SouthEast Asia Low-latitude IOnospheric Network (SEALION)

SEALION is an ionospheric observation network in Southeast Asia. It has been conducted by NICT since 2003 for the purpose of monitoring and forecasting equatorial ionospheric disturbances, especially plasma bubbles. SEALION is a unique ionospheric observation network in having the conjugate observational points in the northern and southern hemispheres and around the magnetic equator.

Data Service

Observation Sites and Methods
Site (ID) Lat. Lon. Dip Lat.* Country
 Chiang Mai (CMU)   18.76   98.93   12.7   Thailand 
 Bangkok (KMI)   13.73   100.78   6.7   Thailand 
 Chumphon (CPN)   10.72   99.37   3.0   Thailand 
 Phuket (PKT)   8.09   98.32   -0.2   Thailand 
 Phuket (PTC)   7.90   98.39   -0.4   Thailand 
 Kototabang (KTB)   -0.20   100.32   -10.1   Indonesia 
 Phu Thuy (PHT)   21.03   105.96   15.6   Vietnam 
 Bac Lieu (BCL)   9.30   105.71   1.5   Vietnam 
 Hainan (HAN)   19.53   109.13   13.7   China 
 Cebu (CEB)   10.35   123.91   3.09   Philippines 
 * Dip Latitude at 300 km altitude by IGRF-10 (2005)

Method

  Site  Method

Site
 Ionosonde (FMCW)   CMU 
 CPN 
 KTB 
 PHT 
 BCL 
 CEB 
  GPS-TEC   CMU 
 KMI 
 CPN 
 PTC
 GPS-Scintillation   PHT 
 HAN 
  Magnetometer  PKT 
     All-Sky Imager   CMU

SEALION is a joint project among the following institutions and countries:

  • National Institute of Information and Communications Technology (NICT), Japan
  • King Mongkut's Institute of Technology Ladkrabang (KMITL), Thailand
  • Chiang Mai University (CMU), Thailand
  • National Institute of Aeronautics and Space (LAPAN), Indonesia
  • Hanoi Institute of Geophysics (HIG), Vietnamese Academy of Science and Technology, Vietnam
  • Center for Space Science and Applied Research (CSSAR), Chinese Academy of Sciences, China
  • University of San Carlos (USC), Philippines
  • Kyoto University, Japan

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