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Enhancements and validation of the real-time optimised D-Region HF radio absorption model

Research output: Contribution to conference - Without ISBN/ISSN › Poster

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Enhancements and validation of the real-time optimised D-Region HF radio absorption model. / Rogers, Neil; Honary, Farideh.
2023. Poster session presented at UK Space Weather and Space Environment Meeting 1, Cardiff, United Kingdom.

Research output: Contribution to conference - Without ISBN/ISSN › Poster

Harvard

Rogers, N & Honary, F 2023, 'Enhancements and validation of the real-time optimised D-Region HF radio absorption model', UK Space Weather and Space Environment Meeting 1, Cardiff, United Kingdom, 12/09/23 - 15/09/23.

APA

Rogers, N., & Honary, F. (2023). Enhancements and validation of the real-time optimised D-Region HF radio absorption model. Poster session presented at UK Space Weather and Space Environment Meeting 1, Cardiff, United Kingdom.

Vancouver

Rogers N, Honary F. Enhancements and validation of the real-time optimised D-Region HF radio absorption model. 2023. Poster session presented at UK Space Weather and Space Environment Meeting 1, Cardiff, United Kingdom.

Author

Rogers, Neil ; Honary, Farideh. / Enhancements and validation of the real-time optimised D-Region HF radio absorption model. Poster session presented at UK Space Weather and Space Environment Meeting 1, Cardiff, United Kingdom.

Bibtex

@conference{b323bd76a7624498ad65de8c7f5e00b8,
title = "Enhancements and validation of the real-time optimised D-Region HF radio absorption model",
abstract = "The Optimised D-Region Absorption Model (ODRAM) provides global nowcasts and forecasts of ionospheric HF radio wave absorption. This results from ionisation by solar flares, Solar Energetic Particles (SEP), and auroral electron precipitation. Parameters of ODRAM are optimised in near real time by assimilating satellite measurements, geomagnetic index estimates, and direct measurements of absorption made by riometers at high latitudes.In this presentation, we validate two new empirical models for the solar flare (shortwave fadeout) model developed from riometer measurements at 22 locations in Canada and Finland recorded during 126 X-class flares in Solar Cycle 23. We then discuss improvements to the empirical Auroral Absorption (AA) models obtained by removing artefacts in the entire measurement archive and an assessment is made of the optimal AA model driver parameters (selected from real-time geomagnetic index estimates or proxies derived from in situ solar wind/IMF measurements).Finally, we assess the combined model performance for a period of active space weather in September 2017. Issues relating to riometer placement, measurement calibration, and artefact removal will be addressed. ",
keywords = "Space weather, ionosphere, riometer, polar cap absorption, auroral absorption, HF radio propagation, shortwave fadeout",
author = "Neil Rogers and Farideh Honary",
year = "2023",
month = sep,
day = "12",
language = "English",
note = "UK Space Weather and Space Environment Meeting 1 : Transitioning from the SWIMMR Space-Weather Programme ; Conference date: 12-09-2023 Through 15-09-2023",
url = "https://iop.eventsair.com/ukswse2023/",

}

RIS

TY - CONF

T1 - Enhancements and validation of the real-time optimised D-Region HF radio absorption model

AU - Rogers, Neil

AU - Honary, Farideh

N1 - Conference code: 1

PY - 2023/9/12

Y1 - 2023/9/12

N2 - The Optimised D-Region Absorption Model (ODRAM) provides global nowcasts and forecasts of ionospheric HF radio wave absorption. This results from ionisation by solar flares, Solar Energetic Particles (SEP), and auroral electron precipitation. Parameters of ODRAM are optimised in near real time by assimilating satellite measurements, geomagnetic index estimates, and direct measurements of absorption made by riometers at high latitudes.In this presentation, we validate two new empirical models for the solar flare (shortwave fadeout) model developed from riometer measurements at 22 locations in Canada and Finland recorded during 126 X-class flares in Solar Cycle 23. We then discuss improvements to the empirical Auroral Absorption (AA) models obtained by removing artefacts in the entire measurement archive and an assessment is made of the optimal AA model driver parameters (selected from real-time geomagnetic index estimates or proxies derived from in situ solar wind/IMF measurements).Finally, we assess the combined model performance for a period of active space weather in September 2017. Issues relating to riometer placement, measurement calibration, and artefact removal will be addressed.

AB - The Optimised D-Region Absorption Model (ODRAM) provides global nowcasts and forecasts of ionospheric HF radio wave absorption. This results from ionisation by solar flares, Solar Energetic Particles (SEP), and auroral electron precipitation. Parameters of ODRAM are optimised in near real time by assimilating satellite measurements, geomagnetic index estimates, and direct measurements of absorption made by riometers at high latitudes.In this presentation, we validate two new empirical models for the solar flare (shortwave fadeout) model developed from riometer measurements at 22 locations in Canada and Finland recorded during 126 X-class flares in Solar Cycle 23. We then discuss improvements to the empirical Auroral Absorption (AA) models obtained by removing artefacts in the entire measurement archive and an assessment is made of the optimal AA model driver parameters (selected from real-time geomagnetic index estimates or proxies derived from in situ solar wind/IMF measurements).Finally, we assess the combined model performance for a period of active space weather in September 2017. Issues relating to riometer placement, measurement calibration, and artefact removal will be addressed.

KW - Space weather

KW - ionosphere

KW - riometer

KW - polar cap absorption

KW - auroral absorption

KW - HF radio propagation

KW - shortwave fadeout

M3 - Poster

T2 - UK Space Weather and Space Environment Meeting 1

Y2 - 12 September 2023 through 15 September 2023

ER -