Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23
It is known that space weather harshly affects spacecraft performance, yet spacecraft operations and understanding the cause of anomalies can be challenging due to the complexity of environmental metrics. In this work, we analyse five metrics and in-situ measurements (Kp, Dst, and AE index, and high...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | en_US |
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International Journal of Space Science and Engineering
2017
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| Online Access: | http://hdl.handle.net/1721.1/110900 |
| _version_ | 1826197116561653760 |
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| author | Lohmeyer, Whitney Q. Pang, Anthony Cahoy, Kerry Shprits, Yuri |
| author2 | Space Telecommunications Astronomy and Radiation (STAR) Lab |
| author_facet | Space Telecommunications Astronomy and Radiation (STAR) Lab Lohmeyer, Whitney Q. Pang, Anthony Cahoy, Kerry Shprits, Yuri |
| author_sort | Lohmeyer, Whitney Q. |
| collection | MIT |
| description | It is known that space weather harshly affects spacecraft performance, yet spacecraft operations and understanding the cause of anomalies can be challenging due to the complexity of environmental metrics. In this work, we analyse five metrics and in-situ measurements (Kp, Dst, and AE index, and high-energy proton and electron flux) throughout Solar Cycles 20–23 (1964 to 2008), and provide a baseline for the environment during the phases of the solar cycles (maximum, minimum, declining or ascending). We define increased activity as activity greater than two median absolute deviations (MADs) above the average activity for each phase. MAD is used, rather than standard deviation, because it is more resilient to outliers. The average and MAD values are tabulated in Table 3 to Table 6. We determine the probability that increased activity occurs 3, 14 or 30 days before a random day to distinguish between increased/quiet activities and to aid in correlating intensifications of the environment and anomalous satellite performance. |
| first_indexed | 2024-09-23T10:43:03Z |
| format | Article |
| id | mit-1721.1/110900 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2025-02-19T04:19:28Z |
| publishDate | 2017 |
| publisher | International Journal of Space Science and Engineering |
| record_format | dspace |
| spelling | mit-1721.1/1109002025-02-11T19:58:16Z Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23 Lohmeyer, Whitney Q. Pang, Anthony Cahoy, Kerry Shprits, Yuri Space Telecommunications Astronomy and Radiation (STAR) Lab Massachusetts Institute of Technology. Department of Aeronautics and Astronautics satellite anomalies radiation effects space weather indices space weather measurements It is known that space weather harshly affects spacecraft performance, yet spacecraft operations and understanding the cause of anomalies can be challenging due to the complexity of environmental metrics. In this work, we analyse five metrics and in-situ measurements (Kp, Dst, and AE index, and high-energy proton and electron flux) throughout Solar Cycles 20–23 (1964 to 2008), and provide a baseline for the environment during the phases of the solar cycles (maximum, minimum, declining or ascending). We define increased activity as activity greater than two median absolute deviations (MADs) above the average activity for each phase. MAD is used, rather than standard deviation, because it is more resilient to outliers. The average and MAD values are tabulated in Table 3 to Table 6. We determine the probability that increased activity occurs 3, 14 or 30 days before a random day to distinguish between increased/quiet activities and to aid in correlating intensifications of the environment and anomalous satellite performance. 2017-08-01T20:07:33Z 2017-08-01T20:07:33Z 2013-01 Article 20488459 20488467 http://hdl.handle.net/1721.1/110900 Lohmeyer, W. Q., Pang, A., Cahoy, K., & Shprits, Y. (2013). Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23. International Journal Of Space Science And Engineering, 1(3), 230. en_US application/pdf International Journal of Space Science and Engineering |
| spellingShingle | satellite anomalies radiation effects space weather indices space weather measurements Lohmeyer, Whitney Q. Pang, Anthony Cahoy, Kerry Shprits, Yuri Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23 |
| title | Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23 |
| title_full | Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23 |
| title_fullStr | Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23 |
| title_full_unstemmed | Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23 |
| title_short | Quantifying the average and the likelihood of increases in space weather indices and in situ measurements during Solar Cycles 20–23 |
| title_sort | quantifying the average and the likelihood of increases in space weather indices and in situ measurements during solar cycles 20 23 |
| topic | satellite anomalies radiation effects space weather indices space weather measurements |
| url | http://hdl.handle.net/1721.1/110900 |
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