Direction‐finding measurements of Jovian low‐frequency radio components by Juno near Perijove 1
Abstract With the aid of the radio and plasma wave (Waves) instrument on board the Juno spacecraft, the first scientific close encounter to Jupiter (Perijove 1) of Juno led to an opportunity to perform direction‐finding measurements of the intense Jovian broadband kilometric (bKOM) radiation at 10 t...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2017-07-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/2017GL072850 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850272529148542976 |
|---|---|
| author | Masafumi Imai William S. Kurth George B. Hospodarsky Scott J. Bolton John E. P. Connerney Steven M. Levin |
| author_facet | Masafumi Imai William S. Kurth George B. Hospodarsky Scott J. Bolton John E. P. Connerney Steven M. Levin |
| author_sort | Masafumi Imai |
| collection | DOAJ |
| description | Abstract With the aid of the radio and plasma wave (Waves) instrument on board the Juno spacecraft, the first scientific close encounter to Jupiter (Perijove 1) of Juno led to an opportunity to perform direction‐finding measurements of the intense Jovian broadband kilometric (bKOM) radiation at 10 to 142 kHz, two escaping continuum radiation (ECR) events at 9 to 22 kHz, and two narrowband kilometric (nKOM) radiation events at 45–112 kHz. We conclude that the northern bKOM radio sources are localized on M‐shell = 50–60 field lines where M‐shell is similar to L‐shell for nondipolar fields. The beam cone half‐angle varies from 40° to 55°. By intersecting the wave k vector with the Jovian centrifugal equator, two ECR sources are located inside and outside of 11–12 RJ, and two nKOM sources are found between 11 and 20 RJ. These source frequencies and locations can be used for plasma diagnostics in Jupiter's inner magnetosphere. |
| format | Article |
| id | doaj-art-a0e7fc44d6334d8e880048ddcdf1ce39 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2017-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-a0e7fc44d6334d8e880048ddcdf1ce392025-08-20T01:51:46ZengWileyGeophysical Research Letters0094-82761944-80072017-07-0144136508651610.1002/2017GL072850Direction‐finding measurements of Jovian low‐frequency radio components by Juno near Perijove 1Masafumi Imai0William S. Kurth1George B. Hospodarsky2Scott J. Bolton3John E. P. Connerney4Steven M. Levin5Department of Physics and Astronomy University of Iowa Iowa City Iowa USADepartment of Physics and Astronomy University of Iowa Iowa City Iowa USADepartment of Physics and Astronomy University of Iowa Iowa City Iowa USASpace Science Department Southwest Research Institute San Antonio Texas USANASA Goddard Space Flight Center Greenbelt Maryland USAJet Propulsion Laboratory California Institute of Technology Pasadena California USAAbstract With the aid of the radio and plasma wave (Waves) instrument on board the Juno spacecraft, the first scientific close encounter to Jupiter (Perijove 1) of Juno led to an opportunity to perform direction‐finding measurements of the intense Jovian broadband kilometric (bKOM) radiation at 10 to 142 kHz, two escaping continuum radiation (ECR) events at 9 to 22 kHz, and two narrowband kilometric (nKOM) radiation events at 45–112 kHz. We conclude that the northern bKOM radio sources are localized on M‐shell = 50–60 field lines where M‐shell is similar to L‐shell for nondipolar fields. The beam cone half‐angle varies from 40° to 55°. By intersecting the wave k vector with the Jovian centrifugal equator, two ECR sources are located inside and outside of 11–12 RJ, and two nKOM sources are found between 11 and 20 RJ. These source frequencies and locations can be used for plasma diagnostics in Jupiter's inner magnetosphere.https://doi.org/10.1002/2017GL072850JupiterJuno/Wavesdirection‐finding measurementsbroadband kilometric radiationnarrowband kilometric radiationescaping continuum radiation |
| spellingShingle | Masafumi Imai William S. Kurth George B. Hospodarsky Scott J. Bolton John E. P. Connerney Steven M. Levin Direction‐finding measurements of Jovian low‐frequency radio components by Juno near Perijove 1 Geophysical Research Letters Jupiter Juno/Waves direction‐finding measurements broadband kilometric radiation narrowband kilometric radiation escaping continuum radiation |
| title | Direction‐finding measurements of Jovian low‐frequency radio components by Juno near Perijove 1 |
| title_full | Direction‐finding measurements of Jovian low‐frequency radio components by Juno near Perijove 1 |
| title_fullStr | Direction‐finding measurements of Jovian low‐frequency radio components by Juno near Perijove 1 |
| title_full_unstemmed | Direction‐finding measurements of Jovian low‐frequency radio components by Juno near Perijove 1 |
| title_short | Direction‐finding measurements of Jovian low‐frequency radio components by Juno near Perijove 1 |
| title_sort | direction finding measurements of jovian low frequency radio components by juno near perijove 1 |
| topic | Jupiter Juno/Waves direction‐finding measurements broadband kilometric radiation narrowband kilometric radiation escaping continuum radiation |
| url | https://doi.org/10.1002/2017GL072850 |
| work_keys_str_mv | AT masafumiimai directionfindingmeasurementsofjovianlowfrequencyradiocomponentsbyjunonearperijove1 AT williamskurth directionfindingmeasurementsofjovianlowfrequencyradiocomponentsbyjunonearperijove1 AT georgebhospodarsky directionfindingmeasurementsofjovianlowfrequencyradiocomponentsbyjunonearperijove1 AT scottjbolton directionfindingmeasurementsofjovianlowfrequencyradiocomponentsbyjunonearperijove1 AT johnepconnerney directionfindingmeasurementsofjovianlowfrequencyradiocomponentsbyjunonearperijove1 AT stevenmlevin directionfindingmeasurementsofjovianlowfrequencyradiocomponentsbyjunonearperijove1 |