Morningside Pi2 Pulsation Observed in Space and on the Ground
In this study, we examined a morningside Pi2 pulsation, with a non-substorm signature, that occurred in very quiet geomagnetic conditions (Kp = 0) at 05:38 UT on December 8, 2012, using data obtained by Van Allen Probes A and B (VAP-A and VAP-B, respectively) and at a ground station. Using 1 sec r...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2015-12-01
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| Series: | Journal of Astronomy and Space Sciences |
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| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n4/OJOOBS_2015_v32n4_305.pdf |
| _version_ | 1827362754459074560 |
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| author | Essam Ghamry |
| author_facet | Essam Ghamry |
| author_sort | Essam Ghamry |
| collection | DOAJ |
| description | In this study, we examined a morningside Pi2 pulsation, with a non-substorm signature, that occurred in very quiet
geomagnetic conditions (Kp = 0) at 05:38 UT on December 8, 2012, using data obtained by Van Allen Probes A and B
(VAP-A and VAP-B, respectively) and at a ground station. Using 1 sec resolution vector magnetic field data, we measured
the X-component of the pulsation from the Abu Simbel ground station (L = 1.07, LT = UT +2 hr, where LT represents local
time) in Egypt. At the time of the Pi2 event, Abu Simbel and VAP-A (L = 3.3) were in the morning sector (07:38 LT and 07:59
MLT, respectively, where MLT represents magnetic local time), and VAP-B was in the postmidnight sector (04:18 MLT and
L = 5.7). VAP-A and VAP-B observed oscillations in the compressional magnetic field component (Bz), which were in close
agreement with the X-component measurements of the Pi2 pulsation that were made at Abu Simbel. The oscillations
observed by the satellites and on the ground were in phase. Thus, we concluded that the observed morningside Pi2
pulsation was caused by the cavity resonance mode rather than by ionospheric current systems. |
| first_indexed | 2024-03-08T07:33:59Z |
| format | Article |
| id | doaj.art-3e145dce0f1f4504a7b236ebcd66bb0d |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:33:59Z |
| publishDate | 2015-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-3e145dce0f1f4504a7b236ebcd66bb0d2024-02-02T19:29:48ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092015-12-0132430531010.5140/JASS.2015.32.4.305Morningside Pi2 Pulsation Observed in Space and on the GroundEssam Ghamry0National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo 11421, EgyptIn this study, we examined a morningside Pi2 pulsation, with a non-substorm signature, that occurred in very quiet geomagnetic conditions (Kp = 0) at 05:38 UT on December 8, 2012, using data obtained by Van Allen Probes A and B (VAP-A and VAP-B, respectively) and at a ground station. Using 1 sec resolution vector magnetic field data, we measured the X-component of the pulsation from the Abu Simbel ground station (L = 1.07, LT = UT +2 hr, where LT represents local time) in Egypt. At the time of the Pi2 event, Abu Simbel and VAP-A (L = 3.3) were in the morning sector (07:38 LT and 07:59 MLT, respectively, where MLT represents magnetic local time), and VAP-B was in the postmidnight sector (04:18 MLT and L = 5.7). VAP-A and VAP-B observed oscillations in the compressional magnetic field component (Bz), which were in close agreement with the X-component measurements of the Pi2 pulsation that were made at Abu Simbel. The oscillations observed by the satellites and on the ground were in phase. Thus, we concluded that the observed morningside Pi2 pulsation was caused by the cavity resonance mode rather than by ionospheric current systems.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n4/OJOOBS_2015_v32n4_305.pdfVan Allen ProbesPi2 pulsationcavity mode resonance |
| spellingShingle | Essam Ghamry Morningside Pi2 Pulsation Observed in Space and on the Ground Journal of Astronomy and Space Sciences Van Allen Probes Pi2 pulsation cavity mode resonance |
| title | Morningside Pi2 Pulsation Observed in Space and on the Ground |
| title_full | Morningside Pi2 Pulsation Observed in Space and on the Ground |
| title_fullStr | Morningside Pi2 Pulsation Observed in Space and on the Ground |
| title_full_unstemmed | Morningside Pi2 Pulsation Observed in Space and on the Ground |
| title_short | Morningside Pi2 Pulsation Observed in Space and on the Ground |
| title_sort | morningside pi2 pulsation observed in space and on the ground |
| topic | Van Allen Probes Pi2 pulsation cavity mode resonance |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n4/OJOOBS_2015_v32n4_305.pdf |
| work_keys_str_mv | AT essamghamry morningsidepi2pulsationobservedinspaceandontheground |