Results 41 to 50 of about 269 (142)
Miniaturized Mechanical Antennas: Advances, Challenges, and Future Directions
Advanced Physics Research, Volume 4, Issue 1, January 2025.Miniaturized mechanical antennas generate electromagnetic waves by mechanical movement of magnetoelectric materials, permanent magnets, electrets, or piezoelectric materials, and have dimensions several orders of magnitude smaller than their electrical compartments.
Hao Ren
wiley +1 more source
External calibration of GOCE data using regional terrestrial gravity data
Geodesy and Geodynamics, 2012 This paper reports on a study of the methodology of external calibration of GOCE data, using regional terrestrial-gravity data. Three regions around the world are selected in the numerical experiments. The result indicates that this calibration method is
Wu Yunlong +3 more
doaj +1 more source
Space Weather, Volume 23, Issue 1, January 2025.Abstract The navigation and radio communication systems experience significant disruptions due to post‐sunset equatorial ionospheric irregularities. There is ongoing debate regarding the impact of meridional/trans‐equatorial wind speed on these irregularities, though it is widely agreed that the Pre‐Reversal Enhancement (PRE) plasma vertical drift ...
Bantayehu Aderaw, Melessew Nigussie
wiley +1 more source
GOCE, la Ferrari dei satelliti
GEOmedia, 2009 GOCE, a "Ferrari" between satellites GOCE is a new exciting European Space Agency mission within the Living Earth programme. The design of the satellite and its sensor, the Electrostatic Gravity Gradiometer, are intimately linked to produce the most ...
Fabrizio Bernardini
doaj +2 more sources
Archaeological Prospection, Volume 31, Issue 4, Page 403-418, October/December 2024.Abstract Part of Canadian history that is now being addressed is the legacy of Indian residential schools (IRSs) and closely related institutions. For most of their 200‐year‐plus history, these were run by various churches or religious organizations, and many were directly funded (and eventually run) by government.
Brian Whiting
wiley +1 more source
Comparison of numerical solution strategies for gravity field recovery from GOCE SGG observations implemented on a parallel platform [PDF]
Advances in Geosciences, 2003 The recovery of a full set of gravity field parameters from satellite gravity gradiometry (SGG) is a huge numerical and computational task. In practice, parallel computing has to be applied to estimate the more than 90 000 harmonic coefficients ...
R. Pail, G. Plank
doaj
On the computation of crustal induced gravity signal at a typical low Earth orbiter altitude
Journal of Geodetic Science, 2012 The recent release of crustal digital databases, which offer in a global unified resolution the structure (geometry) and consistency (density)of a distinct number of layers stretching from the variations of the visible topography and bathymetry ...
Tsoulis D., Venesis C.
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The Benefits of Future Quantum Accelerometers for Satellite Gravimetry
Earth and Space Science, Volume 11, Issue 9, September 2024.Abstract We investigate the benefits of future quantum accelerometers based on cold atom interferometry (CAI) on current and upcoming satellite gravity mission concepts. These mission concepts include satellite‐to‐satellite tracking (SST) in a single‐pair (GRACE‐like) and double‐pair constellation as well as satellite gravity gradiometry (SGG, single ...
P. Zingerle +6 more
wiley +1 more source
Performance Evaluation and Requirements Assessment for Gravity Gradient Referenced Navigation
Sensors, 2015 In this study, simulation tests for gravity gradient referenced navigation (GGRN) are conducted to verify the effects of various factors such as database (DB) and sensor errors, flight altitude, DB resolution, initial errors, and measurement update rates
Jisun Lee, Jay Hyoun Kwon, Myeongjong Yu
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Archaeological Prospection, Volume 31, Issue 3, Page 267-287, July/September 2024.ABSTRACT Archaeological prospection is continually expanding into new frontiers, examining increasingly large areas, diverse environmental contexts and varying site types. One area that has received only limited focus is historic battlefields. This paper presents results from large‐scale geophysical surveys (> 100 ha) at the Napoleonic battlefield of ...
Duncan Williams +5 more
wiley +1 more source