G�od�sie terrestre et g�od�sie par satellites

Kovalevsky, J.; Barlier, F.

doi:10.1007/bf00173116

Cited by 6 publications

(2 citation statements)

References 31 publications

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“…Alternatively, they may not exist when 90 • in these intervals. Multiple sampling directions are required simultaneously to answer this question unambiguously, such as those planned for NASA's Helioswarm mission (Klein et al 2019(Klein et al , 2023.…”

Section: Resultsmentioning

confidence: 99%

Spectral break of the density power spectrum in solar wind turbulence

Roberts,

Narita,

Nakamura

et al. 2023

A&A

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We use density measurements deduced from spacecraft potential to study the power spectral density (PSD) of compressive fluctuations in the solar wind. Typically, plasma measurements do not have a sufficiently high time resolution to resolve density fluctuations down to ion kinetic scales. However, the calibrated spacecraft potential allows for much higher time resolutions to resolve the spectral break between ion inertial and kinetic ranges. We used fast-survey mode data from Magnetospheric MultiScale when the spacecrafts were in the pristine solar wind. The density spectra’s morphology differs from the trace magnetic field fluctuations, with a flattening often occurring between inertial and kinetic ranges. We find that the spectral break of the trace magnetic field fluctuations occurs near the expected frequency for cyclotron resonance or magnetic reconnection. Meanwhile, the spectral break at the start of the ion kinetic range for density fluctuations is often at a higher frequency when compared to the trace magnetic field. We discuss possible interpretations for these observations.

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Section: Resultsmentioning

confidence: 99%

Spectral break of the density power spectrum in solar wind turbulence

Roberts,

Narita,

Nakamura

et al. 2023

A&A

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show abstract

“…It was not long after the laser was invented at the end of the 1950s that it started being used from space to sense the surface of Earth satellites and other planets (Arnold, 1967;Kovalevsky and Barlier, 1967). The principle of the geodetic laser scanning is simple (e.g., Baltsavias, 1999;Carter et al, 2007) (Figure 7).…”

Section: Geodetic Scanning Lasermentioning

confidence: 99%