Results 11 to 20 of about 120,510 (265)

On the mean anomaly and the mean longitude in tests of post-Newtonian gravity

open access: yesEuropean Physical Journal C: Particles and Fields, 2019
The distinction between the mean anomaly $${\mathcal {M}}(t)$$ M(t) and the mean anomaly at epoch $$\eta $$ η , and the mean longitude l(t) and the mean longitude at epoch $$\epsilon $$ ϵ is clarified in the context of a their possible use in post ...
Lorenzo Iorio
doaj   +1 more source

Discussion on the orthometric height realization

open access: yesGeodesy and Cartography, 2012
In the theory of the orthometric height, the mean value of gravity along the plumbline between the geoid and the earth's surface is defined as the integral mean. To determine the mean gravity from the gravity observations realized at the physical surface
Robert Tenzer
doaj   +1 more source

Improved analysis of all-sky meteor radar measurements of gravity wave variances and momentum fluxes [PDF]

open access: yesAnnales Geophysicae, 2013
The advantages of using a composite day analysis for all-sky interferometric meteor radars when measuring mean winds and tides are widely known. On the other hand, problems arise if this technique is applied to Hocking's (2005) gravity wave analysis ...
V. F. Andrioli   +3 more
doaj   +1 more source

Inertia, gravity and the meaning of mass

open access: yesPhysica Scripta, 2023
Abstract Our concept of mass has evolved considerably over the centuries, most notably from Newton to Einstein, and then even more vigorously with the establishment of the standard model and the subsequent discovery of the Higgs boson. Mass is now invoked in various guises depending on the circumstance: it is used to represent inertia ...
openaire   +2 more sources

Cumulative versus Gravity-based Accessibility Measures: Which One to Use?

open access: yesFindings, 2022
This paper compares two popular approaches to calculate access to jobs by public transport: gravity and cumulative opportunities. Using data on commute patterns and public transport schedules from Montreal, Canada, we find cumulative opportunities-based ...
Manuel Santana Palacios   +1 more
doaj   +1 more source

Long-term MST radar observations of vertical wave number spectra of gravity waves in the tropical troposphere over Gadanki (13.5° N, 79.2° E): comparison with model spectra [PDF]

open access: yesAnnales Geophysicae, 2008
The potential utility of Mesosphere-Stratosphere-Troposphere (MST) radar measurements of zonal, meridional and vertical winds for divulging the gravity wave vertical wave number spectra is discussed. The data collected during the years 1995–2004
A. Narendra Babu   +5 more
doaj   +1 more source

Monthly gravity field recovery from GRACE orbits and K-band measurements using variational equations approach

open access: yesGeodesy and Geodynamics, 2015
The Gravity Recovery and Climate Experiment (GRACE) mission can significantly improve our knowledge of the temporal variability of the Earth's gravity field.
Changqing Wang   +3 more
doaj   +1 more source

Determining mean and standard deviation of the strong gravity prior through simulations.

open access: yesPLoS ONE, 2020
Humans expect downwards moving objects to accelerate and upwards moving objects to decelerate. These results have been interpreted as humans maintaining an internal model of gravity.
Björn Jörges, Joan López-Moliner
doaj   +1 more source

Long-term lidar observations of wintertime gravity wave activity over northern Sweden [PDF]

open access: yesAnnales Geophysicae, 2014
This paper presents an analysis of gravity wave activity over northern Sweden as deduced from 18 years of wintertime lidar measurements at Esrange (68° N, 21° E).
B. Ehard   +4 more
doaj   +1 more source

Accuracy Evaluation of Altimeter-Derived Gravity Field Models in Offshore and Coastal Regions of China

open access: yesFrontiers in Earth Science, 2021
Satellite radar altimetry has made unique contributions to global and coastal gravity field recovery. This paper starts with a general introduction followed by the progress of satellite radar altimetry technology.
Qianqian Li   +5 more
doaj   +1 more source

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