CubeSat Observation of the Radiation Field of the South Atlantic Anomaly

Kovář, Pavel; Sommer, Marek

doi:10.3390/rs13071274

Cited by 8 publications

(5 citation statements)

References 33 publications

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“…This paper aims to verify the capability of the 1U CubeSat to realize the measurement of the radiation spectra. This is in contrast to our previous paper in which we tested the functionality of the GPS receiver [19] and performed less complex dosimetry measurement with low volume of the used data without deeper evaluation [20,21].…”

Section: Introductionmentioning

confidence: 79%

“…The proton flux is the highest in the South Atlantic Anomaly (SAA), the location where the geomagnetic field dips closest to the Earth s surface. Unfortunately, the Earth's magnetic poles are slowly moving, which causes shifting of the radiation field maximum [21]. The Earth's radiation field also depends on the Sun's activity, which will be the scope of further investigation of Lucky-7.…”

Section: Resultsmentioning

confidence: 99%

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Demonstration of the Capability of 1U CubeSat for Measurement of the Energy Spectrum on LEO

et al. 2022

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The goal of this paper is to demonstrate the capability of the 1U CubeSat to study the radiation spectra on LEO. The research was realized by the Lucky-7 mission with the primary goal of testing electronics such as a power supply, piNAV L1 GPS receiver, UHF communication system, and other subsystems in the natural space environment, and the secondary goal of testing the possibility of using 1U CubSat class satellites for scientific tasks. The satellite is equipped with a piNAV GPS receiver and piDOSE radiation detector, silicon diode radiation spectrometer, camera, and other sensors. The on-board computer enables storage of 34 h of measurements of the radiation spectrum. These measurements can be downloaded by the UHF communication system during four satellite passes over the monitoring ground station. We successfully verified all necessary instruments and their cooperation and measurement procedure. The UHF communication was identified as the most critical subsystem because of its low capacity, which slowed down the satellite operation. We needed four zenith passes to upload 34 h of measurement.

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Section: Introductionmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Demonstration of the Capability of 1U CubeSat for Measurement of the Energy Spectrum on LEO

et al. 2022

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“…The distributions of the coefficients at different altitudes were also different in the stratosphere, and the coefficients in the lower stratosphere were higher than those in the upper stratosphere. Interestingly, the South Pacific anomaly impacted the SCIAMACHY data; therefore, the data reliability for the Atlantic region east of Argentina was low [47].…”

Section: Global Optical Depth Coefficients (α J )mentioning

confidence: 99%

Unusual Enhancement of the Optical Depth on the Continental Shelf Depth Latitudinal Variation in the Stratospheric Polar Vortex

Qian

Yang

et al. 2023

Remote Sensing

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The Antarctic ozone hole has attracted attention concerning global climate change. Breakthroughs regarding ozone observation methods and the formation principles of ozone holes have occurred. This study compared the slant column ozone obtained from SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (SCIAMACHY) Level 1 optical spectroscopy data processed by QDOAS software with that reconstructed from SCIAMACHY Level 2 ozone data using geographic information to obtain the optical depth coefficients. The global distribution of optical depth coefficients reveals latitudinal homogeneity, whereas the distribution of coefficients in the polar regions reveals heterogeneity. This heterogeneity has an annual variation pattern, alternating between strong and weak distributions in the Arctic and Antarctic regions. It is most evident in the Palmer Peninsula of Antarctica, where the optical depth coefficients were significantly higher than those of the surrounding regions at the same latitude. This analysis excluded the atmospheric pressure influence and suggested the influence of the continental shelf depth. The protrusion of the continental shelf depth changes the optical depth coefficients owing to the geographical proximity of the Antarctic Palmer Peninsula to South America, which separates the Atlantic and Pacific Oceans in an east–west direction.

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“…Finally, Mandea and Chambodut (2020) studies the different processes at work in the evolution of the geomagnetic field, and in particular the evolution of the SAA. Table 1 by Kovář and Sommer (2021) summarizes the results of publications about the evolution of the SAA position.…”

Section: Introductionmentioning

confidence: 99%

South Atlantic Anomaly Evolution Seen by the Proton Flux

Ginisty,

Wrobel,

Ecoffet

et al. 2024

JGR Space Physics

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The SEM‐2 (Space Environment Monitor‐2) instrument embedded on the NOAA‐15 Low Earth Orbit satellite provides measurements of trapped protons in the Van Allen inner belt from 1998 to nowadays. This continuous set of measurements enables us to study the dynamics of the South Atlantic Anomaly (SAA) over more than two solar cycles, particularly, its temporal evolution. We observe that the area of the SAA is anti‐correlated with the solar activity. Two physical processes explain this anticorrelation. First, the more the Sun is active the more it disables the cosmic rays to reach the Earth's magnetosphere and fill in the inner radiation belt with protons. Then, when the Sun is more active, the upper atmosphere is warmer and therefore absorbs more protons from the radiation belt. Then, we investigate the protons flux centroid of the SAA. The temporal evolution of its position, latitude and, longitude is studied over the same time interval (1998–2022). We notice that the latitude of the centroid is also anti‐correlated with the solar activity whereas the longitude seems absolutely independent. The temporal evolution of the position of the centroid shows a drift of the SAA. Indeed from 1998 to 2022 the SAA drifted of about 7° West. The SEM‐2 instrument measures flux for protons of different energies (16, 36, 70, and, 140 MeV). For each energy, the SAA dynamic has a similar trend but with different values. These differences are investigated and the results are discussed.

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CubeSat Observation of the Radiation Field of the South Atlantic Anomaly

Cited by 8 publications

References 33 publications

Demonstration of the Capability of 1U CubeSat for Measurement of the Energy Spectrum on LEO

Demonstration of the Capability of 1U CubeSat for Measurement of the Energy Spectrum on LEO

Unusual Enhancement of the Optical Depth on the Continental Shelf Depth Latitudinal Variation in the Stratospheric Polar Vortex

South Atlantic Anomaly Evolution Seen by the Proton Flux

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