Long-term observations of the trapped high-energy proton population (L&lt;4) by the NOAA Polar Orbiting Environmental Satellites (POES)

Evans, David S.; Garrett, Henry; Jun, I.; Evans, R. W.; Chow, J

doi:10.1016/j.asr.2007.11.028

Cited by 35 publications

(42 citation statements)

References 2 publications

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“…The structure located between the SAA and the south horn appears also in these POES observations, as in EPT during June 2013 after a SEP event. Such band of proton precipitation at higher L in the southern hemisphere were also reported by Evans et al (2008) after two SEP With EPT, it is noted also that the appearance of these protons in location and intensity is correlated to the high energy electron flux above 2 MeV. It must be stated that the data until 24 June has been acquired during the commissioning phase of the EPT and that the EPT was not running with its optimal configuration.…”

Section: Proton Fluxesmentioning

confidence: 75%

The Energetic Particle Telescope: First Results

et al. 2014

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The Energetic Particle Telescope (EPT) is a new compact and modular ionizing particle spectrometer that was launched on 7 May 2013 to a LEO polar orbit at an altitude of 820 km onboard the ESA satellite PROBA-V. First results show electron, proton and helium ion fluxes in the South Atlantic Anomaly (SAA) and at high latitudes, with high flux increases during SEP (Solar Energetic Particles) events and geomagnetic storms. These observations help to improve the understanding of generation and loss processes associated to the Van Allen radiation belts.

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Section: Proton Fluxesmentioning

confidence: 75%

The Energetic Particle Telescope: First Results

et al. 2014

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“…MEPED energy bands of the 0° and 90° proton telescopes and omnidirectional electron and proton detectors were corrected and analysed in a similar way. Detector energy band increased the detection energy intervals of a few 10 keV due to degradation (Evans et al, 2008).…”

Section: Noaa Particle Data and Its Preparation For The Analysismentioning

confidence: 99%

Particle precipitation prior to large earthquakes of both the Sumatra and Philippine Regions: A statistical analysis

Fidani¹

2015

Journal of Asian Earth Sciences

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“…We take advantage of information provided by different satellites orbiting the Earth and carrying diverse instruments. For the particle flux studies we have used two different data sets, the proton omni-directional detections from the POES NOAA 15 satellite (Evans et al, 2008) and the dark noise data from the CALIPSO satellite (Noel et al, 2014). In order to describe the main magnetic field and the evolution of the eccentric dipole, the most recent CHAOS model, CHAOS-6, was used (Finlay et al, 2016).…”

Section: Introduction: the Particle Flux In The South Atlantic Anomalymentioning

confidence: 99%

The South Atlantic Anomaly throughout the solar cycle

Domingos

Jault

Pais

et al. 2017

Earth and Planetary Science Letters

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The Sun-Earth's interaction is characterized by a highly dynamic electromagnetic environment, in which the magnetic field produced in the Earth's core plays an important role. One of the striking characteristics of the present geomagnetic field is denoted the South Atlantic Anomaly (SAA) where the total field intensity is unusually low and the flux of charged particles, trapped in the inner Van Allen radiation belts, is maximum. Here, we use, on one hand, a recent geomagnetic field model, CHAOS-6, and on the other hand, data provided by different platforms (satellites orbiting the Earth -POES NOAA for 1998 and CALIPSO for 2006. Evolution of the SAA particle flux can be seen as the result of two main effects, the secular variation of the Earth's core magnetic field and the modulation of the density of the inner radiation belts during the solar cycle, as a function of the L value that characterises the drift shell, where charged particles are trapped. To study the evolution of the particle flux anomaly, we rely on a Principal Component Analysis (PCA) of either POES particle flux or CALIOP dark noise. Analysed data are distributed on a geographical grid at satellite altitude, based on a L-shell reference frame constructed from the moving eccentric dipole. Changes in the main magnetic field are responsible for the observed westward drift. Three PCA modes account for the time evolution related to solar effects. Both the first and second modes have a good correlation with the thermospheric density, which varies in response to the solar cycle. The first mode represents the total intensity variation of the particle flux in the SAA, and the second the movement of the anomaly between different L-shells. The proposed analysis allows us to well recover the westward drift rate, as well as the latitudinal and longitudinal solar cycle oscillations, although the analysed data do not cover a complete (Hale) magnetic solar cycle (around 22 yr). Moreover, the developments made here would enable us to forecast the impact of the South Atlantic Anomaly on space weather. A model of the evolution of the eccentric dipole field (magnitude, offset and tilt) would suffice, together with a model for the solar cycle evolution.

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Long-term observations of the trapped high-energy proton population (L<4) by the NOAA Polar Orbiting Environmental Satellites (POES)

Cited by 35 publications

References 2 publications

The Energetic Particle Telescope: First Results

The Energetic Particle Telescope: First Results

Particle precipitation prior to large earthquakes of both the Sumatra and Philippine Regions: A statistical analysis

The South Atlantic Anomaly throughout the solar cycle

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