regional modeling scheme designed to better detect signatures of small spatial scales. We report on a processing chain specifically designed for the Swarm mission. Using an End-to-End simulation, we show that the tools developed are operational. The chain generates a model that meets the primary scientific objectives of the Swarm mission. We also discuss refinements that could also be implemented during the Swarm operational phase to further improve lithospheric field models and reach unprecedented spatial resolution.

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An ellipsoidal harmonic representation of Earth's lithospheric magnetic field to degree and order 720

Cited by 108 publications

References 26 publications

Recent geomagnetic investigations of Palagruža island

Recent geomagnetic investigations of Palagruža island

Development of vision-aided navigation for a wearable outdoor augmented reality system

Swarm SCARF Dedicated Lithospheric Field Inversion chain

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