|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >
Validation of electron density and temperature observed by DEMETER
| Title: | Validation of electron density and temperature observed by DEMETER |
| Authors: | Kakinami, Yoshihiro Browse this author | | Kamogawa, Masashi Browse this author | | Onishi, Tatsuo Browse this author | | Mochizuki, Kaori Browse this author | | Lebreton, Jean-Pierre Browse this author | | Watanabe, Shigeto Browse this author →KAKEN DB | | Yamamoto, Masa-Yuki Browse this author | | Mogi, Toru Browse this author →KAKEN DB |
| Keywords: | Electron density and temperature in the upper ionosphere | | DEMETER satellite | | IRI | | Langmuir probe | | Contamination of probe | | Electron temperature in deep solar minimum solar cycle 23/24 |
| Issue Date: | 1-Oct-2013 |
| Publisher: | Elsevier sci ltd |
| Journal Title: | Advances in space research |
| Volume: | 52 |
| Issue: | 7 |
| Start Page: | 1267 |
| End Page: | 1273 |
| Publisher DOI: | 10.1016/j.asr.2013.07.003 |
| Abstract: | Measuring electron density (Ne) and temperature (Te) using a DC Langmuir probe in the ionosphere is very often degraded by the electrode contamination. In order to examine the accuracy of DEMETER observations, we compared DEMETER Ne and Te with several other satellites observations and IRI2012 as reference data. DEMETER Ne and Te show well-known dependencies on the solar irradiance except for the range of F10.7 > 100. However, DEMETER Ne are about 70% lower than those of IRI in day time data and its solar irradiance dependency is consistent with the reference data in night time data. It was confirmed that the negative slope appears in deep solar minimum solar cycle 23/24. DEMETER Te are higher than IRI data by 500-1500 K in day time and by 800 K in night time. The relation between Ne and Te is well defined by a negative slope both in DEMETER and IRI during day time, while such a similarity is not recognized in night time data. DEMETER Te is 700 K higher than IRI Te for the same value of Ne. When Ne is less than 10(4) cm(-3) in night time, significant reductions in DEMETER Te are observed, which is close to expected values. Such discrepancies from the reference data and some peculiar behaviors of DEMETER Te and Ne data necessitate a careful attention in using them in consideration of their data alterations. However, their relative variations and averaged behavior in time contain useful information for scientific studies such as dependencies on solar irradiance and wave-4 longitudinal structure under certain conditions (Ne > 10(4) cm(-3) and F10.7 < 100). (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved. |
| Relation: | http://www.elsevier.com/wps/find/authorsview.authors/rights | | http://www.sciencedirect.com/science/article/pii/S0273117713004146 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/53480 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 茂木 透
|
