How to use MAGDAS Data for Science -- STP Phenomena in MAGDAS Data - S. Abe, T. Uozumi, A. Ikeda, Y....

How to use MAGDAS Data for Science -- STP Phenomena in

MAGDAS Data -S. Abe, T. Uozumi, A. Ikeda, Y.

Yamazaki, G. Maeda and K. Yumoto ：

SERC, Kyushu University.MAGDAS Session in ISWI UN/NASA/JAXA Workshop,Helwan, Egypt6 – 10 November 2010

Outline

1. Data transmission system of MAGDAS

2. Introduction to Africa MAGDAS data DVD

3. Examples of STP phenomena which can see by using MAGDAS data

Our presentation has three main topics.

2ISWI UN/NASA/JAXA Workshop, Helwan, Egypt

About MAGDAS network

MAGDAS is a world-wide ground magnetometer network. It mainly consist of three magnetometer chains: 210MM, Magnetic Equator, and 96 MM chain along the Africa region.


About MAGDAS magnetometer

Former presentations show the MAGDAS magnetometer system detail. Thus, this presentation snips the detail of magnetometer, and summarized the MAGDAS magnetometer.

Features of MAGDAS: (1) Send 3axes magnetometer data in real time to SERC. (2) Record data on data cards at all times (even during

power failures). (3) Get the precise time and location from GPS. (4) The sampling rate is one second.


Example. MAGDAS-II component

Battery backup Unit

GPS

MAGDAS-II mainly consists of these units:

1. Magnetometer unit (Sensor and Amplifier)2. Data processing unit 2-1. Data logging unit

(including A/D and GPS) 2-2. Data transfer unit3. Battery backup unit4. Data Server

Data Server in Japan

Oversea station5ISWI UN/NASA/JAXA Workshop, Helwan, Egypt

Important device on this presentation

Schematic diagram of MAGDAS data flow


Acquisition Server

Public Access Server

MAGDAS MAGDAS MAGDAS

user

FTP accessUsername,Password

Get Data http access,no password

Get plot

Raw Data

Storage Data

Raw Data Raw Data

(Server for Incoming Field Data)

(Server for Providing Data)

user

・　・　・

Data Check & Correct

SERC

user

CD/DVD

MAGDAS near real time plot

• The side panel shows our website for MAGDAS-II stations. All people can see near real time ordinary and diff plot of all the MAGDAS-II stations.

• These plots are supported by your ceaseless maintenance to magnetometer and network.

http://magdas2.serc.kyushu-u.ac.jp/realtime/index.html7ISWI UN/NASA/JAXA Workshop, Helwan, Egypt

Network connection between oversea stations and SERC

• There are many differences and difficulties to construct the network connection between each oversea station and SERC.

• The difference of network system at each country.

• For example, Japan is almost covered by broadband network using ADSL or FTTH. However, data transmission by using cell-phone is very expensive and out of global standard (called Galápagos syndrome).


Examples of network connection between oversea stations and SERC

• Direct connection by using broadband network

• SSH protocol is used on background

• This is the standard network connection model between oversea and SERC



• Direct connection by using cellphone network

• SSH protocol is used on background



• Because of several reasons, MAGDAS cannot send data directly or cannot use SSH protocol

• SERC access FTP server constructed in oversea stations


Global Internet Map 2009 from CISCO


EUROPENorth America

South America

AsiaPacific

Africa

About MAGDAS Africa data DVD• Geomagnetic data

collected by the above methods are released from SERC after some processes for scientific usage (for example, noise reduction, temperature drift correction, and so on).

• SERC announced that we have released Africa MAGDAS data collection as DVD media.

• FTP server is available.

FTP site:ftp://magdas.serc.kyushu-u.ac.jp/

Username:afrdvd Password:05AfrM21o


ftp://magdas.serc.kyushu-u.ac.jp/

Contents of MAGDAS Africa DVD• The following panel shows a tree diagram of the

contents of Africa DVD media.


DocumentsIAGA2002MAGDAS1QLPlot

DataFormatMAGDAS_15_papersReferencesSERC_Data_Release_MAGDAS.pdf





Station Code Min Year(YYYY)





Station Code

New Africa DVD• In 2010, our teams went

to Africa stations and maintained the magnetometers and networks.

• In addition, we got some of SD and CF media at each station.

• We are processing these media, and updating Africa DVD contents.


STP phenomena in MAGDAS data• In last section, we will

present some examples of STP phenomena which can know from MAGDAS data.

• We can see many Solar Terrestrial Physics (STP) phenomena by analyzing MAGDAS data.

• All of them are very important to understand the complexity of Sun-Earth system. 19ISWI UN/NASA/JAXA Workshop, Helwan, Egypt

http://sec.gsfc.nasa.gov/popscise.jpg

STP phenomena: SSC and SFE• There are some sudden

perturbations in the northward component of the ground magnetic fields.

• Sudden perturbation occurred with solar flares is called Solar Flare Effect (SFE).

• The abrupt increase or decrease marked the beginning of a geomagnetic storm is called Storm Sudden Commencement (SSC).

• Side panel shows X-ray plot observed at GOES satellte and SFE observed at MAGDAS stations.


Yamazaki et al., 2009

STP phenomena: DP2


12 20UT

1 Apr. 2007

181614

20nT/div

0.5 mV/m /div

H comp.

ANCSMA

KUJ

DAV

Ey(ion.)

PTK

12 20UT

181614

1 Apr. 2007 Solar Wind (OMNI)Bz(nT)

Ey(mV/m)

Vsw(km/s)

Psw (nPa)

10

-10

0

0

-4

4

600

520

2

4

dayti

me

dayti

me

Nig

httim

eN

ightti

me

• DP2 is caused by the penetration from polar region. Its origin comes from the solar wind.

• We can observe this phenomenon by MAGDAS magnetometer and FM-CW radar

Ikeda et al., SGEPSS 2010 meeting

STP phenomena: Pc3, 4 and 5• Pc3,4,5 and Pi2(focused later) are kinds of Ultra Low

Frequency waves in geomagnetic pulsations. • These are categorized by wave form (Continuous or

Irregular) and period.


Type Period(sec) Frequency(mHz)

STP phenomena: Pc3, 4 and 5• Applying the bandpass filter to MAGDAS data, you

can see Pc pulsations clearly.


Takla et al., Preliminary Results of Latitudinal Dependence of Pc3-4 Amplitudes at 96 MM Stations in Africa

Oct 10, 2008 08:00-09:00 UT Oct 10, 2008 08:00-09:00 UT

KRT

AAB

NAB

DES

LSK

MPT

STP phenomena: Pc3, 4 and 5• Applying the bandpass filter to our MAGDAS data,

you can see Pc pulsations clearly.



Oct 10, 2008 09:00-10:00 UT Oct 10, 2008 09:00-10:00 UT

KRT

AAB

NAB

DES

LSK

MPT

STP phenomena: Pc3, 4 and 5• Dynamic spectrum plot helps us to understand

Pc3,4 and 5 visually.



Oct 4, 2008 08:00-10:00 UT Oct 4, 2008 08:00-10:00 UT

KRT

DRB

NAB

DES

LSK

MPT

STP phenomena: Geomagnetic storm• Geomagnetic storm is a

maximum scale phenomenon in the Solar-Terrestrial Physics.

• Due to a coronal mass ejections (CME), corotating interaction region (CIR), or some effects, Earth's magnetosphere is disturbed.


2009/09/28 自然と科学第 1 回＠福岡工業大学 27

Geomagnetic StormSSC

2009/12/07 自然と科学第 9 回＠福岡工業大学 28

STP phenomena: substorm and Pi2

970127

17:00UT15:00

1600 Pi 2 Onsets

One-to-one correspondence between aurora breakup and Pi 2 Onset

• Substorm is one of magnetospheric disturbances, and exciting topic in Solar-Terrestrial Physics research.

• Pi 2 pulsations and aurora breakups are simultaneously occurred during substorm.

Summary

• In this presentation, we introduced near real-time data transfer systems from oversea stations. MAGDAS is challenging and exciting project.

• We have released Africa MAGDAS data collection DVD. We introduced the contents of this media for your help.

• We presented some examples of STP phenomena which can know from MAGDAS data.


ISWI UN/NASA/JAXA Workshop, Helwan, Egypt 30

Thank you for your attention!

That’s all!

How to use MAGDAS Data for Science -- STP Phenomena in MAGDAS Data - S. Abe, T. Uozumi, A. Ikeda, Y....

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