Coordinated Observations of Ionospheric Scintillations, Density Profiles and Total Electron Content on a Common Magnetic

Coordinated Observations of Ionospheric Scintillations, Density Profiles and Total Electron Content on a Common Magnetic PowerPoint PPT Presentation


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Spread F Meridional Dependence. Motivation: Regional specification from 1-D measurementsCOPEX Campaign OverviewIonospheric variations at conjugate locations Summary. Outline. Data Assimilation MethodsConstraining model outputDeveloping statistical interpolation techniquesAdjusting model drive

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Coordinated Observations of Ionospheric Scintillations, Density Profiles and Total Electron Content on a Common Magnetic

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2. Spread F Meridional Dependence Motivation: Regional specification from 1-D measurements COPEX Campaign Overview Ionospheric variations at conjugate locations Summary

3. Data Assimilation Methods Constraining model output Developing statistical interpolation techniques Adjusting model drivers Kalman filter Adjoint methods Real-time Scintillation Nowcasting from Space SLIDE BACKGROUND: Color is Red: 0, Green= 0, Blue =102 as shown. The template will automatically apply the color. TITLE: Use Arial Bold 32 point, caps & lower case (title case). The color is red= 254, green=232, blue= 0 as shown here. The template will automatically apply the correct color. SUBTITLE: Use Arial Bold 28 point, caps & lower case (title case). The color is red: 254, green:232, blue: 0 as shown here. The template will automatically apply the correct color. WORD SLIDES: Slide body text at all levels should be Arial Bold 24pt. The color should be white. If necessary, reduce the font size to no less than 20 point. The template provides the bullet styles to be used. It will automatically apply the style to your text. Default line spacing is 1; and .5 before paragraphs but may be adjusted according to the amount of text. SLIDE BACKGROUND: Color is Red: 0, Green= 0, Blue =102 as shown. The template will automatically apply the color. TITLE: Use Arial Bold 32 point, caps & lower case (title case). The color is red= 254, green=232, blue= 0 as shown here. The template will automatically apply the correct color. SUBTITLE: Use Arial Bold 28 point, caps & lower case (title case). The color is red: 254, green:232, blue: 0 as shown here. The template will automatically apply the correct color. WORD SLIDES: Slide body text at all levels should be Arial Bold 24pt. The color should be white. If necessary, reduce the font size to no less than 20 point. The template provides the bullet styles to be used. It will automatically apply the style to your text. Default line spacing is 1; and .5 before paragraphs but may be adjusted according to the amount of text.

6. Principal Instrumentation Instruments operated from Oct to 07 Dec 2002 Sites on common flux tube; Campo Grande and Boa Vista magnetically conjugate Combination of these data with available ROCSAT passes and other ancillary data sets provide basis to investigate meridional variations in detail

7. TEC Structure Oct-Nov 2002

8. S4 Structure Oct-Nov 2002 GPS L1 (1575 MHz) Scintillation

9. Examine daily plots between 0000-0200 UT (~2030-2230 LT) No observations below 30° elevation angle used in analysis Consider results statistically when scintillation occurred and data was present at both “high latitude” stations

10. TEC Characterization

11. Peak Density Characterization

12. Slab Thickness

13. What About Scintillation?

14. Statistical View

15. Scintillation intensity appears relatively independent of background TEC variations near the anomaly crests TEC decreases markedly approaching summer solstice, particularly in the southern magnetic hemisphere; change in NmF2 less than half observed TEC decrease On average TEC, NmF2 and slab thickness greater in the northern magnetic hemisphere during this time period (Oct-Dec 2002) S4 appears to be essentially symmetric at the same magnetic latitude in both hemispheres, despite variations in TEC, slab thickness, and NmF2 Vertical distribution of irregularities non-homogenous; propagation effects dominated by layer near F-region peak Conclusions SLIDE BACKGROUND: Color is Red: 0, Green= 0, Blue =102 as shown. The template will automatically apply the color. TITLE: Use Arial Bold 32 point, caps & lower case (title case). The color is red= 254, green=232, blue= 0 as shown here. The template will automatically apply the correct color. SUBTITLE: Use Arial Bold 28 point, caps & lower case (title case). The color is red: 254, green:232, blue: 0 as shown here. The template will automatically apply the correct color. WORD SLIDES: Slide body text at all levels should be Arial Bold 24pt. The color should be white. If necessary, reduce the font size to no less than 20 point. The template provides the bullet styles to be used. It will automatically apply the style to your text. Default line spacing is 1; and .5 before paragraphs but may be adjusted according to the amount of text. SLIDE BACKGROUND: Color is Red: 0, Green= 0, Blue =102 as shown. The template will automatically apply the color. TITLE: Use Arial Bold 32 point, caps & lower case (title case). The color is red= 254, green=232, blue= 0 as shown here. The template will automatically apply the correct color. SUBTITLE: Use Arial Bold 28 point, caps & lower case (title case). The color is red: 254, green:232, blue: 0 as shown here. The template will automatically apply the correct color. WORD SLIDES: Slide body text at all levels should be Arial Bold 24pt. The color should be white. If necessary, reduce the font size to no less than 20 point. The template provides the bullet styles to be used. It will automatically apply the style to your text. Default line spacing is 1; and .5 before paragraphs but may be adjusted according to the amount of text.

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