Plasma bubbles and scintillation over Brazil

7/29/2019 Plasma bubbles and scintillation over Brazil

1/21

CAWSES Activities

in BrazilJean-Pierre Raulin

CRAAM/EE/UPM


2/21

Credits/Contributors

CRAAM/EE/UPM Center for RadioAstronomy

Astrophysics Mackenzie Engineering School

Presbyterian Mackenzie University

SAVNET - South America VLF Network

INPE National Institute for Space Research

EMBRACE INPE Space Weather program


3/21

Space Weather-Dynamics of Space Environment (Solar flare,

CME and solar winds)

- Sources from BELOW (Convections and waveenergy propagations)

- South Americas singularity

1. Equatorial Ionospheric Anomaly and plasma bubbles

2. South Atlantic Magnetic Anomaly


4/21

Solar radiation and high energy particles

(Solar flare, CME and solar winds)

EIT on SOHO LASCO-C3 on SOHO

CME: Coronal Mass Ejection


5/21

Troposphericconvections

Plasma bubbles inthe ionosphere

Convections and wave energy propagations

Troposphere

Stratosphere

ThermosphereMesosphere

Upward Gravity wavepropagation


6/21

Equatorial Anomaly and Plasma bubbles

TIMED/GUVI


7/21

Geomagnetic Field intensity over

South America

Courtesy of National Observatory,

Brazil

SAMA region:

from 26,000 to 23,000 nT

in the last 100 years,

12 % of decrease

Figure: Protons and electron flux greater than 0.5 MeV in low

Earth orbit measured by the NASA/SAMPEX satellite.

SAMPEX (Solar Anomalous and Magnetospheric Particle

Explorer) (Source: www.aero.org)

South Atlantic Geomagnetic Anomaly
http://www.aero.org/http://www.aero.org/


8/21

8

1. Solar (flare and long-term) radiation, CMEOccurrence Monitoring, SEP events

Important for satellite operation


9/21

Using Radio telescopes

Itapetinga Radio Telescope

(Atibaia) 21-90 GHz

SPUA - 12 GHz

7 GHz

1.2, 1.7, 2.8, 5.6 GHz

Brazililan Decimetric Arrray (Cachoeira Paulista)

BSS 1000-2500MHz

SPECMM 1-40 GHz

INPE/MACKENZIE

BDA

SST 212 & 405 GHzSolar Polarimeters

45 & 90 GHz


10/21

All B4 (and higher events) are detected - Lowest detected solar flare B 2.7 2.7 10-7 W/m2

1 hour

Indirectly from their ionospheric impacts

10 examples of solar flares detected in the low ionosphere (phase measurements) and compared to GOES X-rays


11/21

LONG-TERM SOLAR FORCINGof THE IONOSPHERE

Indirect solar Lyman- monitoring using the VLF technique


12/21

7 8 MARCH 2011 SPE events

CARPET event

Solar Neutrons

SEP event effect in

the ionosphere ?

CARPET Muon detector

excesses

> 9.5 GeV primariy protons at

the top of the atmosphere


13/21

2. Solar wind monitoring by Cosmicray (Muon) (Forbush decrease)

To get Information of:

Solar CME and high density solar wind

approach to the earth


14/21

14

Cosmic ray monitoring by Mon detectorat So Martinho da Serra (29 S, 53 W), RS,

Brazil

Intensity deficitconfined in a cone

To predict Magneticstorm in 6-8 hours


15/21

3. Ionospheric scintillation and TEC

Monitoring by GNSS receivers

To provide information for Telecommunications,

GNSS positioning system application


16/21

16

Plasma bubbles and scintillation over Brazil

Equatorial Plasma Bubbles

Scintilation


17/21

Spatial variability of TEC over Brazil

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18/21

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SUPIM Ionospheric modelConstelao de satlites

GPS This simulation were

obtained from the SUPIM,a co-development of theAeronomy Division of theCEA/INPE with theUniversity of Sheffield andwith the computationalimprovements by theComputer Lab for SpaceWeather at the SSO/INPE

and by the Computer Labfor Mathematical and

Science at the ETE/INPE.


19/21

EMBRACE:

INPE Space Weatherprogram

19


20/21

20


21/21

Estudo e Monitoramento do

Clima Espacial (EMBRACE)

-http://www inpe br/climaespa

21

EMBRACE: Data Collection and Flow

Santa Maria

Documents

Plasma bubbles and scintillation over Brazil