Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation Altitudes
Abstract Enhanced radiation in the Earth's atmosphere can pose serious hazards to pilots, aircraft passengers, and commercial space travelers. Recent results have shown, statistically, that there is a strong correlation between dose rates observed by Automated Radiation Measurements for Aerospa...
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2024SW004184 |
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| author | Homayon Aryan Jacob Bortnik W. Kent Tobiska Piyush Mehta Rashmi Siddalingappa Benjamin Hogan |
| author_facet | Homayon Aryan Jacob Bortnik W. Kent Tobiska Piyush Mehta Rashmi Siddalingappa Benjamin Hogan |
| author_sort | Homayon Aryan |
| collection | DOAJ |
| description | Abstract Enhanced radiation in the Earth's atmosphere can pose serious hazards to pilots, aircraft passengers, and commercial space travelers. Recent results have shown, statistically, that there is a strong correlation between dose rates observed by Automated Radiation Measurements for Aerospace Safety (ARMAS) instruments at aviation altitudes (>9 km) and plasmaspheric hiss wave power measured by NASA's Van Allen Probes within the inner magnetosphere. Plasmaspheric hiss waves play a very important role in removing energetic electrons from the Earth's radiation belts by precipitating them into the upper atmosphere. These relativistic electrons generally drift eastwards along closed magnetic drift shells. In this study, we use magnetic conjunction events between ARMAS and the Van Allen Probes to analyze the causality between plasmaspheric hiss waves and enhanced radiation observed at aviation altitude. We specifically study how the size of the conjunction window and a shift in L and MLT of the conjunction window affect the correlation between dose rates and plasmaspheric hiss wave power. This is to determine if the observed enhanced radiation at aviation altitude is indeed caused by the plasmaspheric hiss waves in the inner magnetosphere. The results show that the enhanced radiation levels are only correlated with plasmaspheric hiss waves within conjunction windows of −1 ≤ L ≤ 1 and 0 ≤ MLT ≤ 2. The correlation between dose rate and hiss wave power increases slightly if ARMAS is shifted approximately 1 hr in MLT to the east of the Van Allen Probes, consistent with the drift trajectory of the electrons precipitating into the atmosphere. |
| format | Article |
| id | doaj-art-198fb13c07cc4dae8dc2c023ecc38008 |
| institution | OA Journals |
| issn | 1542-7390 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-198fb13c07cc4dae8dc2c023ecc380082025-08-20T02:03:43ZengWileySpace Weather1542-73902025-02-01232n/an/a10.1029/2024SW004184Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation AltitudesHomayon Aryan0Jacob Bortnik1W. Kent Tobiska2Piyush Mehta3Rashmi Siddalingappa4Benjamin Hogan5University of California Los Angeles Atmospheric and Oceanic Sciences Los Angeles CA USAUniversity of California Los Angeles Atmospheric and Oceanic Sciences Los Angeles CA USASpace Weather Division Space Environment Technologies Pacific Palisades CA USAWest Virginia University Mechanical and Aerospace Engineering Morgantown WV USAWest Virginia University Mechanical and Aerospace Engineering Morgantown WV USASpace Weather Division Space Environment Technologies Pacific Palisades CA USAAbstract Enhanced radiation in the Earth's atmosphere can pose serious hazards to pilots, aircraft passengers, and commercial space travelers. Recent results have shown, statistically, that there is a strong correlation between dose rates observed by Automated Radiation Measurements for Aerospace Safety (ARMAS) instruments at aviation altitudes (>9 km) and plasmaspheric hiss wave power measured by NASA's Van Allen Probes within the inner magnetosphere. Plasmaspheric hiss waves play a very important role in removing energetic electrons from the Earth's radiation belts by precipitating them into the upper atmosphere. These relativistic electrons generally drift eastwards along closed magnetic drift shells. In this study, we use magnetic conjunction events between ARMAS and the Van Allen Probes to analyze the causality between plasmaspheric hiss waves and enhanced radiation observed at aviation altitude. We specifically study how the size of the conjunction window and a shift in L and MLT of the conjunction window affect the correlation between dose rates and plasmaspheric hiss wave power. This is to determine if the observed enhanced radiation at aviation altitude is indeed caused by the plasmaspheric hiss waves in the inner magnetosphere. The results show that the enhanced radiation levels are only correlated with plasmaspheric hiss waves within conjunction windows of −1 ≤ L ≤ 1 and 0 ≤ MLT ≤ 2. The correlation between dose rate and hiss wave power increases slightly if ARMAS is shifted approximately 1 hr in MLT to the east of the Van Allen Probes, consistent with the drift trajectory of the electrons precipitating into the atmosphere.https://doi.org/10.1029/2024SW004184enhanced radiationplasmaspheric hiss wavesaviation altitudesVan Allen radiation beltdose ratesspace hazards |
| spellingShingle | Homayon Aryan Jacob Bortnik W. Kent Tobiska Piyush Mehta Rashmi Siddalingappa Benjamin Hogan Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation Altitudes Space Weather enhanced radiation plasmaspheric hiss waves aviation altitudes Van Allen radiation belt dose rates space hazards |
| title | Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation Altitudes |
| title_full | Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation Altitudes |
| title_fullStr | Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation Altitudes |
| title_full_unstemmed | Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation Altitudes |
| title_short | Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation Altitudes |
| title_sort | cross correlation between plasmaspheric hiss waves and enhanced radiation levels at aviation altitudes |
| topic | enhanced radiation plasmaspheric hiss waves aviation altitudes Van Allen radiation belt dose rates space hazards |
| url | https://doi.org/10.1029/2024SW004184 |
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