dc.date.accessioned | 2022-04-25T15:41:48Z | |
dc.date.available | 2022-04-25T15:41:48Z | |
dc.date.created | 2022-01-07T16:36:40Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Fu, Weizheng Ssessanga, Nicholas Yokoyama, Tatsuhiro Yamamoto, Mamoru . High-Resolution 3-D Imaging of Daytime Sporadic-E Over Japan by Using GNSS TEC and Ionosondes. Space Weather. 2021, 19(12), 1-16 | |
dc.identifier.uri | http://hdl.handle.net/10852/93730 | |
dc.description.abstract | A novel two-step three-dimensional (3-D) computerized ionospheric tomography (CIT) technique has been developed to image the structure of daytime midlatitude sporadic-E (Es). The CIT relies on total electron content (TEC) from a dense ground-based Global Navigation Satellite System (GNSS) receiver network over the Japan area. First, on a coarse grid, the TEC data and a multiplicative algebraic reconstruction technique (MART) are used to reconstruct the F region from a smooth background. Then, on a fine grid and using singular value decomposition (SVD), the residues after deducting the F region contribution to TEC are utilized in reconstructing the E region, extending 80–180 km in altitude. To vertically constrain the E region solution, we introduced a family of subsets of time-dependent empirical orthogonal functions (EOFs) from a Chapman model function tuned to manually scaled ionosonde observations. We analyzed three event days to validate the results. East-West (E-W) aligned frontal structures, spanning several hundred kilometers, migrating northward in the morning and southward in the afternoon, were observed. The new technique effectively tracks the Es-height variation over time, which had proved difficult to reproduce in earlier tempts at 3-D Es reconstructions. | |
dc.language | EN | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.title | High-Resolution 3-D Imaging of Daytime Sporadic-E Over Japan by Using GNSS TEC and Ionosondes | |
dc.type | Journal article | |
dc.creator.author | Fu, Weizheng | |
dc.creator.author | Ssessanga, Nicholas | |
dc.creator.author | Yokoyama, Tatsuhiro | |
dc.creator.author | Yamamoto, Mamoru | |
cristin.unitcode | 185,15,4,0 | |
cristin.unitname | Fysisk institutt | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1976773 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Space Weather&rft.volume=19&rft.spage=1&rft.date=2021 | |
dc.identifier.jtitle | Space Weather | |
dc.identifier.volume | 19 | |
dc.identifier.issue | 12 | |
dc.identifier.doi | https://doi.org/10.1029/2021SW002878 | |
dc.identifier.urn | URN:NBN:no-96286 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 1542-7390 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/93730/1/Space%2BWeather%2B-%2B2021%2B-%2BFu%2B-%2BHigh%25E2%2580%2590Resolution%2B3%25E2%2580%2590D%2BImaging%2Bof%2BDaytime%2BSporadic%25E2%2580%2590E%2BOver%2BJapan%2Bby%2BUsing%2BGNSS%2BTEC%2Band%2BIonosondes.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | e2021SW002878 | |