The impact of FORMOSAT-5/AIP observations on the ionospheric space weather

Chia-Hung Chen, Chien-Hung Lin, Jann Yenq Liu, Tomoko Matsuo, Wei Han Chen

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper assimilates the in-situ O+ fluxes observations obtained from the Advanced Ionospheric Probe (AIP) onboard the upcoming FORMOSAT-5 (FS-5) satellite and evaluates its possible impact on the ionospheric space weather forecast model. The Observing System Simulation Experiment (OSSE), designed for the global O+ fluxes, is shown to improve the electron density specification in the vicinity of satellite orbits. The root-mean-square-error (RMSE) of the ionospheric electron density obtained from assimilating the daytime O+ fluxes could be improved by ∼10 and ∼5% for the forecast and nowcast, respectively. Although the improvement of nighttime O+ flux assimilation is less significant compared to the daytime assimilation, it still reveals impacts on the model result. This suggests that nighttime observations might not be sufficient to alter the model trajectory in the positive direction as with the daytime result. Alternative data assimilation approaches, such as assimilation of the empirical model built by using the nighttime FS-5/AIP together with other existing satellite observations of O+ flux could obtain better accuracy of the electron density forecast.

Original languageEnglish
Pages (from-to)129-137
Number of pages9
JournalTerrestrial, Atmospheric and Oceanic Sciences
Volume28
Issue number2
DOIs
Publication statusPublished - 2017 Apr 1

Fingerprint

probe
electron density
weather
data assimilation
trajectory
FORMOSAT
simulation
forecast
assimilation
experiment

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)

Cite this

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title = "The impact of FORMOSAT-5/AIP observations on the ionospheric space weather",
abstract = "This paper assimilates the in-situ O+ fluxes observations obtained from the Advanced Ionospheric Probe (AIP) onboard the upcoming FORMOSAT-5 (FS-5) satellite and evaluates its possible impact on the ionospheric space weather forecast model. The Observing System Simulation Experiment (OSSE), designed for the global O+ fluxes, is shown to improve the electron density specification in the vicinity of satellite orbits. The root-mean-square-error (RMSE) of the ionospheric electron density obtained from assimilating the daytime O+ fluxes could be improved by ∼10 and ∼5{\%} for the forecast and nowcast, respectively. Although the improvement of nighttime O+ flux assimilation is less significant compared to the daytime assimilation, it still reveals impacts on the model result. This suggests that nighttime observations might not be sufficient to alter the model trajectory in the positive direction as with the daytime result. Alternative data assimilation approaches, such as assimilation of the empirical model built by using the nighttime FS-5/AIP together with other existing satellite observations of O+ flux could obtain better accuracy of the electron density forecast.",
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The impact of FORMOSAT-5/AIP observations on the ionospheric space weather. / Chen, Chia-Hung; Lin, Chien-Hung; Liu, Jann Yenq; Matsuo, Tomoko; Chen, Wei Han.

In: Terrestrial, Atmospheric and Oceanic Sciences, Vol. 28, No. 2, 01.04.2017, p. 129-137.

Research output: Contribution to journalArticle

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