1. G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 1/17
Real time Data Transfer Techniques of the Global MAGDAS Magnetometer Network
G.Maeda, S.Abe, T.Uozumi,
L.M. Musafar, K.Yumoto.
Presented at
2009 UN BSS & IHY Workshop
21-25 Sept, 2009
Daejeon, Korea.
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 1/17

2. G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 2/17
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 2/17

3. G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 3/17
MAGDAS Data Volume
MAGDAS I (3 MB per day), creates
about 1 GB per year.
MAGDAS II (0.6 MB per day), creates
about 0.2 GB per year.
THEREFORE, THE MAGDAS ARRAY
GENERATES ABOUT 42 GB/YEAR.
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 3/17

4. G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 4/17
MAGDAS I magnetometer
Data logger (main unit)
Cable to sensor
(70m in length)
3. Fluxgate sensor
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 4/17

5. Computer portion of the MAGDAS II magnetometer
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 5/17

6. Right now there are 49 MAGDAS Stations
Recent addition:
(49) LGZ
Legazpi, Philippines
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 6/17

7. Types of Land Used by MAGDAS units in the field
Observatory
University campus
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 7/17

8. Types of Internet connections used by MAGDAS in the field.
Satellite regular IP IP via cellphone ISDN ADSL no Internet
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 8/17

9. Original Telemetry Design of the MAGDAS I System (Year 2003)
- Via modem and mobile satellite telephone
- Via modem and regular phone circuits
- Via Internet
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 9/17

10. G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 10/17
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 10/17

11. Two Challenging Countries for Real Time Data Transmission
● Philippines
● Indonesia
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 11/17

12. G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 12/17
TGG
MUT
LGZ
CEB
There are 5
MAGDAS
Stations
In the
Philippines
DAV
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 12/17

13. In the Philippines MAGDAS uses Smart Bro
(Internet service based on cellular telephone technology)
Now over
384,000
subscribers
in the
Philippines
Cost is about
20 USD per month
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 13/17

14. G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 14/17
There are 3 MAGDAS Stations in Indonesia:
MND – Manado (most north)
PRP – Pare Pare (central)
KPG – Kupang (most south)
MND
Sensor
KPG
PRP
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 14/17

15. (a graduate of Kyushu University but now working in Indonesia).
Telemetry system used by MAGDAS in Indonesia was developed by L. M. Musafar
(a graduate of Kyushu University but now working in Indonesia).
To send data to Bandung (near Jakarta) using the country’s GSM cellphone network, there are three possible methods (according to Mr Musafar):
1. General Packet Radio Service (GPRS)
2. Short Message Service (SMS)
3. High Speed Downlink Packet Access (HSDPA)
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 15/17

16. Via Indonesia’s GSM cellphone network
Eastern Indonesia
Manado
Western Indonesia
FTP Server
LAPAN
Bandung
Java Island
Indonesia.
Pare Pare
Kupang
Via Indonesia’s GSM cellphone network
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 16/17

17. Thank you ! From the entire MAGDAS Project
Team of SERC at Kyushu University
22 Sept 2009
G. Maeda - IHY Korea Workshop – MAGDAS Telemetry Slide 17/17