Analysis of Antarctic Scintillation Measured at McMurdo and South - - PowerPoint PPT Presentation

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Analysis of Antarctic Scintillation Measured at McMurdo and South - - PowerPoint PPT Presentation

Apr 30, 2023 343 likes •728 views

Analysis of Antarctic Scintillation Measured at McMurdo and South Pole Station Anthea Coster 1 , Evan G Thomas 2 , Larisa Goncharenko 1 , Allan Weatherwax 3 , Gary Bust 4 , Yusuke Ebihara 5 MIT Haystack Observatory, Westford, MA 1. Virginia

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Analysis of Antarctic Scintillation Measured at McMurdo and South Pole Station

Anthea Coster1 , Evan G Thomas2, Larisa Goncharenko1, Allan Weatherwax3, Gary Bust4, Yusuke Ebihara5

1.

MIT Haystack Observatory, Westford, MA

2.

Virginia Tech, Blacksburg, VA

3.

Siena College, NY

4.

Johns Hopkins Applied Research Laboratory, MD

5.

RISH, Kyoto University

IES 2015

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OUTLINE

 Introduction  17 March 2013  New TEC/ Scintillation inputs into Madrigal

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Map of GPS receivers

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18:00-19:20 UT

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Scintillation - GNSS

 Ionospheric irregularities cause rapid

fluctuations of radio signal amplitude and phase, called scintillation

 Issues with GNSS receivers measuring

amplitude scintillation measurements in polar regions

 Issues of loss of lock issues with certain

receivers

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Where Scintillation is Observed

Auroral/Polar Cap 1) Dayside: Phase scintillation is observed on the dayside within a tongue of ionization (TOI) and dayside aurora (cusp). 2) Nightside: scintillation is collocated with (a) strong post-midnight return convection (TOI) and (b) auroral breakups in pre-midnight sector. Subauroral latitudes 3) Scintillation maps to the poleward edge of main trough and is collocated with subauroral polarization stream (SAPS) and storm-enhanced plasma density (SED).

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Location of GPS scintillation receivers in Antarctica: South Pole and McMurdo

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OUTLINE

 Introduction  17 March 2013  New TEC/ Scintillation inputs into Madrigal

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17 Mar 2013

17 Mar 2013 Conditions

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OUTLINE

 Introduction  17 March 2013  New TEC/ Scintillation inputs into Madrigal

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South Pole Phase Scintillation > 0.3 Counts per Day 2013

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South Pole Phase Scintillation > 0.3 Counts per Day 2013 versus Ap

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South Pole is a unique location where we can observe both the nightside aurora (substorm) and the dayside aurora (cusp).

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Nighttime Aurora - Substorms

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01:40 UT

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1:56

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2:00

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2:12

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2:23

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Summary

Presented case study of Antarctic scintillation associated with 17 March 2013 storm McMurdo and South Pole scintillation data now available through Madrigal. Capability of overlaying South Pole scintillation data onto auroral imaging data will be available in Madrigal soon.